Details of the Researcher

PHOTO

Shigeru Obayashi
Section
Institute of Fluid Science
Job title
Professor
Degree

  • 工学博士（東京大学）

  • 工学修士（筑波大学）

Research History 20

  • 2012/07 - 2014/03
    Tohoku University

  • 2025/04 - Present
    Tohoku University　Professor emeritus

  • 2025/04 - Present
    Tohoku University　Institute of Fluid Science　Professor

  • 2020/10 - 2026/03
    Tohoku University

  • 2017/04 - 2025/03
    Tohoku University　Institute of Fluid Science Aircraft Computational Science Center

  • 2013/04 - 2025/03
    Tohoku University

  • 2004/04 - 2025/03
    Tohoku University　Institute of Fluid Science　Professor

  • 2019/04 - 2024/03
    Tohoku University

  • 2014/04 - 2020/03
    Tohoku University　Institute of Fluid Science

  • 2017/04 - 2019/03
    Tohoku University　Material Solutions Center

  • 2013/04 - 2019/03
    Tohoku University

  • 2011/09 - 2014/09
    XI'AN JIANTONG UNIVERSITY　ADJUNCT PROFESSORSHIP

  • 2008/04 - 2013/03
    Tohoku University

  • 2003/04 - 2013/03
    Tohoku University　Institute of Fluid Science

  • 2011/04 - 2012/03
    Tohoku University

  • 2000/07 - 2003/03
    Tohoku University　Institute of Fluid Science

  • 1995/04 - 2000/06
    Tohoku University　Graduate School of Engineering

  • 1994/04 - 1995/03
    Tohoku University　Faculty of Engineering

  • 1989/04 - 1994/03
    エムキャット研究所（MCAT Institute）上級研究員

  • 1987/04 - 1989/03
    米国航空宇宙局エイムズ研究所　米国国立研究審議会客員研究員

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Education 3

  • The University of Tokyo

    1984/04 - 1987/03

  • University of Tsukuba

    1982/04 - 1984/03

  • University of Tsukuba

    1978/04 - 1982/03

Committee Memberships 119

  • Aerospace　Editorial Board Member

    2021/05 - Present

  • 日本航空宇宙学会　フェロー

    2013/04 - Present

  • 日本機械学会　フェロー

    2006/04 - Present

  • 日本流体力学会　フェロー

    2005/12 - Present

  • 新エネルギー・産業技術総合開発機構　NEDO技術委員長

    2025/04 - 2026/03

  • 科学技術振興機構　経済安全保障重要技術育成プログラム プログラムディレクター

    2022/12 - 2026/03

  • 日本計算工学会　代表会員

    2022/04 - 2026/03

  • 日本計算工学会　フェロー

    2019/04 - 2026/03

  • 高度情報科学技術研究機構 アプリケーションソフトウェア利用環境整備アドバイザリ　WG委員

    2016/11 - 2026/03

  • 2024年度計算力学部門　設計と運用に活かすデータ同化研究会 委員長

    2024/04 - 2025/03

  • 文部科学省 科学技術・学術政策研究所 科学技術予測・政策基盤調査研究センター　専門調査員

    2023/05 - 2025/03

  • 新エネルギー・産業技術総合開発機構　NEDO技術委員

    2023/04 - 2025/03

  • 日本学術会議　連携会員

    2020/10 - 2025/03

  • 科学技術振興機構　戦略的創造研究推進事業 ACT-X研究領域「AI活用で挑む学問の革新と創成」領域アドバイザー

    2020/06 - 2025/03

  • Editorial Board of Progress in Aerospace Sciences　論文誌編集委員

    2003/04 - 2025/01

  • 宇宙航空研究開発機構　宇宙航空研究開発機構における航空機ライフサイクルDX促進研究開発に関する委員会委員

    2023/01 - 2023/03

  • 科学技術振興機構　経済安全保障重要技術育成プログラム 外部専門家

    2022/09 - 2023/03

  • 科学技術振興機構　戦略的創造研究推進事業個人型研究（さきがけ）外部評価者

    2022/06 - 2022/08

  • 日本計算工学会　代表会員

    2020/04 - 2022/03

  • 宇宙航空研究開発機構　航空科学技術分野に関する研究開発ビジョン検討に係る有識者委員会委員

    2020/10 - 2021/06

  • 宇宙航空研究開発機構　宇宙航空研究開発機構における計算・実験科学の基盤研究のあり方に関する委員会委員

    2021/01 - 2021/03

  • 科学技術振興機構　未来社会創造事業（探索加速型）「共通基盤」領域外部専門家

    2020/09 - 2021/03

  • 気象影響防御技術(WEATHER-Eye)コンソーシアム　乱気流対策専門分科会委員

    2020/08 - 2021/03

  • 宇宙航空研究開発機構 静粛超音速機技術実証に向けた有識者委員会　委員長

    2019/10 - 2021/03

  • 日本航空宇宙学会　第51期北部支部長

    2020/02 - 2021/02

  • 科学技術振興機構 研究開発戦略センター　外部有識者

    2020/11 - 2020/11

  • 日本学術会議 総合工学委員会 科学的知見の創出に資する可視化分科会 可視化の新パラダイム策定小委員会　委員

    2018/08 - 2020/08

  • 大阪大学 接合科学研究所 外部評価委員会　委員

    2019/08 - 2020/03

  • 東京大学 生産技術研究所　研究顧問

    2019/04 - 2020/03

  • 九州大学 応用力学研究所 応用力学研究拠点運営委員会　委員

    2014/04 - 2020/03

  • 情報・システム研究機構 統計数理研究所 運営委員会　委員

    2014/04 - 2020/03

  • 宇宙航空研究開発機構Safe Avio研究会　委員

    2012/06 - 2020/03

  • 日本流体力学会　会長

    2019/02 - 2020/02

  • 日本流体力学会　理事

    2017/02 - 2020/02

  • 東京大学 生産技術研究所　リサーチフェロー

    2018/04 - 2019/03

  • 日本航空宇宙学会　会長

    2018/04 - 2019/03

  • 日本流体力学学会　副会長

    2018/02 - 2019/02

  • 日本航空宇宙学会　筆頭副会長

    2017/04 - 2018/03

  • 宇宙航空研究開発機構 乱気流事故防止機体技術の実証（Safe Avio)プロジェクト終了審査に係る外部評価委員会　委員

    2017/05 - 2017/05

  • 進化計算学会　会長

    2014/10 - 2016/09

  • 日本機械学会 計算力学部門 設計情報学研究会　主査

    2011/10 - 2016/09

  • 日本流体力学会　2014年度(第22期)代議員

    2014/04 - 2016/03

  • 日本計算工学会　代表会員

    2014/04 - 2016/03

  • 高度情報科学技術研究機構 利用研究課題審査委員会　レビュアー

    2013/12 - 2016/03

  • 宇宙航空研究開発機構　静粛超音速機技術の研究開発に関する外部有識者委員会委員

    2010/07 - 2016/03

  • 宇宙航空研究開発機構 計算科学の基盤研究に関する委員会　委員

    2005/10 - 2016/03

  • 宇宙航空研究開発機構 D-SENDプロジェクト終了審査　委員

    2016/02 - 2016/02

  • 日本機械学会　2014年度(92期)代表会員

    2014/04 - 2015/03

  • 日本航空宇宙学会空力部門ソニックブーム研究会　主査

    2010/03 - 2015/02

  • 進化計算学会　副会長

    2012/10 - 2014/09

  • 進化計算学会　理事

    2012/10 - 2014/09

  • 宇宙航空研究開発機構 JAXA航空機システム研究に関する外部有識者委員会　委員

    2009/07 - 2014/03

  • 日本航空宇宙学会　代議員

    2013/03 - 2014/02

  • 宇宙航空研究開発機構航空プログラムグループ　航空プログラム推進委員 委員

    2011/04 - 2013/03

  • 日本学術振興会　科学研究費委員会専門委員

    2009/12 - 2013/01

  • 宇宙航空研究開発機構 JAXA次期スーパーコンピュータに関する調査検討委員会　委員

    2012/09 - 2012/12

  • 日本航空宇宙学会　選挙管理委員会委員

    2011/06 - 2012/04

  • The Japan Society of Fluid Mechanics　議員

    2010/04 - 2012/03

  • 日本流体力学学会　議員

    2010/04 - 2012/03

  • 進化計算学会　理事

    2010/04 - 2012/03

  • 日本計算工学会　評議員

    2008/04 - 2012/03

  • 日本計算工学会　理事

    2006/04 - 2012/03

  • 日本機械学会　複合領域における設計探査研究会

    2006/10 - 2011/09

  • 日本機械学会 計算力学部門 複合領域における設計探査研究会　主査

    2006/10 - 2011/09

  • The Institute of Electrical and Electronics Engineers, Inc.(IEEE) IEEE Emergent Technologies Task Committee, Computational Intelligence Society　委員

    2006/01 - 2011/09

  • 日本航空宇宙学会第42期評議委員会　委員

    2010/03 - 2011/02

  • 日本航空宇宙学会　理事

    2009/03 - 2011/02

  • 日本機械学会　第87期計算力学部門 広報委員会 委員長

    2009/04 - 2010/03

  • 日本機械学会　第87期計算力学部門 部門長

    2009/04 - 2010/03

  • 日本機械学会 第87期能力開発促進機構 計算力学技術者認定事業委員会　委員長

    2009/04 - 2010/03

  • 日本機械学会 第87期計算力学部門 総務委員会　部門長

    2009/04 - 2010/03

  • 日本機械学会 第87期計算力学部門 部門協議会　委員

    2009/04 - 2010/03

  • 日本機械学会 第87期能力開発促進機構 計算力学技術者認定事業委員会　委員長

    2009/04 - 2010/03

  • 日本機械学会 第87期計算力学部門 総務委員会　委員長

    2009/04 - 2010/03

  • 日本機械学会・Journal of Fluid Science and Technology編集委員会　編集委員

    2005/09 - 2010/03

  • 日本機械学会　計算力学部門 最適設計技術委員会 委員

    2005/04 - 2010/03

  • 日本航空宇宙学会空力部門サイレント超音速旅客機研究会　主査

    2005/10 - 2009/09

  • 日本機械学会 第86期計算力学部門　副部門長

    2008/04 - 2009/03

  • 日本機械学会 第86期計算力学部門　事業企画委員会委員長

    2008/04 - 2009/03

  • 日本機械学会 第86期能力開発促進機構 計算力学技術者認定事業委員会　単相流WG委員

    2008/04 - 2009/03

  • 日本機械学会 第86期能力開発促進機構 計算力学技術者認定事業委員会　熱流体力学分野 試験問題作成委員（１級単相流）

    2008/04 - 2009/03

  • 日本航空宇宙学会　受託研究委員長

    2008/04 - 2009/02

  • アメリカ航空宇宙学会 (American Institute of Aeronanticsad Astonaitics)　知的システム技術委員会委員(1998-)

    1998/04 - 2009/01

  • 宇宙航空研究開発機構　宇宙航空研究開発機構における計算科学の基盤研究に関する委員会

    2007/04 - 2008/03

  • 日本機械学会能力開発促進機構 計算力学技術者資格認定事業委員会（熱流体分野）　主査

    2007/04 - 2008/03

  • 日本航空宇宙学会 航空宇宙技術リエゾン委員会　委員

    2007/04 - 2008/03

  • 宇宙航空研究開発機構　客員

    2006/04 - 2008/03

  • 日本航空宇宙学会　サイレント超音速機に関する調査研究(その２)受託委員会委員長

    2007/09 - 2008/02

  • 日本航空宇宙学会第３９期編集委員会（会誌）　委員

    2007/04 - 2008/02

  • Editorial Board, Journal of Inverse Problems in Science and Engineering　論文誌編集委員

    2003/04 - 2007/06

  • 文部科学省　科学技術・学術審議会専門委員

    2006/01 - 2007/01

  • 日本機械学会　流体と構造の複合問題研究会主査

    2003/09 - 2006/09

  • 宇宙航空研究開発機構　宇宙航空研究開発における計算科学の基盤研究に関する委員会

    2005/10 - 2006/03

  • 日本機械学会　Journal of Fluid Science and Technology編集委員会編集委員

    2005/09 - 2006/03

  • 日本機械学会　流体工学部門部門英文ジャーナル編集委員会委員

    2005/04 - 2006/03

  • 日本機械学会　計算力学部門運営委員

    2005/04 - 2006/03

  • 日本流体力学会　理事

    2005/04 - 2006/03

  • 日本機械学会　計算力学部門最適設計技術委員会委員

    2004/04 - 2006/03

  • 日本機械学会　JSME International Journal編集委員会 編集委員

    2004/04 - 2006/03

  • 日本航空宇宙学会　第37期空気力学部門委員会 委員

    2005/04 - 2006/02

  • 日本航空宇宙学会　空力部門委員

    2004/04 - 2005/03

  • 日本航空宇宙学会　ICAS連絡委員会委員

    2003/04 - 2005/03

  • 日本航空宇宙学会　ICAS国内委員会委員

    2003/04 - 2005/03

  • 宇宙航空研究開発機構飛行実証研究会　飛行実証研究会委員

    2003/04 - 2004/10

  • 日本航空宇宙学会　理事

    2002/03 - 2004/02

  • 日本航空宇宙学会　学会誌編集長

    2002/03 - 2004/02

  • 日本機械学会　流体工学部門技術委員会委員

    2001/04 - 2003/03

  • 日本機械学会　計算力学部門流体と構造の複合問題の技術委員会委員長

    2000/04 - 2002/03

  • 日本航空宇宙学会　学会誌編集員

    2000/04 - 2002/03

  • 日本機械学会　流体工学部門広報委員

    1999/04 - 2001/03

  • 日本機械学会　ＲＣ159流れの実験・解析ハイブリット処理研究分科会委員

    1998/04 - 2001/03

  • 東北地区計算機利用協議会　連絡会委員

    1998/04 - 2001/03

  • 日本航空宇宙学会　評議委員

    2000/03 - 2001/02

  • 日本数値流体力学会　編集委員

    1999/04 - 2000/03

  • 日本航空宇宙学会　日本航空宇宙学会北部支部幹事

    1996/04 - 2000/03

  • The 4th International Conference on Evolutinary Multi-Criterion Optimization　議長

    2007/03 -

  • ＥＭＯ2007（第4回進化型多目的最適化に関する国際会議）　議長

    2007/03 -

  • International Workshop on Multidisciptionary Design Exploration in Okinawa 2006　実行委員長

    2006/12 -

  • 日本航空宇宙学会　空力部門委員長

    2006/04 -

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Professional Memberships 7

  • 日本流体力学会

  • 進化計算学会

  • 日本計算工学会

  • Institute of Electrical and Electronics Engineers(IEEE)

  • 日本航空宇宙学会

  • 日本機械学会

  • American Institute of Aeronautics and Astronautics (AIAA)

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Research Interests 3

  • 航空機設計

  • 進化的計算法

  • 数値流体力学

Research Areas 3

  • Informatics / Intelligent informatics / Genetic Algorithms

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Fluid engineering /

  • Aerospace, marine, and maritime Engineering / Aerospace engineering /

Awards 16

  1. 日本機械学会流体工学部門賞

    2021/11　日本機械学会流体工学部門

  2. 流体科学賞

    2014/10　財団法人機器研究会

  3. Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology

    2014/04/15　文部科学省　多目的設計探査とその応用に関する研究

  4. 日本機械学会計算力学部門功績賞

    2012/10　日本機械学会　学術，技術，学会活動，出版，国際交流などで計算力学の発展と進歩に貢献

  5. 日本機会学会賞

    2010/04/23　日本機会学会　Kiring-Model-Based Multi-Objective Robust Optimization and Trade-Off Rule Mining of a Centrifugal Fan with Dimensional Uncertainty

  6. 日本計算工学会学会賞川井メダル

    2009/05/12　日本計算工学会

  7. 平成20年度日本機械学会東北支部技術研究賞

    2009/03/13　日本機械学会東北支部　ターボ機械の多目的ロバスト設計探査

  8. 第13回計算工学講演会グラフィクスアワード特別賞

    2008/05/19　第13回計算工学講演会実行委員会　没入的仮想環境を用いた仙台空港における後方乱気流の視覚解析のグラフィックス

  9. 2007年度日本機械学会船井賞

    2008/03/25　日本機械学会

  10. 日本機械学会計算力学部門2002年度業績賞

    2002/11　日本機械学会計算力学部門

  11. NASA Space Act Software Release Award

    2002/04/15　NASA　米国航空宇宙局ソフトウエア公開賞

  12. 1998 NASA Software of the Year Award

    1998/10/01　NASA　Overset Tools for CFD Analysis

  13. NASA Ames Honor Award

    1993/08　NASA Ames Research Center　米国航空宇宙局エイムズ研究所栄誉賞

  14. NASA Space Act Award

    1992/11　NASA　米国航空宇宙局宇宙研究賞、米国航空宇宙局の受賞者の中から特に米国の宇宙開発に貢献したものに与えられる

  15. NASA Group Achievement Award

    1989/02　NASA　米国航空宇宙局グループ研究賞

  16. NASA Space Shuttle Recovery Honor Awards, Group Achievement Award

    1988/12　NASA　米国航空宇宙局スペースシャトル復帰栄誉賞，グループ研究賞

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Papers 454

  1. An Experimental Study on a Blockage Effect of Sting-Free AxialCircular Cylinders

    Hiroyuki Okuizumi, Yuki Wajima, Yasufumi Konishi, Hideo Sawada, Shigeru Obayashi, Naofumi Ohnishi

    Fluids　10(2)　(42)　2025/02/09

    DOI： 10.3390/fluids10020042 　

  2. Pareto optimal robust design combining isogeometric analysis and sparse polynomial chaos: brake squeal case study Peer-reviewed

    Achille Jacquemond, Frédéric Gillo, Koji Shimoyama, Shigeru Obayashi, Sébastien Besse

    Applied Mechanics　95　(56)　1-17　2025/01/29

  3. Aerodynamic Characteristics of Magnetically Suspended Square Cylinders with Low Fineness Ratio

    Hiroyuki Okuizumi, Rintaro Makino, Masatoshi Horiguchi, Yuji Saito, Hideo Sawada, Yasufumi Konishi, Shigeru Obayashi, Keisuke Asai, Taku Nonomura

    Journal of Aircraft　1-7　2024/12/08

    Publisher: American Institute of Aeronautics and Astronautics (AIAA)

    DOI： 10.2514/1.c038102 　

    ISSN： 0021-8669

    eISSN： 1533-3868

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    It is common that bluff bodies form complex wake structures and act on themselves with significant influence on aerodynamic forces. A square cylinder was studied as a typical model that makes complex flowfields. A magnetic suspension and balance system (MSBS) was used to support the model with magnetic forces and eliminate the influence of mechanical supports on the flowfield of wind-tunnel testing. The aerodynamic forces and base pressure of the square cylinder models with fineness ratios (L/D) of 1.0, 1.2, 1.68, and 2.0 were measured using the MSBS. The employed Reynolds numbers were from [Formula: see text] to [Formula: see text]. The drag coefficients were independent of the Reynolds number Re and could be divided into two regions between [Formula: see text] and 1.68. The base pressure coefficient decreased monotonically from 1.0 to 1.68. The drag did not significantly change for [Formula: see text] and 1.2 with angles of attack from -2 to 2 deg. In contrast, it quadratically increased from [Formula: see text] and 2.0. The lift–curve slopes were negative from [Formula: see text] to 1.2 and positive from [Formula: see text] to 2.0, confirming the reversal. The moment–curve slopes were negative for all fineness ratios. Notably, these changed linearly from [Formula: see text] to 1.2 and nonlinearly from [Formula: see text] to 2.0. The visualization test using the surface-oil-flow method revealed that the square cylinders had a reattachment position near [Formula: see text] for [Formula: see text] and [Formula: see text] for [Formula: see text]. This suggests that the reversal of the lift–curve slope was caused by reattachment.

  4. Impact of atmospheric variations on sonic boom loudness over 10 years of simulated flights

    Rei Iura, Takahiro Ukai, Hiroshi Yamashita, Bastian Kern, Takashi Misaka, Shigeru Obayashi

    The Journal of the Acoustical Society of America　156　(3)　1529-1542　2024/09/01

    Publisher: Acoustical Society of America (ASA)

    DOI： 10.1121/10.0028375 　

    ISSN： 0001-4966

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    Relative humidity, temperature, and wind along flight paths from a 10-year simulation are used to investigate the effects of the atmospheric conditions on sonic boom loudness generated by the pseudo-Concorde and a low-boom supersonic aircraft using an acoustic wave propagation tool. Global meteorological conditions are simulated using the chemistry-climate model EMAC with ECMWF reanalysis data. The results show that atmospheric conditions lead to a seasonal variation of the perceived level for a N-wave over 10 years of flights, whereas it is difficult to identify the seasonal variation for the low-boom aircraft because the distribution of perceived levels is widely spread. The dominant effect from atmospheric conditions during acoustic propagation is found for the low-boom aircraft cruising at an altitude of 14.478 km. The molecular relaxation effect is dominant for an overpressure reduction at 10 km but does not impact the pressure waveform below 8 km. At altitudes below 8 km, the thermoviscous absorption exclusively influences the variations in pressure rise time. Moreover, acoustic wave propagation through the turbulent field was simulated at a single location. Even though the acoustic wave passed through the same turbulent field in the summer and winter cases, the loudness on the ground differs between them.

  5. Flow Sensitivity Analysis for the Feedback Loop Phenomenon of Subsonic Jet Noise Generation Peer-reviewed

    S. Morita, A. Yakeno, C. Bogey, S. Obayashi

    Progress in Turbulence X (iTi 2023)　281-286　2024/08

  6. Data assimilation for combustion ignition delay time simulation using schlieren image velocimetry

    Aiko Yakeno, Rin Inamura, Naoki Watanabe, Ryoichi Yoshimura, Shigeru Obayashi, Naoki Kurimoto, Scott Skeen

    Flow Measurement and Instrumentation　97　102596-102596　2024/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.flowmeasinst.2024.102596 　

    ISSN： 0955-5986

  7. Multi-objective design space exploration using explainable surrogate models

    Pramudita Satria Palar, Yohanes Bimo Dwianto, Lavi Rizki Zuhal, Joseph Morlier, Koji Shimoyama, Shigeru Obayashi

    Structural and Multidisciplinary Optimization　67　(3)　2024/02/28

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1007/s00158-024-03769-z 　

    ISSN： 1615-147X

    eISSN： 1615-1488

  8. Effects of Surface Roughness and Free-stream Turbulence on Transition in Swept-Wing Boundary Layer

    Yuji Mori, Aiko Yakeno, Shigeru Obayashi

    AIAA SCITECH 2024 Forum　2024/01/04

    Publisher: American Institute of Aeronautics and Astronautics

    DOI： 10.2514/6.2024-1565 　

  9. Experimental Validation of the Suppression of Crossflow Instability by Sinusoidal Roughness Elements

    Sayaka Suzuki, Aiko Yakeno, Yasufumi Konishi, N. Tokugawa, Makoto Hirota, Hikaru Takami, Shigeru Obayashi

    AIAA SCITECH 2024 Forum　2024/01/04

    Publisher: American Institute of Aeronautics and Astronautics

    DOI： 10.2514/6.2024-0891 　

  10. Polynomial-Based Shapley Additive Explanations for Design Exploration in Turbomachinery

    Pramudita S. Palar, Koji Shimoyama, Shigeru Obayashi

    AIAA SCITECH 2024 Forum　2024/01/04

    Publisher: American Institute of Aeronautics and Astronautics

    DOI： 10.2514/6.2024-1226 　

  11. DNS of Boundary-Layer Transition over a Transonic Swept Wing under Real Flight Condition

    Yuji Mori, Aiko Yakeno, Shigeru Obayashi

    AIAA Aviation Forum and ASCEND, 2024　2024

    DOI： 10.2514/6.2024-4486 　

  12. Toward Integrated Aircraft Design with Carbon Fiber Reinforced Thermoplastic (CFRTP)

    Yoshiaki Abe, Keiichi Shirasu, Shugo Date, Tomonaga Okabe, Shigeru Obayashi

    Advanced Computational Methods and Design for Greener Aviation　59　229-239　2024

    DOI： 10.1007/978-3-031-61109-4_15 　

  13. Study of an Aeroacoustic Internal Feedback Loop in a High-Speed Jet Using Mode Decomposition Methods Peer-reviewed

    Shota Morita, Aiko Yakeno, Bogey Christophe, Obayashi Shigeru

    Journal of Flow and Energy　2　67-83　2024

  14. Drag reduction effect of distributed roughness on the transitional flow state using direct numerical simulation

    Shingo Hamada, Aiko Yakeno, Shigeru Obayashi

    International Journal of Heat and Fluid Flow　104　109230-109230　2023/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.ijheatfluidflow.2023.109230 　

    ISSN： 0142-727X

  15. Clear Air Turbulence Resolved by Numerical Weather Prediction Model Validated by Onboard and Virtual Flight Data

    R. Yoshimura, J. Ito, P. A. Schittenhelm, K. Suzuki, A. Yakeno, S. Obayashi

    Geophysical Research Letters　50　(12)　2023/06/21

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022gl101286 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  16. Large-Eddy Simulation of Wake Vortices at Tokyo/Haneda International Airport

    Takashi Misaka, Ryoichi Yoshimura, Shigeru Obayashi, Ryota Kikuchi

    Journal of Aircraft　1-13　2023/04/18

    Publisher: American Institute of Aeronautics and Astronautics (AIAA)

    DOI： 10.2514/1.c037319 　

    ISSN： 0021-8669

    eISSN： 1533-3868

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    A large-eddy simulation (LES) of wake vortices in ground effect is conducted under the influence of airport hangar buildings to investigate the airport-specific behavior of wake vortices. We consider a landing at Tokyo/Haneda International Airport in Japan, where a wake of hangar buildings covers a landing path and touchdown zone under particular wind conditions. We combine an LES code and the Weather Research and Forecasting numerical weather prediction model to retrieve realistic wind conditions around the airport. The behavior of wake vortices is then investigated in the retrieved wind field using the adaptive mesh capability of the LES code for capturing the tiny vortex core of the wake vortex. At the crosswind on the order of a vortex descent speed, the hangar wake reduces the crosswind near the runway, enhancing the windward vortex’s rebound. The effect is alleviated by doubling the crosswind to twice the vortex descent speed. On the other hand, the wind fluctuations caused by the hangar buildings only slightly affect the wake vortex decay.

  17. A formulation of industrial conceptual design optimization problem for commercial transport airplanes with turboelectric propulsion

    Hikaru Takami, Shigeru Obayashi

    Frontiers in Aerospace Engineering　2　2023/03/10

    Publisher: Frontiers Media SA

    DOI： 10.3389/fpace.2023.1113646 　

    eISSN： 2813-2831

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    A conceptual design optimization problem for commercial transport airplanes with turboelectric propulsion, with a reasonable fidelity and comprehensiveness suitable for industrial purposes, is formulated, in order to allow for proper assessment of the benefits of turboelectric propulsion. As a sample problem, we carry out conceptual design optimization of a turboelectric propulsion airplane concept in a conventional tube-and-wing configuration with a turbofan and an associated electric fan on each (i.e., left and right) wing, varying the performance of the turboelectric propulsion devices. The results indicate that proper assessment of the benefits of the turboelectric propulsion can be carried out using the formulated optimization problem. The findings from the sample problem, including notable benefits of the turboelectric propulsion and the performance crossover point where the fuel efficiency of an airplane with conventional propulsion and that of an airplane with turboelectric propulsion cross over, are also presented.

  18. Model position sensing method for low fineness ratio models in a magnetic suspension and balance system

    Chiharu Inomata, Masahide Kuwata, Sho Yokota, Yoshiaki Abe, Hideo Sawada, Shigeru Obayashi, Keisuke Asai, Taku Nonomura

    Review of Scientific Instruments　94　(2)　025102-025102　2023/02/01

    Publisher: AIP Publishing

    DOI： 10.1063/5.0113806 　

    ISSN： 0034-6748

    eISSN： 1089-7623

  19. Aeroacoustic control mechanism on near-wall-wing of Aero-train based on plasma jet

    Chenguang Lai, Liangkui Tan, Shigeru Obayashi

    Physics of Fluids　35　(2)　025122-025122　2023/02/01

    Publisher: AIP Publishing

    DOI： 10.1063/5.0136669 　

    ISSN： 1070-6631

    eISSN： 1089-7666

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    In this study, an aeroacoustic control mechanism of a plasma jet acting on a high-speed moving wing under a wing-in-ground effect is investigated. Moreover, a novel method is proposed to reduce the aeroacoustics of Aero-train wings. Numerical simulations of the aeroacoustics generated by flow around a National Advisory Committee for Aeronautics 4412 wing are performed under three different plasma excitation modes at four clearances with an incoming flow velocity of 0.3 Ma and an angle of attack of 5°. The results show that different plasma excitation modes interfere with the vortex generation and development in different ways to achieve aeroacoustic reduction. The UP excitation mode delays the airflow separation, delays the vortex generation and development, and reduces the vortex intensity. The BOTH excitation mode forces transverse vortices to transform into streamwise hairpin vortices and reduces the local pressure fluctuation intensity. Hence, plasma jets exhibit a good control effect on the peak aeroacoustics under different clearance conditions but result in the frequency shift effect of acoustic energy transfer to high frequencies. The modal analysis of the flow field of the three excitation conditions via a proper orthogonal decomposition method reveals that the trend of the modal change is similar for the three excitation conditions, and the change in each order of the modal corresponds to the energy decrease at the peak frequency and the energy increase at high frequencies.

  20. Correction: Measurement of Aerodynamic Characteristics of Square Cylinders with Low Fineness Ratio Using 1-m Magnetic Suspension and Balance System

    Hiroyuki Okuizumi, Rintaro Makino, Hideo Sawada, Yasufumi Konishi, Shigeru Obayashi, Taku Nonomura

    AIAA SCITECH 2023 Forum　2023/01/23

    Publisher: American Institute of Aeronautics and Astronautics

    DOI： 10.2514/6.2023-2012.c1 　

  21. Flow characteristics and wake topology of two-seat convertibles

    Chenguang Lai, Shengji Zhu, Shuai Feng, Guangtao Zhai, Liangkui Tan, Shigeru Obayashi

    Physics of Fluids　35　(1)　015144-015144　2023/01

    Publisher: AIP Publishing

    DOI： 10.1063/5.0134090 　

    ISSN： 1070-6631

    eISSN： 1089-7666

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    This study aims to clarify the flow characteristics and the wake structure of convertible vehicles. Numerical simulations are performed to obtain a preliminary visualization, and the potential vortical motion characteristics are investigated by examining the Q-criterion across multiple cross sections. Comparisons between numerical and experimental results validate the reasonableness of our numerical model. The predominant wake topology of a two-seat convertible is obtained in terms of the location, shape, and spin direction of the vortices. We observe a “nook” vortex that is triggered by the flow acceleration induced by the pressure gradient near the windshield step, provoking undesirable aeroacoustic noise and degrading the cabin comfort. Complicated A-pillar vortex dynamics are revealed, with small vortices that are shed into the cabin and impinge the seats, eventually forming a long tail structure above the back of the vehicle. Moreover, periodic fluctuations of the windshield vortex are induced by the Kelvin–Helmholtz instability, significant impacting the streamwise wake. Ultimately, the combined motion characteristics of the A-pillar and windshield vortices exert undesirable effects on the aeroacoustic noise and drag, suggesting fundamental mechanisms for achieving optimal energy-saving and acoustic convertibles in the future. Based on the wake topology and the vortical generating mechanism, some approaches are proposed to reduce the drag and aeroacoustic noise by impeding the flow over the door into the cabin, modifying the shape of windshield step, and lengthening the windshield in stream direction.

  22. Measurement of aerodynamic force and moment acting on a javelin using a magnetic suspension and balance system Peer-reviewed

    Kazuya Seo, Hiroyuki Okuizumi, Yasufumi Konishi, Takuto Kobayashi, Hiroaki Hasegawa, Shigeru Obayashi

    scientific reports　13　(391)　1-11　2023

  23. Effect of particle arrangement and density on aerodynamic interference between twin particles interacting with a plane shock wave

    Shun Takahashi, Takayuki Nagata, Yusuke Mizuno, Taku Nonomura, Shigeru Obayashi

    Physics of Fluids　34　(11)　113301-113301　2022/11

    Publisher: AIP Publishing

    DOI： 10.1063/5.0101365 　

    ISSN： 1070-6631

    eISSN： 1089-7666

  24. Lap-shear strength and fracture behavior of CFRP/3D-printed titanium alloy adhesive joint prepared by hot-press-aided co-bonding Peer-reviewed

    Keiichi Shirasu, Masayoshi Mizutani, Naoki Takano, Hajime Yoshinaga, Tsuyoshi Oguri, Ken ichi Ogawa, Tomonaga Okabe, Shigeru Obayashi

    International Journal of Adhesion and Adhesives　117　2022/09

    DOI： 10.1016/j.ijadhadh.2022.103169 　

    ISSN： 0143-7496

  25. Investigation of a Planar Wing with Wing Grid using CRM.65.airfoil Peer-reviewed

    Seiichiro Morizawa, Shigeru Obayashi

    Bulletin of National Institute of Technology, Okinawa College　(16)　47-60　2022/08

    DOI： 10.51104/nitokinawacollege.16.0_61 　

  26. A Formulation of the Industrial Conceptual Design Optimization Problem for Commercial Transport Airplanes Peer-reviewed

    Hikaru Takami, Shigeru Obayashi

    Aerospace　1-21　2022/06/16

  27. Aeroacoustic characteristics of multi-directional wing under the wing-in-ground effect

    Chenguang Lai, Liangkui Tan, Yujie Zhu, Shengji Zhu, Shigeru Obayashi

    Physics of Fluids　34　(6)　067112-067112　2022/06

    Publisher: AIP Publishing

    DOI： 10.1063/5.0095968 　

    ISSN： 1070-6631

    eISSN： 1089-7666

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    Characteristics of the generation and propagation of aerodynamic noise are unique to conventional ground vehicles or aircraft due to the wing-in-ground (WIG) phenomenon. This study numerically examines the aeroacoustic characteristics of a multi-directional wing under the WIG effect with different values of clearance. The flow field was simulated by using a large eddy simulation for six groups of wings with different clearances and one group of wings in free space, at a freestream velocity of 0.3 Ma and an angle of attack of 5°. Acoustic simulations were carried out for each condition by using Möhring's analogy, and the acoustic analysis was based on details of the flow field. A multi-vortex system was generated at the trailing edge of the wing when the clearance was lower than 0.2 C. It consisted of an oscillating attached vortex that expanded and shrank with continuous changes in energy, and two periodically shedding vortices were formed that generated a strong wall-bound vortex street downstream of the wing after shedding. An analytical approach was used to simultaneously analyze different dominant frequencies in each region of the sound field. We conclude that different intensities of the WIG effect led to remarkable differences in the characteristic frequency of aerodynamic noise induced by the multi-directional wing. The characteristic frequencies of aerodynamic noise of the multi-directional wing with a low clearance (clearance ≤ 0.2 C) were mainly caused by the wall-bound vortex street while those at a high clearance (clearance ≥ 0.4 C) were mainly caused by vortices on the wingtip.

  28. Bayesian Uncertainty Reduction of Generalised k-ω Turbulence Model for Prediction of Film-Cooling Effectiveness

    Takashi Misaka, Takashi Nakazawa, Shigeru Obayashi, Seiji Kubo, Norio Asaumi, Takeomi Ideta

    International Journal of Computational Fluid Dynamics　36　(2)　152-166　2022/02/07

    Publisher: Informa UK Limited

    DOI： 10.1080/10618562.2022.2074001 　

    ISSN： 1061-8562

    eISSN： 1029-0257

  29. Large Eddy and Flight Simulations of a Clear Air Turbulence Event Over Tokyo on 16 December 2014 Peer-reviewed

    R. Yoshimura, K. Suzuki, J, Ito, R. Kikuchi, A. Yakeno, S. Obayashi

    Cover Journal of Applied Meteorology and Climatology Journal of Applied Meteorology and Climatology　1-54　2022/02

  30. Propagation of stationary and traveling waves in a leading-edge boundary layer of a swept wing

    A. Yakeno, S. Obayashi

    Physics of Fluids　33　(9)　094111-094111　2021/09

    Publisher: AIP Publishing

    DOI： 10.1063/5.0063936 　

    ISSN： 1070-6631

    eISSN： 1089-7666

  31. Flow characteristics around extremely low fineness-ratio circular cylinders Peer-reviewed

    Masahide Kuwata, Yoshiaki Abe, Sho Yokota, Taku Nonomura, Hideo Sawada, Aiko Yakeno, Keisuke Asai, Shigeru Obayashi

    Physical Review Fluids　6　(5)　2021/05/27

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevfluids.6.054704 　

    eISSN： 2469-990X

  32. Flow Simulation of Non-Newtonian Fluid through a Tube of Complicated Geometry

    KAWAMATA Shuusuke, KAWAMOTO Yuki, NARA Shotaro, NOHARA Tetsuo, TAKAHASHI Shun, OBAYASHI Shigeru

    The Proceedings of The Computational Mechanics Conference　2021.34　111　2021

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmecmd.2021.34.111 　

    eISSN： 2424-2799

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    When the non-Newtonian characteristics of the flow becomes stronger, the nonlinearity of the flow becomes stronger, and the numerical analysis becomes more unstable. Therefore, we studied a numerical model to realize the pressure-flow characteristics of the experiment even in numerical simulations of non-Newtonian fluids. In addition, we investigated the effect of complex geometry of a tube with non-Newtonian fluids, The non-Newtonian fluids simulation was conducted by power-law model, and immersed boundary method is employed to represent the corrugated tube. As a result, we confirmed that grid independency of the developed numerical model and good agreement with experimental data of pressure-flow rate characteristics.

  33. Parametric Study on Waverider Configurations at Low-supersonic Speed for Low-boom Supersonic Transport

    Potsawat BOONJAIPETCH, Koji SHIMOYAMA, Shigeru OBAYASHI

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　64　(6)　325-334　2021

    Publisher: Japan Society for Aeronautical and Space Sciences

    DOI： 10.2322/tjsass.64.325 　

    ISSN： 0549-3811

    eISSN： 2189-4205

  34. Aerodynamic characteristics of turbojav measured with 1-m magnetic suspension and balance system

    Hiroyuki Okuizumi, Kasumi Sasaki, Yasufumi Konishi, Shigeru Obayashi

    AIAA Scitech 2021 Forum　1-13　2021

  35. A new position and attitude measurement method for complex shape models with non-circular cross section in magnetic suspension and balance system

    Masatoshi Horiguchi, Yuji Saito, Taku Nonomura, Keisuke Asai, Hideo Sawada, Yasufumi Konishi, Hiroyuki Okuizumi, Shigeru Obayashi

    AIAA Scitech 2021 Forum　1-12　2021

  36. Influence of small wavy roughness on flatplate boundary layer natural transition Peer-reviewed

    Hiroki TAMEIKE, Aiko YAKENO, Shigeru OBAYASHI

    Journal of Fluid Science and Technology　16　(1)　JFST0008-JFST0008　2021/01/01

    Publisher: Japan Society of Mechanical Engineers

    DOI： 10.1299/jfst.2021jfst0008 　

    eISSN： 1880-5558

  37. Streamline pair selection for comparative flow field visualization Peer-reviewed

    Shoko Sawada, Takayuki Itoh, Takashi Misaka, Shigeru Obayashi, Tobias Czauderna, Kingsley Stephens

    Visual Computing for Industry, Biomedicine, and Art　3　(1)　2020/12

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1186/s42492-020-00056-8 　

    eISSN： 2524-4442

  38. Application of Ensemble Kalman Filter to Pedestrian Flow

    Fumiya Togashi, Takashi Misaka, Rainald Löhner, Shigeru Obayashi

    Collective Dynamics　5　A101-A101　2020/08/12

    Publisher: Forschungszentrum Julich, Zentralbibliothek

    DOI： 10.17815/cd.2020.101 　

    eISSN： 2366-8539

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    We adopted the Ensemble Kalman Filter (EnKF) methodology in our computational simulation code for pedestrian flows. The EnKF, which is a type of data assimilation methodology, has been developed in the field of weather forecast where the atmospheric condition varies hour by hour. The EnKF estimates the parameters or boundary/initial conditions in the numerical model based on the updated measured data. We considered the EnKF a promising tool for the simulation of pedestrian flows, which are notoriously difficult to predict. In this study, two scenarios were conducted to confirm the usefulness of the EnKF. The first case was unidirectional pedestrian flow in straight corridors, and the second case was Mataf scenario at the Kaaba in Mecca. Needless to say, the second scenario was very challenging because of the number of pilgrims and the degrees of freedom. In each scenario, we conducted the numerical simulation using the original parameter set and then applied the EnKF to improve the accuracy of the simulation.

  39. Finite surface discretization for incompressible Navier-Stokes equations and coupled conservation laws

    Arpiruk Hokpunna, Takashi Misaka, Shigeru Obayashi, Somchai Wongwises, Michael Manhart

    Journal of Computational Physics　109790-109790　2020/08

    Publisher: Elsevier BV

    DOI： 10.1016/j.jcp.2020.109790 　

    ISSN： 0021-9991

  40. 複数の前縁フラップの組合せによるデルタ翼空力特性の改善 Peer-reviewed

    石出忠輝, 髙木保鑑, 大坪咲智, 下山幸治, 大林茂

    日本実験力学会誌　20　(2)　101-108　2020/07/09

  41. Real-Time Estimation of Airflow Vector based on Lidar Observations for Preview Control

    Ryota Kikuchi, Takashi Misaka, Shigeru Obayashi, Hamaki Inokuchi

    2020/06/29

    Publisher: Copernicus GmbH

    DOI： 10.5194/amt-2020-106 　

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    Abstract. The control technique in a gust alleviation system by using the airborne Doppler Lidar technology is expected to enhance aviation safety to minimize the risks of turbulence-related accidents. Accurate measurement and estimation of the vertical wind velocity are very important in the successful implementation of a gust alleviation system by using the airborne Doppler Lidar technology. An estimation algorithm of airflow vector based on the airborne Lidars is proposed and investigated for preview control to prevent turbulence-induced aircraft accidents in flight. The use of the simple vector conversion method, which is an existing technique, assumes that the wind field between the Lidars is homogeneous. The assumption of a homogeneous field would be wrong when turbulence occurs due to large wind velocity fluctuation. The proposed algorithm stores the line-of-sight (LOS) wind data with each passing moment and uses recent and past LOS wind data in order to estimate the airflow vector. The recent and past LOS wind data are used to extrapolate the wind field between the airborne twin Lidars. Two numerical experiments – ideal vortex model and numerical weather prediction – were conducted to evaluate the estimation performance of the proposed method. The proposed method has much better performance than simple vector conversion in the two numerical experiments, and it can estimate accurate two-dimensional wind field distributions unlike simple vector conversion. The estimation performance and the computational cost of the proposed method can satisfy the performance demand for preview control.

  42. Measurement of the Aerodynamic Forces Acting on a Non-Spinning Javelin Using an MSBS

    Takuto Kobayashi, Kazuya Seo, Shoya Kaneda, Kasumi Sasaki, Kento Shinji, Shogo Oyama, Hiroyuki Okuizumi, Yasufumi Konishi, Hiroaki Hasegawa, Shigeru Obayashi

    Proceedings　49　(1)　144-144　2020/06/15

    Publisher: MDPI AG

    DOI： 10.3390/proceedings2020049144 　

    eISSN： 2504-3900

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    Using the world’s largest magnetic suspension and balance system (MSBS) and a low-turbulence wind tunnel, we successfully measured the aerodynamic forces acting on a non-spinning women’s javelin. It was found that the drag and the lift increased as the angle of attack was increased up to 18°. The pitching moment increased for angles of attack up to about 9°, and then decreased, becoming negative above 12°, indicating nose-down rotation. We used a pseudo supporting rod to simulate a javelin attached to a support, as used in a conventional setup, and confirmed that this interferes with the javelin by creating differences between the aerodynamics forces acting on the javelin with and without the pseudo supporting rod.

  43. Flow Behavior Caused by Air Permeability of Ski Jumping Suit Fabric

    Yuki Kataoka, Hiroaki Hasegawa, Masahide Murakami, Kazuya Seo, Shigeru Obayashi

    Proceedings　49　(1)　109-109　2020/06/15

    Publisher: MDPI AG

    DOI： 10.3390/proceedings2020049109 　

    eISSN： 2504-3900

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    The purpose of this study was to investigate the effect of the air permeability of ski jumping suit fabric on aerodynamic characteristics. In the study, four types of fabric with different air permeabilities were installed onto a fabric-clothed elliptic cylinder, and the flow behavior around its surface was investigated through wind tunnel experiments. The stall was delayed by using the fabric with higher air permeability. The air flow permeated the surface of the elliptic cylinder through the fabric for the fabric with high air permeability. This air flowed out into the separation region through the fabric again, which suppress stall. The stall characteristics for the fabric-clothed elliptic cylinder were influenced by the air permeability of the fabric. The boundary layer thickness on the outer surface and the turbulence levels of the boundary layer affected the air permeability of the fabric. The higher air permeability fabrics improved the stall characteristics.

  44. Data Assimilation for Clear Air Turbulence by Upstream LIDAR Observation

    Ryoichi Yoshimura, Aiko Yakeno, Shigeru Obayashi, Ryota Kikuchi, Takashi Misaka

    AIAA AVIATION 2020 FORUM　2020/06/15

    Publisher: American Institute of Aeronautics and Astronautics

    DOI： 10.2514/6.2020-2822 　

  45. A simple collision algorithm for arbitrarily shaped objects in particle‐resolved flow simulation using an immersed boundary method Peer-reviewed

    Takayuki Nagata, Mamoru Hosaka, Shun Takahashi, Ken Shimizu, Kota Fukuda, Shigeru Obayashi

    International Journal for Numerical Methods in Fluids　2020/03/10

    Publisher: Wiley

    DOI： 10.1002/fld.4826 　

  46. Possibility of Improving Air Permeability Patchwork Ski Jumping Suit Aerodynamics

    KATAOKA Yuki, HASEGAWA Hiroaki, MURAKAMI Masahide, SEO Kazuya, OBAYASHI Shigeru

    The Proceedings of the Symposium on sports and human dynamics　2020　B-5-3　2020

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmeshd.2020.b-5-3 　

    eISSN： 2432-9509

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    Ski jumping is a sport in which the competitor is judged based on the flight form and flight distance; therefore, ski jumpers attempt to fly as far as possible upon take-off. In general, the ski jumping suit fabric with lower air permeability is considered to be advantageous in lift generation. According to the rules and regulations for ski jumping competitions, the outstretched fabric should have a minimum air permeability of 40 L/m2/s at a water pressure of 98 Pa (10 mmAq). The purpose of this study is to investigate the effect of fabric air permeability on aerodynamic characteristics of ski jumping suits. In this study, wind tunnel experiments were carried out on an elliptic cylinder clothed with ski jumping suit fabrics of different air permeability and with two types of modified fabric made by combining different air permeability (patchwork fabric). The aerodynamic forces acting on the fabric-clothed elliptic cylinder were measured using a three component force balance. The significant lift enhancement occurs and the maximum lift coefficient shows a remarkable increase for the patchwork fabric with high air permeability placed at the front side on the upper surface of the elliptic cylinder.

  47. Drag Coefficients of Circular Cylinders with Fineness Ratios of less than 0.50 measured by 0.1 and 0.3 m Magnetic Suspension and Balance Systems Peer-reviewed

    Masahide Kuwata, Sho Yokota, Hideo Sawada, Yoshiaki Abe, Aiko Yakeno, Taku Nonomura, Keisuke Asai, Shigeru Obayashi

    AIAA Scitech 2020 Forum　1325　2020/01

    Publisher: American Institute of Aeronautics and Astronautics

    DOI： 10.2514/6.2020-1325 　

  48. Numerical Investigation of Geometrical Corrugation Influence to Vortex Flowfields at Low Reynolds Number Peer-reviewed

    Yuya Yamaguchi, Daisuke Sasaki, Masato Okamoto, Koji Shimoyama, Shigeru Obayashi

    Journal of Fluid Science and Technology　14　(3)　JFST0018　2019/12

    DOI： 10.1299/jfst.2019jfst0018 　

  49. EFFECT OF SPAN-WISE AND CHORD-WISE FLEXIBILITY IN A FLAPPING FLIGHT Peer-reviewed

    T.Ishide, S.Otsubo, Y.Takagi, K.Shimoyama, S.Obayashi

    The 30th International Symposium on Transport Phenomena (ISTP30)　2019/11

  50. 機械工学とインフォマティクスの出会い

    大林茂

    日本機械学会誌　122　(1210)　4-5　2019/09/05

  51. Measurements of Aerodynamic Characteristics of Turbo-Javs Using a Magnetic Suspension and Balance System

    SASAKI Kasumi, KONISHI Yasuhumi, OKUIZUMI Hiroyuki, OBAYASHI Shigeru

    The Proceedings of the Symposium on sports and human dynamics　2019　(0)　B-1　2019

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmeshd.2019.B-1 　

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    <p>The aerodynamic coefficients of the turbo-jav (a short javelin for junior or disabled athletes) up to 26 degree angle of attack were obtained using Magnetic Suspension and Balance System (MSBS). Ordinary thin models are susceptible to interference caused by mechanical supports. However, MSBS can eliminate the support interference because the model is floating supported by magnetic force instead of mechanical supports. Drag, lift force and pitching moment coefficients were measured in the wind tunnel tests at the wind speed 25 m/s (Re = 6.4 × 104) from 0 to 26 degrees angle of attack. This experiment agreed well with the results of the calculation using ANSYS FLUENT. Especially for pitching moments, the present measurement agreed the calculation better than the previous results using mechanical supports. It suggested that the results using MSBS was more reliable. In addition, the experimental results suggested that the aerodynamic characteristics of the turbo-jav depended on the fins of the turbo-jav but not on the rotation angle around air flow axis of the turbo-jav.</p>

  52. Measurement of aerodynamics forces acting on a javelin by using a magnetic suspension balance system

    KOBAYASHI Takuto, OBAYASHI Shigeru, SEO Kazuya, KANEDA Shoya, SASAKI Kasumi, SHINJI Kento, OYAMA Shogo, OKUIZUMI Hiroyuki, KONISHI Yasufumi, HASEGAWA Hiroaki

    The Proceedings of the Symposium on sports and human dynamics　2019　(0)　B-5　2019

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmeshd.2019.B-5 　

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    <p>Using the world's largest 1-m MSBS (Magnetic Suspension and Balance System) and low-turbulence wind tunnel at Tohoku University, we successfully measured the aerodynamics force acting on a non-spinning women's javelin with no supporting rod. The primary advantage of the MSBS is the complete elimination of any support, which can interference with the measurements. The advantage of the world's largest 1m-MSBS at Tohoku University is that it is possible to employ a real javelin at relatively high AoA. A women's javelin was used for the wind tunnel tests. It was found that the drag and the Lift increase with increasing the angle of attack up to 18 °. The pitching moment increases up to about 9 °, and it decreases up to 18 °. The pitching moment becomes negative above 12 °. The nose-up rotation was determined as positive. We also confirmed the support interferences with using a pseudo supporting rod. The tip of the pseudo supporting rod was set at the distance of 2 mm away from the surface of the javelin at the angle of attack of 0 °.It was confirmed that there are some differences between the aerodynamics forces with the pseudo supporting rod and those without it. The absolute aerodynamic forces without the pseudo supporting rod become smaller.</p>

  53. フィルム冷却効率予測のためのベイジアンモデル較正 Peer-reviewed

    三坂孝志, 淺海典男, 出田武臣, 大林茂

    日本ガスタービン学会　47　(2)　113-121　2019

  54. Influence of Turbulence Statistics on Stochastic Jet-Noise Prediction with Synthetic Eddy Method Peer-reviewed

    Shiku Hirai, Yuma Fukushima, Shigeru Obayashi, Takashi Misaka, Daisuke Sasaki, Yuya Ohmichi, Masashi Kanamori, Takashi Takahashi

    Journal of Aircraft　56　(6)　2342-2356　2019

    Publisher: American Institute of Aeronautics and Astronautics (AIAA)

    DOI： 10.2514/1.C035465 　

    eISSN： 1533-3868

  55. Active Stall Control System on NACA0012 by Using Synthetic Jet Actuator Peer-reviewed

    Hiroaki Hasegawa, Shigeru Obayashi

    Journal of Flow Control, Measurement & Visualization (JFCMV)　1　(7)　61-72　2019/01

  56. Stochastic tsunami inundation flow simulation via polynomial chaos approach Peer-reviewed

    Wataru YAMAZAKI, Tatsuya KATO, Tsubasa HOMMA, Koji SHIMOYAMA, Shigeru OBAYASHI

    Journal of Fluid Science and Technology　13　(4)　2018/11/09

  57. Aerodynamic drag reduction using a coating material in flapping wing

    Tadateru ISHIDE, Motoki Kimura, Ryo FUJII, Tomoharu KAERIYAMA, Koji SHIMOYAMA, Shigeru OBAYASHI

    Proc. of the 18th International Sympo. on Advanced Fluid Information　14-15　2018/11

  58. Introduction of 1-m MSBS in Tohoku University, New Device for Aerodynamics Measurements of the Sports Equipment Peer-reviewed

    Hiroyuki Okuizumi, Hideo Sawada, Hayato Nagaike, Yasufumi Konishi, Shigeru Obayashi

    Proceedings　2　(6)　273-273　2018/02/13

    Publisher: {MDPI} {AG}

    DOI： 10.3390/proceedings2060273 　

  59. Introduction of 1-m MSBS in Tohoku University, New Device for Aerodynamics Measurements of the Sports Equipment Peer-reviewed

    Hiroyuki Okuizumi, Hideo Sawada, Hayato Nagaike, Yasufumi Konishi and Shigeru Obayashi

    Proceedings of The 12th Conference of the International Sports Engineering Association　2(6)　(273)　1-7　2018/02/13

  60. Effect of Camber on Badminton Shuttlecock Peer-reviewed

    Yasufumi Konishi, Yusuke Matsushima, Takashi Misaka, Hiroyuki Okuizumi, Kensuke Tanaka and Shigeru Obayashi

    Proceedings of The 12th Conference of the International Sports Engineering Association　2(6)　(266)　1-7　2018/02/11

  61. Effect of Camber on Badminton Shuttlecock Peer-reviewed

    Yasufumi Konishi, Yusuke Matsushima, Takashi Misaka, Hiroyuki Okuizumi, Kensuke Tanaka, Shigeru Obayashi

    Proceedings　2　(6)　266　2018/02

  62. Effect of Air Permeability on the Aerodynamic Characteristics of Ski Jumping Suits

    HASEGAWA Hiroaki, KAWABATA Yosuke, MURAKAMI Masahide, SEO Kazuya, OBAYASHI Shigeru

    Advanced Experimental Mechanics　3　(0)　118-122　2018

    Publisher: 日本実験力学会

    DOI： 10.11395/aem.3.0_118 　

    ISSN： 2189-4752

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    &lt;p&gt;The aerodynamic characteristics of sports suits play a crucial role in helping professional athletes gain a competitive edge in their chosen sport. The fluid forces acting on the body of the sports competitor are influenced by the surface topology of the fabric, position and size of the seams, use of fasteners, and air permeability of the fabric. Wind tunnel experiments and numerical simulations provide deep insight on the aerodynamic characteristics of sports suit designs. Ski jumping is a sport in which the competitor is judged based on the flight form and flight distance; therefore, ski jumpers attempt to fly as far as possible upon take-off. The fabric used for ski jumping suits plays a crucial role in achieving favorable aerodynamic characteristics. According to the rules and regulations for ski jumping competitions, the outstretched fabric should have a minimum air permeability of 40 L/m&lt;sup&gt;2&lt;/sup&gt;/s at a water pressure of 98 Pa (10 mmAq). To date, little is known regarding the effects of air permeability on the aerodynamic characteristics of ski jumping suits, which forms the motivation of this study. The purpose of this study is to investigate the effect of air permeabi

  63. Relationship between Air Permeability and Aerodynamic Characteristics of Ski Jumping Suit Fabric

    MAETA Ryusei, HASEGAWA Hiroaki, MURAKAMI Masahide, Seo Kazuya, OBAYASHI Shigeru

    The Proceedings of the Symposium on sports and human dynamics　2018　(0)　C-1　2018

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmeshd.2018.C-1 　

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    &lt;p&gt;In ski jumping competition, there are many regulations to ensure fairness. In the international ski jumping competition rules, suit fabric must show the air permeability of a minimum of 40 liters per m2/sec under 10 mm water pressure. However, the effect of air permeability of suit fabric on aerodynamic characteristics has not been completely clarified yet. The purpose of this study is to investigate the effect of air permeability of suit fabric on aerodynamic characteristics. The fabrics with different air permeability are used and the wind tunnel experiments were carried out using the fabric clothed elliptic cylinder. The experimental results show that the stall characteristics are greatly affected by the air permeability. Furthermore, the flow around the fabric-clothed elliptic cylinder also varies, depending on the position of the fabric&#039;s air permeability on the upper surface of the elliptic cylinder. It is presumed that the aerodynamic performance of ski jumpers during a flight can be improved by adjusting the air permeability of the suit fabric.&lt;/p&gt;

  64. Study on Air Permeability Patchwork Ski Jumping Suit

    KAWBATA Yosuke, HASEGAWA Hiroaki, MURAKAMI Masahide, SEO Kazuya, OBAYASHI Shigeru

    The Proceedings of Conference of Kanto Branch　2018　(0)　2018

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmekanto.2018.24.OS0521 　

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    &lt;p&gt;The aerodynamic characteristics of the sports suit play an important role in the victory or defeat of sports. Furthermore, the fluid forces acing on the body of the player are influenced by a surface shape of the cloth for suit, a position or the fastener, and the air permeability. Therefore, a wind tunnel examination and numerical analysis for the design of the suit greatly contributes to these sports. Ski jumping is a sport which competes the flight distance and the flight form, and jumpers attempt to fly as far as possible. The fabric used in ski jumping plays an important role to obtain aerodynamic benefits. In the regulations for ski jumping competition, the outstretched fabric must show a medium air permeability of a minimum of 40 L/m2/sec with 10 mm water pressure. However, the effect of the air permeability of ski jumping suits on aerodynamic characteristics has not been completely clarified yet. The purpose of this study is to investigate the effect of air permeability of jumping suit fabric on aerodynamic characteristics, and four types of fabric with different air permeability are considered from aerodynamic point of view. The wind tunnel experiments were carried out

  65. Large eddy simulation of wake vortices under influences of hangar wake and the ground

    Takashi Misaka, Ryoichi Yoshimura, Shigeru Obayashi, Naoki Matayoshi

    2018 Atmospheric and Space Environments Conference　2018

    DOI： 10.2514/6.2018-2864 　

  66. Aerodynamic analysis of NASA common research model by block-structured cartesian mesh Peer-reviewed

    Shinya Makino, Takaya Kojima, Takashi Misaka, Shigeru Obayashi, Daisuke Sasaki

    AIAA Aerospace Sciences Meeting, 2018　(210059)　2018

    Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA

    DOI： 10.2514/6.2018-0543 　

  67. Change-point detection between two unsteady computational fluid dynamics simulation results by sparse structure learning Peer-reviewed

    Nobuyuki Isoshima, Koji Shimoyama, Shigeru Obayashi

    AIAA Aerospace Sciences Meeting, 2018　(210059)　2018

    Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA

    DOI： 10.2514/6.2018-1170 　

  68. Aerodynamic measurements of AGARD-B model at high angles of attack by 1-m magnetic suspension and balance system Peer-reviewed

    Hiroki Senda, Hideo Sawada, Hiroyuki Okuizumi, Yasufumi Konishi, Shigeru Obayashi

    AIAA Aerospace Sciences Meeting, 2018　(210059)　2018

    Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA

    DOI： 10.2514/6.2018-0302 　

  69. BCM-TASカップリングソルバーを用いたNASA CRMの空力解析 Invited Peer-reviewed

    牧野真弥, 三坂孝志, 大林茂, 廣瀬拓也, 佐々木大輔

    航空宇宙技術　17　199-208　2018

    DOI： 10.2322/astj.JSASS-D-17-00038 　

  70. Effect of Mach number on airfoil characteristics at Reynolds number of 3,000 Peer-reviewed

    Seiichiro Morizawa, Taku Nonomura, Akira Oyama, Kozo Fujii, Shigeru Obayashi

    Transactions of the Japan Society for Aeronautical and Space Sciences　61　(6)　258-267　2018

    DOI： 10.2322/tjsass.61.258 　

    ISSN： 0549-3811

  71. Expected Improvement of Penalty-Based Boundary Intersection for Expensive Multiobjective Optimization Peer-reviewed

    Nobuo Namura, Koji Shimoyama, Shigeru Obayashi

    IEEE TRANSACTIONS ON EVOLUTIONARY COMPUTATION　21　(6)　898-913　2017/12

    DOI： 10.1109/TEVC.2017.2693320 　

    ISSN： 1089-778X

    eISSN： 1941-0026

  72. Adaptive mesh refinement and load balancing based on multi-level block-structured Cartesian mesh Peer-reviewed

    Takashi Misaka, Daisuke Sasaki, Shigeru Obayashi

    International Journal of Computational Fluid Dynamics　31　(10)　476-487　2017/11/26

    DOI： 10.1080/10618562.2017.1390085 　

    ISSN： 1029-0257 1061-8562

  73. Streamline selection for comparative visualization of 3D fluid simulation result Peer-reviewed

    Shoko Sawada, Takayuki Itoh, Takashi Misaka, Shigeru Obayashi, Tobias Czauderna, Kingsley Stephens

    Proceedings - 2017 21st International Conference Information Visualisation, iV 2017　268-273　2017/11/14

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/iV.2017.60 　

  74. Numerical study on jet-wake vortex interaction of aircraft configuration Peer-reviewed

    Takashi Misaka, Shigeru Obayashi

    AEROSPACE SCIENCE AND TECHNOLOGY　70　615-625　2017/11

    DOI： 10.1016/j.ast.2017.08.038 　

    ISSN： 1270-9638

    eISSN： 1626-3219

  75. Effectiveness of flexible wing in a flapping flight Peer-reviewed

    ISHIDE Tadateru, OBAYASHI Shigeru, NAKANO Kodai, SHIMOYAMA Koji, KAERIYAMA Tomoharu

    Proc. of the 17th International Symp. on Advanced Fluid Information　24-25　2017/11

  76. Effectiveness of flexible wing in a flapping flight Peer-reviewed

    ISHIDE Tadateru, OBAYASHI Shigeru, NAKANO Kodai, SHIMOYAMA Koji, KAERIYAMA Tomoharu

    Proc. of the 9th JSME-KSME thermal and fluids engineering conference(Okinawa)　1-5　2017/10

  77. Kriging surrogate model with coordinate transformation based on likelihood and gradient Peer-reviewed

    Nobuo Namura, Koji Shimoyama, Shigeru Obayashi

    JOURNAL OF GLOBAL OPTIMIZATION　68　(4)　827-849　2017/08

    DOI： 10.1007/s10898-017-0516-y 　

    ISSN： 0925-5001

    eISSN： 1573-2916

  78. Aerodynamic stability of a badminton shuttlecock

    NAKAGAWA Kenichi, HASEGAWA Hiroaki, MURAKAMI Masahide, OBAYASHI Shigeru

    Transactions of the JSME (in Japanese)　2017

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/transjsme.17-00165 　

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    <p>Badminton is one of the most popular sports in the world and is famous as the sport having the fastest initial velocity of a batted ball among all ball games. Initial velocity immediately after smashing may reach up to 408 km/h (113 m/s) at maximum. A badminton shuttlecock generates significant aerodynamic drag and it was confirmed that the high deceleration characteristics was related to the slots located at the leg portion of a shuttlecock in the previous study. Turnover refers to the flipping experienced by a shuttlecock when undergoing heading change from nose pointing against the flight path at the moment of impact and a shuttlecock indicates the aerodynamically stable feature for the flip movement just after impact. The purpose of this study is to investigate the effect of gaps on the aerodynamic stability (turnover stability) of a badminton shuttlecock during the flip phenomenon. In the present study, the flow field around the shuttlecock during impulsive change of an angle of attack (flip movement) was measured by using the smoke flow visualization and the behavior of the shuttlecock during the flip movement was evaluated in comparison with that of the conic model (with no gaps). The turnover stability of a badminton shuttlecock is affected by gaps of the shuttlecock skirt.</p>

  79. Application of immersed boundary method with wall injection for solid rocket motor internal flow

    Takuya Hirose, Shinichiro Ogawa, Daisuke Sasaki, Yuma Fukushima, Shigeru Obayashi

    AIAA Modeling and Simulation Technologies Conference, 2017　2017

    DOI： 10.2514/6.2017-1944 　

  80. Large eddy simulation of wake vortices in ground effect with realistic terrain around airport

    Takashi Misaka, Shigeru Obayashi

    9th AIAA Atmospheric and Space Environments Conference, 2017　2017

    DOI： 10.2514/6.2017-4371 　

  81. Topology and sizing optimization of micromixers using graphtheoretical representaion and genetic algorithm Peer-reviewed

    Mitsuo Yoshimura, Koji Shimoyama, Takashi Misaka, Shigeru Obayashi

    Proceedings of the ASME Design Engineering Technical Conference　2　2017

    Publisher: American Society of Mechanical Engineers (ASME)

    DOI： 10.1115/DETC201767745 　

  82. Effects of uncertainties in atmospheric turbulence and weather predictions on sonic boom Peer-reviewed

    Kuninori Fujino, Ryota Kikuchi, Koji Shimoyama, Shigeru Obayashi, Yoshikazu Makino

    AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting　2017

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2017-0280 　

  83. Computational analysis of thin airfoilsunder low-reynolds number flow using block-structured cartesian mesh Peer-reviewed

    Daiki Iioka, Kazuki Fukuda, Masato Okamoto, Daisuke Sasaki, Koji Shimoyama, Shigeru Obayashi

    AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting　2017

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2017-0546 　

  84. Numerical simulation of cascade flows using block-structured cartesian mesh Peer-reviewed

    Masaki Koike, Takaya Kojima, Daisuke Sasaki, Takashi Misaka, Koji Shimoyama, Shigeru Obayashi, Karin Hirakawa, Naoki Tani

    AIAA SciTech Forum - 55th AIAA Aerospace Sciences Meeting　2017

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2017-1925 　

  85. Multi-objective optimization for resin transfer molding process Peer-reviewed

    Tomonaga Okabe, Yutaka Oya, Go Yamamoto, Junki Sato, Tsubasa Matsumiya, Ryosuke Matsuzaki, Shigeki Yashiro, Shigeru Obayashi

    Composites Part A: Applied Science and Manufacturing　92　1-9　2017/01/01

    Publisher: Elsevier Ltd

    DOI： 10.1016/j.compositesa.2016.09.023 　

    ISSN： 1359-835X

  86. Topology optimization of fluid problems using genetic algorithm assisted by the Kriging model Peer-reviewed

    M. Yoshimura, K. Shimoyama, T. Misaka, S. Obayashi

    INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING　109　(4)　514-532　2017/01

    DOI： 10.1002/nme.5295 　

    ISSN： 0029-5981

    eISSN： 1097-0207

  87. 30 Years of CFD Symposium : What Have Been Done, What Have Not Been Done Peer-reviewed

    36　(2)　61-68　2017

    Publisher:

    ISSN： 0286-3154

  88. Three-dimensional shock wave distortion in shock-square vortex loop interaction Peer-reviewed

    Takahiro Ukai, Hossein Zare-Behtash, Konstantinos Kontis, Shigeru Obayashi

    EXPERIMENTAL THERMAL AND FLUID SCIENCE　79　85-90　2016/12

    DOI： 10.1016/j.expthermflusci.2016.06.028 　

    ISSN： 0894-1777

    eISSN： 1879-2286

  89. Turbulent jet interaction with a long rise-time pressure signature Peer-reviewed

    Takahiro Ukai, Kiyonobu Ohtani, Shigeru Obayashi

    APPLIED ACOUSTICS　114　179-190　2016/12

    DOI： 10.1016/j.apacoust.2016.07.015 　

    ISSN： 0003-682X

    eISSN： 1872-910X

  90. Feasibility of skin-friction diagnostics based on surface pressure gradient field Peer-reviewed

    Tianshu Liu, Takashi Misaka, Keisuke Asai, Shigeru Obayashi, Jie-Zhi Wu

    MEASUREMENT SCIENCE AND TECHNOLOGY　27　(12)　2016/12

    DOI： 10.1088/0957-0233/27/12/125304 　

    ISSN： 0957-0233

    eISSN： 1361-6501

  91. Efficient Global Optimization of Vortex Generators on a Supercritical Infinite Wing Peer-reviewed

    Nobuo Namura, Shigeru Obayashi, Shinkyu Jeong

    JOURNAL OF AIRCRAFT　53　(6)　1670-1679　2016/11

    DOI： 10.2514/1.C033753 　

    ISSN： 0021-8669

    eISSN： 1533-3868

  92. Wavenumber Optimized Immersed Boundary Method for Aeroacoustic Analysis Based on Cartesian Mesh Peer-reviewed

    Yuma Fukushima, Takashi Misaka, Shigeru Obayashi, Daisuke Sasaki, Kazuhiro Nakahashi

    AIAA JOURNAL　54　(10)　2988-3001　2016/10

    DOI： 10.2514/1.J053958 　

    ISSN： 0001-1452

    eISSN： 1533-385X

  93. Development of Magnetic Suspension and Balance System for Intermittent Supersonic Wind Tunnels Peer-reviewed

    Yoshiki Takagi, Hideo Sawada, Shigeru Obayashi

    AIAA JOURNAL　54　(4)　1277-1286　2016/04

    DOI： 10.2514/1.J054411 　

    ISSN： 0001-1452

    eISSN： 1533-385X

  94. Plate-Angle Effects on Acoustic Waves from Supersonic Jets Impinging on Inclined Plates Peer-reviewed

    Taku Nonomura, Hironori Honda, Yuki Nagata, Makoto Yamamoto, Seiichiro Morizawa, Shigeru Obayashi, Kozo Fujii

    AIAA JOURNAL　54　(3)　816-827　2016/03

    DOI： 10.2514/1.J054152 　

    ISSN： 0001-1452

    eISSN： 1533-385X

  95. A study on the exhaust heat characteristics from a wing surface depending on the airfoil shape at low reynolds number

    Kazumasa Kamisori, Koji Shimoyama, Shigeru Obayashi

    AIAA Atmospheric Flight Mechanics Conference　2016

    Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA

    DOI： 10.2514/6.2016-1757 　

  96. Electron density measurements behind a hypersonic shock wave in argon

    YAMADA Gouji, KAWAZOE Hiromitsu, OBAYASHI Shigeru

    Journal of Fluid Science and Technology　11　(1)　JFST0005-JFST0005　2016

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jfst.2016jfst0005 　

    ISSN： 1880-5558

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    The purpose of the research is to characterize the ionization process behind a shock wave with precursor photoionization in argon. In this study, the H-β line is observed by spectroscopic measurements using a hypersonic shock tube and the Stark broadening of the H- β line is evaluated to obtain the electron density behind a shock wave. As a result, the electron density is on the order of 1021 m-3 and tends to decrease with increasing the distance from the shock front. The decrease of the measured electron density is caused by the radiative energy loss from the test gas because the radiative energy loss corresponds to a decrease of the temperature or the density of the test gas, both of which can decrease the electron density. Previous study showed that photoionization occurred ahead of the shock wave, making use of the radiation energy emitted from the region behind the shock wave. The fact might be related to the radiative energy loss obtained in the present study. From the present study, it is found that the radiative energy loss is dominant behind the shock wave under the condition that precursor photoionization occurs ahead of the shock wave. In future, we should investigate the radiative transfer phenomena around the shock wave for further clarification.

  97. The effect of chamber on Badminton shuttlecock

    KONISHI Yasufumi, MATSUSHIMA Yusuke, MISAKA Takashi, OKUIZUMI Hiroyuki, TANAKA Kensuke, OBAYASHI Shigeru

    The Proceedings of the Symposium on sports and human dynamics　2016　(0)　C-14　2016

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmeshd.2016.C-14 　

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    <p>An experimental study and a computational study are conducted to understand the aerodynamics of the shuttlecock especially about the effect of the chamber of the blade. The lift, drag, pitching moment coefficient is measured in the experiment. It was found that the chamber of the blade can change the aerodynamic properties. The increase in camber causes increase in lift and a decrease in drag. PIV measurements revealed that this decrease in the drag is related to the decrease in the width of wake which is caused by the flow of outside of the shuttle flows along the chamber. A pressure coefficient calculated by CFD reveal that the each blade work as single blade at low angle of attack. On the other hand, at high angle of attack, not so high lift was observed. It is because the front of the outside of the upper blade is inside of the separation region from the cork.</p>

  98. Uncertainly quantification of lidar-derived wake vortex parameters with/without data assimilation

    Takashi Misaka, Shigeru Obayashi, Shinkyu Jeong

    8th AIAA Atmospheric and Space Environments Conference　2016

  99. Topology optimization using a kriging-assisted genetic algorithm with a novel level set representation approach Peer-reviewed

    Mitsuo Yoshimura, Koji Shimoyama, Takashi Misaka, Shigeru Obayashi

    ECCOMAS Congress 2016 - Proceedings of the 7th European Congress on Computational Methods in Applied Sciences and Engineering　2　3361-3376　2016

    Publisher: National Technical University of Athens

    DOI： 10.7712/100016.2040.8471 　

  100. Control of Karman Vortex Street behind a Thin Airfoil at Low Reynolds Number Peer-reviewed

    Shohei Takagi, Yasufumi Konishi, Shigeru Obayashi, Masahito Asai

    Journal of Flow Control, Measurement & Visualization　4　(03)　114-123　2016/01

  101. International journal of computational fluid dynamics real-time prediction of unsteady flow based on POD reduced-order model and particle filter Peer-reviewed

    Ryota Kikuchi, Takashi Misaka, Shigeru Obayashi

    INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS　30　(4)　285-306　2016

    DOI： 10.1080/10618562.2016.1198782 　

    ISSN： 1061-8562

    eISSN： 1029-0257

  102. Multiobjective Design Exploration of Propeller Airfoils at Low-Reynolds and High-Mach Numbers Conditions towards the Mars Airplane, Peer-reviewed

    S. Morizawa, T. Nonomura, A.Oyama, S. Obayashi, K. Fujii

    Transaction of the Japan Society for Aeronautical Sciences, Aerospace Technology Japan, Aerospace Technology　14　(ists30)　Pk_47-Pk_53　2016

    DOI： 10.2322/tastj.14.Pk_47 　

  103. Plate-Angle Effects on Acoustic Waves from Supersonic Jets Impinging on Inclined Plates Peer-reviewed

    T.Nonomura, H.Honda, Y.Nagata, M.Yamamoto, S.Morizawa, S.Obayashi, K.Fujii

    AIAA JOURNAL　53　(12)　1-21　2015/12

  104. Optimization of influential factors for practical application of an ornithopter Peer-reviewed

    ISHIDE Tadateru, NAGANUMA Kazuya, FUJII Ryo, MAENO Kazuo, OBAYASHI Shigeru, SHIMOYAMA Koji

    Proc. of the 15th International Symp. on Advanced Fluid Information　22-23　2015/10

  105. Fluid Force and PIV Measurements around a Flapping Elliptical Wing Peer-reviewed

    ISHIDE Tadateru, SEIJI Shinsuke, ISHIKAWA Hiroyuki, NAGANUMA Kazuya, FUJIMOTO Sumika, FUJII Ryo, MAENO Kazuo, SHIMOYAMA Koji, OBAYASHI Shigeru

    Transactions of the Visualization Society of Japan　35　(10)　37-43　2015/10

    Publisher: The Visualization Society of Japan

    DOI： 10.3154/tvsj.35.37 　

    ISSN： 1346-5260

    More details Close

    Recently, various studies of Micro Air Vehicle (MAV) and Unmanned Air Vehicle (UAV) have been reported from wide range points of view. The aim of this study is to research the aerodynamic improvement of a flapping wing in low Reynold's number region to develop an applicative these air vehicle. The six kinds of elliptical wings made of stainless steel are used in the flapping wing. The effects of flapping amplitude and wing configuration regarding the aerodynamic characteristics are investigated in detail. The fluid force measurement by six component load cell and PIV analysis are performed as the experimental method. In the flapping wing experiment, the simultaneous measuring of the fluid force measurement and PIV analysis is tried by using the trigger signal from the encoder attached to the flapping model. The relations between the aerodynamic superiority and the vortex behavior around the models are demonstrated.

  106. Assessment of probability density function based on POD reduced-order model for ensemble-based data assimilation Peer-reviewed

    Ryota Kikuchi, Takashi Misaka, Shigeru Obayashi

    FLUID DYNAMICS RESEARCH　47　(5)　051403-1-051403-22　2015/10

    DOI： 10.1088/0169-5983/47/5/051403 　

    ISSN： 0169-5983

    eISSN： 1873-7005

  107. Computational study of compound angle film cooling flow field and aerodynamic losses using a parallel hybrid mesh Navier-Stokes code Peer-reviewed

    Chang Luo, Takashi Misaka, Shigeru Obayashi, Takashi Goto, Ruriko Yamawaki

    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY　229　(6)　597-612　2015/09

    DOI： 10.1177/0957650915590907 　

    ISSN： 0957-6509

    eISSN： 2041-2967

  108. Transverse jet-cavity interactions with the influence of an impinging shock Peer-reviewed

    H. Zare-Behtash, K. H. Lo, K. Kontis, T. Ukai, S. Obayashi

    International Journal of Heat and Fluid Flow　53　146-155　2015/06/01

    Publisher: Elsevier

    DOI： 10.1016/j.ijheatfluidflow.2015.03.004 　

    ISSN： 0142-727X

  109. Validation of measurement accuracy for near-field pressure around supersonic projectiles in a ballistic range Peer-reviewed

    Takahiro Ukai, Kiyonobu Ohtani, Shigeru Obayashi

    MEASUREMENT　67　24-33　2015/05

    DOI： 10.1016/j.measurement.2015.01.031 　

    ISSN： 0263-2241

    eISSN： 1873-412X

  110. Nonlinear Aeroelastic Analysis of Control Surface with Freeplay Using Computational-Fluid-Dynamics-Based Reduced-Order Models Peer-reviewed

    Hiroyuki Morino, Shigeru Obayashi

    JOURNAL OF AIRCRAFT　52　(2)　569-583　2015/03

    DOI： 10.2514/1.C032775 　

    ISSN： 0021-8669

    eISSN： 1533-3868

  111. Aerodynamic Optimization of Near-future High-wing Aircraft Peer-reviewed

    Akihiro Hashimoto, Shinkyu Jeong, Shigeru Obayashi

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　58　(2)　73-82　2015/03

    ISSN： 0549-3811

  112. A data assimilation methodology for reconstructing turbulent flows around aircraft Peer-reviewed

    Hiroshi Kato, Akira Yoshizawa, Genta Ueno, Shigeru Obayashi

    JOURNAL OF COMPUTATIONAL PHYSICS　283　559-581　2015/02

    DOI： 10.1016/j.jcp.2014.12.013 　

    ISSN： 0021-9991

    eISSN： 1090-2716

  113. Multipoint design of vortex generatorson a sweptinfinite-wingunder cruise and critical condition

    Nobuo Namura, Koji Shimoyama, Shigeru Obayashi

    33rd AIAA Applied Aerodynamics Conference　2015

    Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA

    DOI： 10.2514/6.2015-2726 　

  114. Sensitivity analysis of wake vortex parameters measured by doppler lidar

    Takashi Misaka, Shigeru Obayashi, Anton Stephan, Frank Holzäpfel, Thomas Gerz

    7th AIAA Atmospheric and Space Environments Conference, 2015　2015

    DOI： 10.2514/6.2015-3023 　

  115. Real-time prediction of low-level atmospheric turbulence

    Ryota Kikuchi, Takashi Misaka, Shigeru Obayashi

    33rd Wind Energy Symposium　2015

  116. Analysis of sonic boom propagation based on the KZK equation Peer-reviewed

    Junpei Takeno, Takashi Misaka, Koji Shimoyama, Shigeru Obayashi

    53rd AIAA Aerospace Sciences Meeting　2015

    Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA

    DOI： 10.2514/6.2015-0745 　

  117. Conference Report on 2015 IEEE Congress on Evolutionary Computation (IEEE CEC 2015) [Conference Reports] Peer-reviewed

    Shigeru Obayashi, Carlo Poloni

    IEEE Computational Intelligence Magazine　10　(4)　4-5　2015

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/MCI.2015.2472097 　

    ISSN： 1556-603X

  118. Effects of the Number of Design Variables on Performances in Kriging-Model-Based Many-Objective Optimization Peer-reviewed

    Chang Luo, Koji Shimoyama, Shigeru Obayashi

    2015 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION (CEC)　1901-1908　2015

  119. Kriging Surrogate Model Enhanced by Coordinate Transformation of Design Space Based on Eigenvalue Decomposition Peer-reviewed

    Nobuo Namura, Koji Shimoyama, Shigeru Obayashi

    EVOLUTIONARY MULTI-CRITERION OPTIMIZATION, PT I　9018　321-335　2015

    DOI： 10.1007/978-3-319-15934-8_22 　

    ISSN： 0302-9743

  120. Evolutionary Algorithm with Parallel Evaluation Strategy of Feasible and Infeasible Solutions Considering Total Constraint Violation Peer-reviewed

    Taiga Kato, Koji Shimoyama, Shigeru Obayashi

    2015 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION (CEC)　986-993　2015

  121. A Study on Many-Objective Optimization Using the Kriging-Surrogate-Based Evolutionary Algorithm Maximizing Expected Hypervolume Improvement Peer-reviewed

    Chang Luo, Koji Shimoyama, Shigeru Obayashi

    MATHEMATICAL PROBLEMS IN ENGINEERING　2015　2015

    DOI： 10.1155/2015/162712 　

    ISSN： 1024-123X

    eISSN： 1563-5147

  122. Filtering Algorithm of Airborne Doppler Lidar Measurements for Improved Wind Estimation Peer-reviewed

    Takashi Misaka, Fabio K. Nakabayashi, Shigeru Obayashi, Hamaki Inokuchi

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　58　(3)　149-155　2015

    DOI： 10.2322/tjsass.58.149 　

    ISSN： 0549-3811

  123. Effects of dual jets distance on mixing characteristics and flow path within a cavity in supersonic crossflow Peer-reviewed

    Takahiro Ukai, Hossein Zare-Behtash, Kin Hing Lo, Konstantinos Kontis, Shigeru Obayashi

    INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW　50　254-262　2014/12

    DOI： 10.1016/j.ijheatfluidflow.2014.08.009 　

    ISSN： 0142-727X

    eISSN： 1879-2278

  124. EVOLVE: A visualization tool for multi-objective optimization featuring linked view of explanatory variables and objective functions Peer-reviewed

    Maki Kubota, Takayuki Itoh, Shigeru Obayashi, Yuriko Takeshima

    Proceedings of the International Conference on Information Visualisation　351-356　2014/09/18

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/IV.2014.43 　

    ISSN： 1093-9547

  125. On two optomechanical effects of laser-induced electrostriction in dielectric liquids Peer-reviewed

    Ardian B. Gojani, Rasim Bejtullahu, Shigeru Obayashi

    JAPANESE JOURNAL OF APPLIED PHYSICS　53　(9)　2014/09

    DOI： 10.7567/JJAP.53.092703 　

    ISSN： 0021-4922

    eISSN： 1347-4065

  126. Topological approach to multisensory realization of wake turbulence Invited

    TAKESHIMA Yuriko, MISAKA Takashi, OBAYASHI Shigeru, HOLZ'APFEL Frank, KATO Hiroshi, TAKAHASHI Shigeo, FUJISHIRO Issei

    Aviation 2014　2014/06/17

    Publisher: AIAA

    DOI： 10.2514/6.2014-2335 　

  127. A-1 Aerodynamics Study of Fabrics of a Ski Jumpsuit with Different Air Permeability

    TEKURAMORI Shigekazu, HASEGAWA Hiroaki, MURAKAMI Masahide, SEO Kazuya, OBAYASHI Shigeru

    The Proceedings of the Symposium on sports and human dynamics　2014　_A-1-1_-_A-1-4_　2014

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmeshd.2014._a-1-1_ 　

    eISSN： 2432-9509

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    Ski jumping is a sport which competes the flight distance and the flight form, and jumpers attempt to fly as far as possible. In the regulations for ski jumping competition, the outstretched fabric must show a medium air permeability of a minimum of 40 liters per m^2/sec with 10 mmAq differential pressure. However, the effect of the air permeability of ski jumping suits on aerodynamic characteristics has not been completely clarified yet. The purpose of this study is to investigate the effect of air permeability of jumpsuit fabrics on aerodynamic characteristics, and three types of fabric with different air permeability are examined from aerodynamic point of view. The wind tunnel experiments were carried out using the fabric clothed elliptic cylinder. The aerodynamic forces and static pressure distribution were measured for three types of fabric with different air permeability. For Gap-2 (high air permeability case), the angle of stall increases in contrast to the other cases. The boundary layer flow is affected by the air permeability of the fabric clothed elliptic cylinder.

  128. Aerodynamic optimization of high-wing configuration for near future aircraft

    Akihiro Hashimoto, Shigeru Obayashi, Shinkyu Jeong

    10th AIAA Multidisciplinary Design Optimization Specialist Conference　2014

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2014-0291 　

  129. Data assimilation for turbulent flows

    Hiroshi Kato, Shigeru Obayashi

    16th AIAA Non-Deterministic Approaches Conference　2014

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2014-1177 　

  130. Efficient global optimization of vortex generators on a super critical infinite-wing using Kriging-based surrogate models

    Nobuo Namura, Shigeru Obayashi, Shinkyu Jeong

    52nd Aerospace Sciences Meeting　2014

    Publisher: American Institute of Aeronautics and Astronautics Inc.

  131. Long rise-time pressure signature through jet turbulence in a laboratory-scale experiment

    Takahiro Ukai, Yuta Saito, Ko Miyakoshi, Takayoshi Yamaguchi, Kiyonobu Ohtani, Shigeru Obayashi

    29th Congress of the International Council of the Aeronautical Sciences, ICAS 2014　2014

    Publisher: International Council of the Aeronautical Sciences

  132. Sonic boom estimation using the multipole method for free-flight experiments

    Yuta Saito, Takahiro Ukai, Ko Miyakoshi, Kiyonobu Ohtani, Shigeru Obayashi

    52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014　2014

    Publisher: American Institute of Aeronautics and Astronautics Inc.

  133. Generation mechanism of precursor electrons ahead of a hypersonic shock wave in argon

    YAMADA Gouji, AGO Shota, KAWAZOE Hiromitsu, OBAYASHI Shigeru

    JFST　9　(5)　JFST0070-JFST0070　2014

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jfst.2014jfst0070 　

    ISSN： 1880-5558

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    The purpose of the research is to clarify the generation mechanism of precursor electrons ahead of a hypersonic shock wave in argon. The triple-probe measurements and radiation measurements are carried out using a hypersonic shock tube. Theoretical analysis is also carried out using a one-dimensional photoionization model. The triple-probe measurements show that the electron temperature is almost uniform ahead of the shock wave and ranges from 5000 to 11000 K. In contrast to the electron temperature, the electron density increases exponentially as approaching the shock wave and lies between 1015 and 1017 m-3. These results show that considerable electrons exist in the region ahead of the shock wave. From the radiation measurements, argon ions are found to emit radiation in the region ahead of the shock wave, showing that argon ions are generated from argon atoms by photoionization. The behavior of electron temperature and density is well accounted for by the one-dimensional photoionization model with an assumption of photoionization as the primary ionization process ahead of the shock wave. In conclusion, precursor electrons are mainly generated by photoionization, making use of the radiation energy behind the shock wave.

  134. Experimental Investigation of Impinging Shock – Cavity Interactions with Upstream Transverse Jet Injection

    ZARE-BEHTASH Hossein, LO Kin Hing, UKAI Takahiro, KONTIS Konstantinos, OBAYASHI Shigeru

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, SPACE TECHNOLOGY JAPAN　12　(29)　Pe_57-Pe_62　2014

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/tastj.12.Pe_57 　

    ISSN： 1884-0485

    More details Close

    Mixing between the injected fuel and high speed free stream air is challenging at supersonic speeds. Placing cavities downstream of injection holes or slots addresses the problem of flame holding and stabilisation, however there are still open questions related to mixing enhancement, uniformity and efficiency. The present study examines experimentally the flow field interactions due to a transverse jet - cavity combination with shock impingement at supersonic speeds using PIV, Schlieren photography, and oil flow surface visualisation. The oblique shock lifts the shear layer over the cavity and combined with the instabilities generated by the transverse jet injection creates a highly complicated flowfield with numerous vortical structures. The interaction between the oblique shock and the jet leads to a relatively uniform velocity distribution within the cavity. The lifting of the shear layer is also believed to reduce the drag created by the cavity.

  135. Numerical simulation of Jet-Wake vortex interaction

    Takashi Misaka, Shigeru Obayashi, Anton Stephan, Frank Holzäpfel, Thomas Gerz, Kazuhiro Nakahashi

    52nd Aerospace Sciences Meeting　2014

  136. Numerical simulation of jet-wake vortex interaction

    Takashi Misaka, Shigeru Obayashi, Anton Stephan, Frank Holzäpfel, Thomas Gerz, Kazuhiro Nakahashi

    52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014　2014

    DOI： 10.2514/6.2014-0926 　

  137. The numerical analysis of forward fan noise shielding effect on the Over-The-Wing Nacelle configuration

    Yuma Fukushima, Takashi Misaka, Shigeru Obayashi, Daisuke Sasaki, Kazuhiro Nakahashi

    52nd Aerospace Sciences Meeting　2014

  138. The numerical analysis of forward fan noise shielding effect on the Over-the-Wing Nacelle configuration

    Yuma Fukushima, Takashi Misaka, Shigeru Obayashi, Daisuke Sasaki, Kazuhiro Nakahashi

    52nd AIAA Aerospace Sciences Meeting - AIAA Science and Technology Forum and Exposition, SciTech 2014　2014

    DOI： 10.2514/6.2014-0720 　

  139. Effectiveness of jet location on mixing characteristics inside a cavity in supersonic flow Peer-reviewed

    Takahiro Ukai, Hossein Zare-Behtash, Erinc Erdem, Kin Hing Lo, Konstantinos Kontis, Shigeru Obayashi

    EXPERIMENTAL THERMAL AND FLUID SCIENCE　52　59-67　2014/01

    DOI： 10.1016/j.expthermflusci.2013.08.022 　

    ISSN： 0894-1777

    eISSN： 1879-2286

  140. Kriging Model Based Many-Objective Optimization with Efficient Calculation of Expected Hypervolume Improvement Peer-reviewed

    Chang Luo, Koji Shimoyama, Shigeru Obayashi

    2014 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION (CEC)　1187-1194　2014

  141. EVOLVE : A Visualization Tool for Multi-Objective Optimization Featuring Linked View of Explanatory Variables and Objective Functions Peer-reviewed

    Maki Kubota, Takayuki Itoh, Shigeru Obayashi, Yuriko Takeshima

    2014 18TH INTERNATIONAL CONFERENCE ON INFORMATION VISUALISATION (IV)　351-356　2014

    DOI： 10.1109/IV.2014.43 　

    ISSN： 1550-6037

  142. Sensitivity Analysis of Unsteady Flow Fields and Impact of Measurement Strategy Peer-reviewed

    Takashi Misaka, Shigeru Obayashi

    MATHEMATICAL PROBLEMS IN ENGINEERING　2014　359606-1-359606-12　2014

    DOI： 10.1155/2014/359606 　

    ISSN： 1024-123X

    eISSN： 1563-5147

  143. Data Assimilation for POD Reduced-Order Model - Comparison of PF and EnKF Peer-reviewed

    Ryota Kikuchi, Takashi Misaka, Shigeru Obayashi

    2014 17TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION (FUSION)　1-7　2014

  144. Vehicle Aerodynamics Simulation for the Next Generation on the K Computer: Part 2 Use of Dirty CAD Data with Modified Cartesian Grid Approach Peer-reviewed

    Keiji Onishi, Makoto Tsubokura, Shigeru Obayashi, Kazuhiro Nakahashi

    SAE International Journal of Passenger Cars - Mechanical Systems　7　(2)　528-537　2014

    Publisher: SAE International

    DOI： 10.4271/2014-01-0580 　

    ISSN： 1946-4002 1946-3995

  145. Computational Prediction of Acoustic Waves from a Subscale Rocket Motor Peer-reviewed

    T. Nonomura, S. Morizawa, S. Obayashi, K. Fujii

    Transaction of The Japan Society for Aeronautical Sciences, Aerospace Technology　12　(ists29)　Pe_11-Pe_17　2014

    DOI： 10.2322/tastj.12.Pe_11 　

  146. Global Sonic Boom Overpressure Variation from Seasonal Temperature, Pressure, and Density Gradients Peer-reviewed

    Hiroshi Yamashita, Shigeru Obayashi

    JOURNAL OF AIRCRAFT　50　(6)　1933-+　2013/11

    DOI： 10.2514/1.C031339 　

    ISSN： 0021-8669

    eISSN： 1533-3868

  147. Simultaneous visualization of surface and flow field for a projectile Peer-reviewed

    Takahiro Ukai, Takamasa Kikuchi, Kiyonobu Ohtani, Shigeru Obayashi

    JOURNAL OF VISUALIZATION　16　(4)　331-340　2013/11

    DOI： 10.1007/s12650-013-0174-1 　

    ISSN： 1343-8875

    eISSN： 1875-8975

  148. Preface Peer-reviewed

    Shigeru Obayashi, Yoshiaki Tamura, Koji Miyaji, Eiji Shima

    Computers and Fluids　85　1　2013/10/01

    DOI： 10.1016/j.compfluid.2012.11.003 　

    ISSN： 0045-7930

  149. Wavelet-based data compression for flow simulation on block-structured Cartesian mesh Peer-reviewed

    Ryotaro Sakai, Daisuke Sasaki, Shigeru Obayashi, Kazuhiro Nakahashi

    INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS　73　(5)　462-476　2013/10

    DOI： 10.1002/fld.3808 　

    ISSN： 0271-2091

  150. Approach for uncertainty of turbulence modeling based on data assimilation technique Peer-reviewed

    Hiroshi Kato, Shigeru Obayashi

    COMPUTERS & FLUIDS　85　2-7　2013/10

    DOI： 10.1016/j.compfluid.2012.09.002 　

    ISSN： 0045-7930

  151. Identification of discontinuities in plasma plume evolution Peer-reviewed

    Ardian B. Gojani, Jahja Kokaj, Shigeru Obayashi

    Applied Physics B: Lasers and Optics　112　(4)　571-577　2013/09

    DOI： 10.1007/s00340-013-5440-3 　

    ISSN： 0946-2171

  152. Updating Kriging Surrogate Models Based on the Hypervolume Indicator in Multi-Objective Optimization Peer-reviewed

    Koji Shimoyama, Koma Sato, Shinkyu Jeong, Shigeru Obayashi

    JOURNAL OF MECHANICAL DESIGN　135　(9)　2013/09

    DOI： 10.1115/1.4024849 　

    ISSN： 1050-0472

  153. Airport Terrain-Induced Turbulence Simulations Integrated with Weather Prediction Data Peer-reviewed

    Koji Shimoyama, Hiroki Nakanomyo, Shigeru Obayashi

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　56　(5)　286-292　2013/09

    DOI： 10.2322/tjsass.56.286 　

    ISSN： 0549-3811

  154. Measurement sensitivity and resolution for background oriented schlieren during image recording Peer-reviewed

    Ardian B. Gojani, Burim Kamishi, Shigeru Obayashi

    Journal of Visualization　16　(3)　201-207　2013/08

    DOI： 10.1007/s12650-013-0170-5 　

    ISSN： 1343-8875 1875-8975

  155. Use of the Immersed Boundary Method within the Building Cube Method and its Application to Real Vehicle CAD Data

    Keiji Onishi, Shigeru Obayashi, Kazuhiro Nakahashi, Makoto Tsubokura

    21st AIAA Computational Fluid Dynamics Conference　AIAA-2013-2713　2013/06

  156. Flow analysis and aerodynamic characteristics of a badminton shuttlecock with spin at high Reynolds numbers Peer-reviewed

    Hiroaki Hasegawa, Seigo Kitta, Masahide Murakami, Shigeru Obayashi

    Sports Engineering　16　(2)　91-98　2013/06

    DOI： 10.1007/s12283-013-0112-4 　

    ISSN： 1369-7072 1460-2687

  157. Evaluation of the Tube-and-Wing Configuration Varieties for Near-Future Fuel Efficient Transonic Transports with the Advanced Aero Engines Peer-reviewed

    Masaya Oshimizu, Shinkyu Jeong, Shigeru Obayashi, Daisuke Sasaki, Kazuhiro Nakahashi

    51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition　2013/01/10

  158. P GUI-based Geometry Deformation Tool for Modification of Aircraft Configurations Peer-reviewed

    Tomoki Taira, Shinkyu Jeong, Shigeru Obayashi, Daisuke Sasaki, Kazuhiro Nakahashi

    51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition　2013/01/09

  159. Numerical Analysis of Clear Air Turbulence by Using Large Eddy Simulation Coupled with a Meteorological Model Peer-reviewed

    Keita Morimoto, Yuriko Takeshima, Shinkyu Jeong, Shigeru Obayashi, Hamaki Inokuchi

    51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition　2013/01/08

  160. Parametric Study of Vortex Generators on a Super Critical Infinite-Wing with Shock-Induced Separation Peer-reviewed

    Nobuo Namura, Shinkyu Jeong, Shigeru Obayashi

    51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition　2013/01/07

  161. Practical Large-Eddy simulation for complex turbulent flowfield with adaptive cartesian mesh and data compression technique

    Ryotaro Sakai, Shigeru Obayashi, Yuichi Matsuo, Kazuhiro Nakahashi

    21st AIAA Computational Fluid Dynamics Conference　2013

  162. CFD-CAA coupled computation of fan noise propagation from engine nacelle based on Cartesian mesh method

    Yuma Fukushima, Takashi Misaka, Shigeru Obayashi, Shinkyu Jeong, Daisuke Sasaki, Kazuhiro Nakahashi

    19th AIAA/CEAS Aeroacoustics Conference　19　2013

  163. Review of background oriented schlieren and development for ballistic range applications Peer-reviewed

    Ardian B. Gojani, Burim Kamishi, Shigeru Obayashi

    EPJ Web of Conferences　45　2013

    DOI： 10.1051/epjconf/20134501034 　

    ISSN： 2101-6275 2100-014X

  164. Surrogate-based multi-objective optimization and data mining of vortex generators on a transonic infinite-wing Peer-reviewed

    Nobuo Namura, Shigeru Obayashi, Shinkyu Jeong

    2013 IEEE Congress on Evolutionary Computation, CEC 2013　2910-2917　2013

    DOI： 10.1109/CEC.2013.6557923 　

  165. Knowledge extraction for structural design of regional jet horizontal tail using Multi-Objective Design Exploration (MODE) Peer-reviewed

    Hiroyuki Morino, Shigeru Obayashi

    Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　7811　656-668　2013

    DOI： 10.1007/978-3-642-37140-0_49 　

    ISSN： 0302-9743 1611-3349

  166. Airfoil Aerodynamic Optimization for A High-Altitude Long-Endurance Aircraft Using Multi-Objective Genetic-Algorithmsd Peer-reviewed

    Abel Mata Zetina, Shinkyu Jeong, Shigeru Obayashi

    2013 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION (CEC)　2314-2320　2013

  167. Kriging-Surrogate-Based Optimization Considering Expected Hypervolume Improvement in Non-Constrained Many-Objective Test Problems Peer-reviewed

    Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    2013 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION (CEC)　658-665　2013

  168. EVOLVE: A Linked Visualization Environment for Explanatory Variables and Objective Function of Optimization Problems Peer-reviewed

    Maki Kubota, Takayuki Itoh, Shigeru Obayashi, Yuriko Takeshima

    2013 INTERNATIONAL CONFERENCE ON CYBERWORLDS (CW)　378-378　2013

    DOI： 10.1109/CW.2013.26 　

  169. Estimation of Low-Level Turbulence Utilizing the Proper Orthogonal Decomposition and Particle Filter Peer-reviewed

    Ryota Kikuchi, Takashi Misaka, Shigeru Obayashi

    2013 16TH INTERNATIONAL CONFERENCE ON INFORMATION FUSION (FUSION)　1364-1371　2013

  170. Wind tunnel testing on start/unstart characteristics of finite supersonic biplane Wing Peer-reviewed

    Hiroshi Yamashita, Naoshi Kuratani, Masahito Yonezawa, Toshihiro Ogawa, Hiroki Nagai, Keisuke Asai, Shigeru Obayashi

    International Journal of Aerospace Engineering　2013　2013

    DOI： 10.1155/2013/231434 　

    ISSN： 1687-5966

    eISSN： 1687-5974

  171. 空港周辺で発生する低層風擾乱の気象モデルとLESによる融合解析 Peer-reviewed

    菊池亮太, 三坂孝志, 大林茂, 牛尾知雄, 嶋村重治, 又吉直樹

    日本航空宇宙学会論文集　61　(6)　159-166　2013

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.61.159 　

    ISSN： 1344-6460

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    Low-level turbulence around airport poses a potential hazard to aircraft operations such as take-off and landing. An advisory system for such atmospheric turbulence is of great help in safe airport operations. Aiming for a part of the advisory system, we investigate terrain-induced low-level turbulence at Shonai airport by an integrated approach of meteorological model prediction and high resolution large eddy simulation. The predicted results by the integrated system are validated against Doppler radar observations focusing on strong-wind events. The results revealed that low-level turbulence is triggered by a hill located on the north side of the runway. Furthermore, the results showed the extent of the low-level turbulence in the wake of the hill, that is, the turbulent area increases vertically as well as horizontally in the downwind direction. The magnitude and the direction of winds vary in short period of time due to the turbulent nature of the terrain-induced turbulence. A simplified model is employed to estimate the vertical load of aircraft along a flight path from the predicted turbulent wind field. These findings would be used to predict the hazardous area to aircraft operations, which is an important part of the advisory system.

  172. Development of a Sensitivity-Adjustable Three-Component Force Balance and Its Application to Wind Tunnel Testing Peer-reviewed

    Yamada,G, Kawazoe,H, Suemura,H, Matsuno,T, Obayashi,S

    J. Fluid Science and Technology　8　(2)　209-218　2013

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jfst.8.209 　

    ISSN： 1880-5558

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    The purpose of the research is to develop the method of designing and manufacturing a sensitivity-adjustable three component force balance utilized in a wind tunnel experiment. This paper describes the characteristics of the force balance and its application to wind tunnel testing. In this study, an oval-shape force balance is newly introduced and the characteristics are investigated by FEM analysis and force balance calibration. Also, the validity of the force balance is investigated in a wind tunnel experiment. As a result, the sensitivity of the oval-shape force balance can be adjusted by changing the aspect ratio and aerodynamic forces can be measured in a wind tunnel experiment using it. In conclusion, we can develop the sensitivity-adjustable force balance by applying oval shape and the force balance can be used in a wind tunnel experiment. It is recommended that the strain gauge position and its paste procedure be still improved.

  173. Aerodynamic Characteristics and Effects of Winglets of the Boomless Tapered Supersonic Biplane during the Starting Process Peer-reviewed

    YAMASHITA Hiroshi, FUJISONO Takashi, TOYODA Atsushi, NAGAI Hiroki, ASAI Keisuke, JEONG Shinkyu, OBAYASHI Shigeru

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN　11　(0)　17-26　2013

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/tastj.11.17 　

    ISSN： 1884-0485

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    The aerodynamic characteristics and the effects of tip plates of a tapered supersonic biplane wing during the starting process were investigated by experimental and computational fluid dynamics (EFD/CFD). Three types of wing models were used: one with a tip plate covering only the aft-half of the wing tip (type-A); one with a tip plate covering the entire wing tip (type-B); and one without a tip plate (type-N). Experiments were conducted in a supersonic blowdown wind tunnel 600 &times; 600 mm in cross-section located at the high-speed wind tunnel facility of the Institute of Space and Astronautical Science (ISAS/JAXA). The flow conditions ranged from M&infin; = 1.5 to 1.9 in increments of 0.1. Pressure-sensitive paint was applied to measure the pressure distributions on the wing surface. CFD simulations were conducted for comparison with the experimental results and for detailed investigation of the effects of the Mach number. The tapered biplane wing without a tip plate is found to start between M&infin; = 1.8 and 1.9. The difference in starting Mach number between type-N and type-A is small. On the other hand, the starting Mach number of type-B is approximately 0.05 higher than that of type-N.

  174. Kriging応答曲面法のためのサンプル追加指標の比較 Peer-reviewed

    下山幸治, 鄭信圭, 大林茂

    進化計算学会論文誌　3　(3)　173-184　2012/12/31

    DOI： 10.11394/tjpnsec.3.173 　

  175. Axis Calibration Test Results for 85mm Magnetic φ Suspension and Balance System

    Yoshiki Takagi, Hideo Sawada, Shigeru Obayashi

    Proceedings of 2012 Asia-Pacific International Symposium on Aerospace Technology　2012/11/13

  176. Assessment of some experimental and image analysis factors for background-oriented schlieren measurements Peer-reviewed

    Ardian B. Gojani, Shigeru Obayashi

    APPLIED OPTICS　51　(31)　7554-7559　2012/11

    DOI： 10.1364/AO.51.007554 　

    ISSN： 1559-128X

    eISSN： 2155-3165

  177. Investigation of Data Exploration Method for Thermal-Fluid Simulation Results Using Proper Orthogonal Decomposition

    Nobuyuki ISOSHIMA, Shigeru OBAYASHI

    Proceedings of JSME-CMD ICMS2012　7　(2)　168-183　2012/10/09

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jcst.7.168 　

    ISSN： 1881-6894

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    A data exploration method based on POD was investigated to get clues to improve actual-product designs from a small set of rough-design candidates. The current method is based on the Oyama method which was used to acquire design knowledge of Pareto-optimal solutions obtained by evolutionary approach with large set of simulation models. The expanded method adopted (1) 2 steps POD analysis, and (2) voxel representation for different topology models. These approaches enabled to evaluate rough-design candidates which had non-parametric structures and those were difficult to handle in the original method. Especially, for the case of handling rough-design candidates, there was no explicit rule for model number ordering at the "first" POD analysis. We found that reordering the model numbers based on the first POD result was important, and rich information was obtained from the expansion coefficient vectors that made it possible to classify the feature regions and to detect feature regions with complicated flow structures at the "second" POD analysis. The effectiveness of the expanded method was verified in a cooling design problem for an optical disc drive. We found that the expanded POD-based data exploration method is a promising method for detecting key factors for actual product designs.

  178. Sensitivity Analysis of Unsteady Flow Fields and Numerical Experiments for Optimal Measurement

    Takashi Misaka, Shigeru Obayashi

    Integration2012　2012/10/04

  179. Assessment of some experimental and processing factors for background oriented schlieren measurements

    Ardian B. Gojani, Shigeru Obayashi

    Integration2012　2012/10/03

  180. Aerodynamic Characteristics of a Delta Wing with the Arc Camber for Mars Exploration

    Takao Unoguchi, Shogo Aoyama, Hiroshi Suemura, Gouji Yamada, Takashi Matsuno, Shigeru Obayashi, Hiromitsu Kawazoe

    Integration2012　2012/10/03

  181. Assessment of Supersonic Free-flight Experiment using a Plate Shaped Sabot Aimed at the Biplane Model

    Yuta Saito, Kakuei Suzuki, Takahiro Ukai, Takahiro Imaizumi, Atsushi Toyoda, Takaya Uchida, Akihiro Sasoh, Shigeru Obayashi

    Proceedings of Ninth International Conference on Flow. Dynamics (ICFD2012)　2012/09/21

  182. Aerodynamic Performance of an Airfoil with VGJs for Lift Augmentation

    Tetsuya Miyakoshi, Hiroaki Hasegawa, Syuko Ito, Shigeru Obayashi

    Proceedings of Ninth International Conference on Flow. Dynamics (ICFD2012)　2012/09/20

  183. Development of a Compact Three-Component Force Balance and Its Application

    Hiroshi Suemura, Kouhei Takishita, Gouji Yamada, Takashi Matsuno, Shigeru Obayashi, Hiromitsu Kawazoe

    Proceedings of Ninth International Conference on Flow. Dynamics (ICFD2012)　2012/09/20

  184. Shock Induced Temperature Measurement Using Laser-Induced Thermal Acoustics

    Toshiharu Mizukaki, Shigeru Obayashi

    Proceedings of Ninth International Conference on Flow. Dynamics (ICFD2012)　2012/09/20

  185. High Aerodynamic Drag and Flow Behavior of a Badminton Shuttlecock with Spin at High Reynolds Numbers

    Kenichi Nakagawa, Hiroaki Hasegawa, Masahide Murakami, Shigeru Obayashi

    Proceedings of Ninth International Conference on Flow. Dynamics (ICFD2012)　2012/09/20

  186. Numerical Investigations on the Influence of Rear Spoiler of Road Vehicle on Wake Structure

    Chenguang Lai, Yuting Zhou, Limin Fu, Shigeru Obayashi

    Proceedings of Ninth International Conference on Flow. Dynamics (ICFD2012)　2012/09/20

  187. Quantitative Visualization of Flow Field around High-Speed Projectiles by Using Background-Oriented Schlieren

    Toshiharu Mizukaki, Kiyonobu Ohtani, Shigeru Obayashi

    Proceedings of Ninth International Conference on Flow. Dynamics (ICFD2012)　2012/09/20

  188. Shock Tube Study for Electron Behavior in the Shock Layer

    Shota Ago, Gouji Yamada, Yuto Kubo, Takashi Matsuno, Hiromitsu Kawazoe, Shigeru Obayashi

    Proceedings of Ninth International Conference on Flow. Dynamics (ICFD2012)　2012/09/20

  189. Optimization of a turbulence model by using data assimilation Peer-reviewed

    Hiroshi Kato, Shigeru Obayashi

    Proceedings of European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)　2012/09/12

  190. Time‐resolved shock wave visualization using a pointdiffraction interferemeter Peer-reviewed

    Kiyonobu Ohtani, Daiju Numata, Shigeru Obayashi

    Proceedings of the 20th International Shock Interaction Symposium　2012/08/23

  191. Effect of Shock Wave Reflection and Diffraction for Near-Field Pressure Measurement of Supersonic Projectile using Ballistic Range Peer-reviewed

    Takahiro Ukai, Kiyonobu Ohtani, Shigeru Obayashi

    Proceedings of the 20th International Shock Interaction Symposium　2012/08/22

  192. Kriging/RBF-Hybrid Response Surface Methodology for Highly Nonlinear Functions Peer-reviewed

    Nobuo NAMURA, Koji SHIMOYAMA, Shinkyu JEONG, Shigeru OBAYASHI

    Journal of Computational Science and Technology　6　(3)　81-96　2012/07/20

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jcst.6.81 　

    ISSN： 1881-6894

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    A hybrid method between the Kriging model and the radial basis function (RBF) networks is proposed for robust construction of a response surface of an unknown function. In the hybrid method, RBF approximates the macro trend of the function and the Kriging model estimates the micro trend. Hybrid methods using two types of model selection criteria (MSC), i.e., leave-one-out cross-validation and generalized cross-validation for RBF were applied to three one-dimensional test problems. The results were compared with those of the ordinary Kriging (OK) model and the universal Kriging model. The accuracy of each response surface was compared by function shape and root mean square error. The proposed hybrid models were more accurate than the OK model for highly nonlinear functions because they can capture the macro trend of the function properly by RBF, while the OK model cannot. In addition, the hybrid models can find the global optimum with few sample points using the Kriging model approximation errors.

  193. INVESTIGATION OF A DATA MINING METHOD FOR THERMAL-FLUID SIMULATION RESULTS BASED ON PRESSURE DIFFERENCE BETWEEN FRONT AND BACK SIDES USING MEDIAL-SURFACE AND ITS APPLICATION TO THERMAL DESIGN PROBLEMS Peer-reviewed

    Nobuyuki Isoshima, Makoto Onodera, Shigeru Obayashi

    Proceedings of the 10th World Congress on Computational Mechanics　31　(1)　93-98　2012/07/11

    Publisher:

    ISSN： 0916-4731

  194. Numerical (error) issues on compressible multicomponent flows using a high-order differencing scheme: Weighted compact nonlinear scheme Peer-reviewed

    Taku Nonomura, Seiichiro Morizawa, Hiroshi Terashima, Shigeru Obayashi, Kozo Fujii

    JOURNAL OF COMPUTATIONAL PHYSICS　231　(8)　3181-3210　2012/04

    DOI： 10.1016/j.jcp.2011.12.035 　

    ISSN： 0021-9991

    eISSN： 1090-2716

  195. Aerodynamic Characteristics and Effects of Winglets of the Boomless Tapered Supersonic Biplane during the Starting Process Peer-reviewed

    FUJISONO Takashi, YAMASHITA Hiroshi, TOYODA Atsushi, NAGAI Hiroki, ASAI Keisuke, JEONG Shinkyu, OBAYASHI Shigeru

    JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　60　(1)　1-8　2012/02/05

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.60.1 　

    ISSN： 1344-6460

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    The aerodynamic characteristics and the effects of winglets of a tapered supersonic biplane during the starting process have been investigated through Experimental and Computational Fluid Dynamics (EFD/CFD). Three types of the tapered biplane model were used: without winglet (type-N); with the winglet which covers only the aft-half of the wing tip (type-A); with the winglet which covers the entire wing tip (type-B). Experiment was conducted in the supersonic blow-down wind tunnel with 600mm &times; 600mm cross section located at the High-speed Wind Tunnel Facility of Institute of Space and Astronautical Science, JAXA. The flow conditions covered from M&infin; = 1.5 to 1.9 with increments of 0.1. Pressure-Sensitive Paint was applied to measure pressure distributions on the surface of supersonic biplane models. CFD simulations were conducted to compare with experiment and to investigate effects of the Mach numbers in detail. The tapered biplane without the winglet was found to start between M&infin; = 1.8 and 1.9. The difference of the starting Mach numbers between type-N and type-A was small. On the other hand, the starting Mach number of type-B was about 0.05 higher than that of type-N.

  196. CFD simulations of the wind environment at shonai airport integrated with weather prediction data

    K. Shimoyama, I. I. Nakanomyo, S. Obayashi

    7th International Conference on Computational Fluid Dynamics, ICCFD 2012　2012

    Publisher: International Conference on Computational Fluid Dynamics

  197. Development of vertical takeoff and landing vehicle with flapping wings

    Takeshi Sumita, Shun Takahashi, Norio Arai, Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    30th AIAA Applied Aerodynamics Conference 2012　2455-2467　2012

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2012-3336 　

  198. Statistical approach for determining parameters of a turbulence model

    Hiroshi Kato, Shigeru Obayashi

    15th International Conference on Information Fusion, FUSION 2012　2452-2457　2012

  199. Global variation of sonic boom overpressure due to seasonal changes in atmosphere Peer-reviewed

    Hiroshi Yamashita, Shigeru Obayashi

    NONLINEAR ACOUSTICS: STATE-OF-THE-ART AND PERSPECTIVES (ISNA 19)　1474　336-339　2012

    DOI： 10.1063/1.4749363 　

    ISSN： 0094-243X

  200. Comparison of the Criteria for Updating Kriging Response Surface Models in Multi-Objective Optimization Peer-reviewed

    Koji Shimoyama, Koma Sato, Shinkyu Jeong, Shigeru Obayashi

    2012 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION (CEC)　2012

  201. Aerodynamic Properties and Flow Behavior for a Badminton Shuttlecock with Spin at High Reynolds Numbers Peer-reviewed

    Kenichi Nakagawa, Hiroaki Hasegawa, Masahide Murakami, Shigeru Obayashi

    ENGINEERING OF SPORT CONFERENCE 2012　34　104-109　2012

    DOI： 10.1016/j.proeng.2012.04.019 　

    ISSN： 1877-7058

  202. Aerodynamic Optimization Using Building Cube Method and Data mining with Proper Orthogonal Decomposition Peer-reviewed

    Yoshinori Andoh, Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    6TH INTERNATIONAL CONFERENCE ON SOFT COMPUTING AND INTELLIGENT SYSTEMS, AND THE 13TH INTERNATIONAL SYMPOSIUM ON ADVANCED INTELLIGENT SYSTEMS　1882-1887　2012

  203. Influence of cooling exit flow on aerodynamic performance with different outlet layouts Peer-reviewed

    Chenguang Lai, Yasuaki Kohama, Shigeru Obayashi, Shinkyu Jeong

    INTERNATIONAL JOURNAL OF VEHICLE DESIGN　59　(4)　331-349　2012

    DOI： 10.1504/IJVD.2012.048980 　

    ISSN： 0143-3369

  204. Source of acousticwaves from a supersonic jet impinging on an inclined flat plate with various plate angle Peer-reviewed

    Seiichiro Morizawa, Taku Nonomura, Hironori Honda, Shigeru Obayashi, Makoto Yamamoto, Kozo Fujii

    ECCOMAS 2012 - European Congress on Computational Methods in Applied Sciences and Engineering, e-Book Full Papers　4425-4437　2012

  205. Implementation of visual data mining for unsteady blood flow field in an aortic aneurysm Peer-reviewed

    Seiichiro Morizawa, Koji Shimoyama, Shigeru Obayashi, Kenichi Funamoto, Toshiyuki Hayase

    JOURNAL OF VISUALIZATION　14　(4)　393-398　2011/12

    DOI： 10.1007/s12650-011-0101-2 　

    ISSN： 1343-8875

  206. Design optimization of a sport shoe sole structure by evolutionary computation and finite element method analysis Peer-reviewed

    K. Shimoyama, K. Seo, T. Nishiwaki, S. Jeong, S. Obayashi

    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART P-JOURNAL OF SPORTS ENGINEERING AND TECHNOLOGY　225　(P4)　179-188　2011/12

    DOI： 10.1177/1754337111414485 　

    ISSN： 1754-3371

    eISSN： 1754-338X

  207. Multi-Objective Design Optimization for a Steam Turbine Stator Blade Using LES and GA Peer-reviewed

    Koji Shimoyama, Shu Yoshimizu, Shinkyu Jeong, Shigeru Obayashi, Yasuyuki Yokono

    Journal of Computational Science and Technology　5　(3)　134-147　2011/11

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jcst.5.134 　

    ISSN： 1881-6894

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    Multi-objective design optimization for a steam turbine stator blade was implemented using three-dimensional large eddy simulation (LES) and a genetic algorithm (GA). The GA used here was assisted by the Kriging response surface model for global and efficient optimization. The aim of the optimization described here was to reduce overall pressure loss and local pressure loss due to end walls simultaneously. The optimization results revealed the blade design candidates that overcame the baseline design in terms of overall loss and local loss, and the trade-off relation between them. In addition, these results provided a specific design concept and corresponding flow mechanism to realize a highly efficient stator blade.

  208. Shock stand-off distance of a solid sphere decelerating in transonic velocity range Peer-reviewed

    T. Saito, K. Hatanaka, H. Yamashita, T. Ogawa, S. Obayashi, K. Takayama

    SHOCK WAVES　21　(5)　483-489　2011/09

    DOI： 10.1007/s00193-011-0323-1 　

    ISSN： 0938-1287

    eISSN： 1432-2153

  209. Extraction of design rules from multi-objective design exploration (MODE) using rough set theory Peer-reviewed

    Shigeru Obayashi

    FLUID DYNAMICS RESEARCH　43　(4)　2011/08

    DOI： 10.1088/0169-5983/43/4/041404 　

    ISSN： 0169-5983

  210. Integration of CFD and Wind Tunnel by Data Assimilation Peer-reviewed

    Kato H, Obayashi S

    Journal of Fluid Science and Technology　6　(5)　717-728　2011/07/29

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jfst.6.717 　

    ISSN： 1880-5558

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    In this research, "Data Assimilation" was applied to a wind tunnel experiment. A square cylinder wind tunnel experiment and the ensemble Kalman filter were used to integrate surface pressures of a square cylinder obtained from computation and experiment. The results indicated that surface pressures of the square cylinder and flow field can be replicated by the present data assimilation method, while they could not be replicated by numerical simulation alone. The results of the ensemble Kalman filter were compared with those of "Measurement-Integrated Simulation," which is another integrated method between computation and experiment for fluids.

  211. Drag reduction of a pickup truck by a rear downward flap Peer-reviewed

    J. Ha, S. Jeong, S. Obayashi

    INTERNATIONAL JOURNAL OF AUTOMOTIVE TECHNOLOGY　12　(3)　369-374　2011/06

    DOI： 10.1007/s12239-011-0043-7 　

    ISSN： 1229-9138

  212. 胴体先端形状修正による翼胴型超音速複葉翼機のソニックブーム低減化 Peer-reviewed

    大久保正幸, 豊田篤, 山下博, 小川俊広, 大林茂, 清水克也, 鈴木角栄, 松田淳, 佐宗章弘

    日本航空宇宙学会論文集　59　(688)　119-125　2011/05/05

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.59.119 　

    ISSN： 1344-6460

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    To examine the possibility of sonic boom mitigation by the supersonic biplane with a fuselage, two kinds of wing-fuselage models for the ballistic range experiment were designed by using CFD simulations. One was the low-boom model with a blunt nose and the other was the high-boom model with a spike nose. From the CFD result, the near-field pressure strength from the low-boom model becomes 70% of that of the high-boom model. The far-field pressure peak of the low-boom model becomes 85% of that of the high-boom model. To verify the near-field pressure signature calculated by CFD, the experimental model using the supersonic biplane with a finite-thickness leading edge was designed and launched with the ballistic range. As a result, the reliability of the CFD result was confirmed.

  213. Hybrid wind tunnel based on ensemble Kalman filter

    Hiroshi Kato, Shigeru Obayashi

    Fusion 2011 - 14th International Conference on Information Fusion　2011

  214. Kriging/RBF-Hybrid Response Surface Method for Highly Nonlinear Functions Peer-reviewed

    Nobuo Namura, Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    2011 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION (CEC)　2534-2541　2011

  215. Validation study on computational aeroacoustics of acoustics waves from sub-scale rocket plume Invited

    S. Morizawa, T. Nonomura, S. Tsutsumi, N. Yamanishi, K. Terashima, S. Obayashi, K. Fujii

    162nd Meeting Acoustical Society of America　4pNS　2011

  216. Application of data mining into acoustic waves from a rocket plume Peer-reviewed

    Seiichiro Morizawa, Taku Nonomura, Akira Oyama, Kozo Fujii, Shigeru Obayashi

    40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011　1　257-262　2011

  217. Experimental and Numerical Investigations on the Influence of Vehicle Rear Diffuser Angle on Aerodynamic Drag and Wake Structure Peer-reviewed

    Chenguang Lai, Yasuaki Kohama, Shigeru Obayashi, Shinkyu Jeong

    International Journal of Automotive Engineering 2　2　(2)　47-53　2011

    Publisher: Society of Automotive Engineers of Japan, INC

    DOI： 10.20485/jsaeijae.2.2_47 　

    ISSN： 2185-0984

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    Experimental and numerical studies are performed to evaluate and analyze the influence of the notchback rear diffuser angle on aerodynamic drag and wake structure. The relationship between aerodynamic drag and rear diffuser angle is summarized, and the flow mechanism are analyzed and discussed. A speculation regarding lower trailing vortices is proposed, and is verified in the present research model. Rear diffuser angle is an important factor influencing the wake structure, and optimizing the vehicle rear diffuser at a favorable angle can contribute to reduce the drag force and improve the wake structure.

  218. Supersonic wind tunnel experiment on aerodynamic characteristics and winglets effects of the tapered supersonic biplane Peer-reviewed

    Takashi Fujisono, Hiroshi Yamashita, Atsushi Toyoda, Hiroki Nagai, Keisuke Asai, Takashi Matsuno, Hiromitsu Kawazoe, Shinkyu Jeong, Shigeru Obayashi

    ASME-JSME-KSME 2011 Joint Fluids Engineering Conference, AJK 2011　1　(PARTS A, B, C, D)　3431-3440　2011

    DOI： 10.1115/AJK2011-15015 　

  219. Aerodynamic properties of a shuttlecock with spin at high Reynolds number Peer-reviewed

    Seigo Kitta, Hiroaki Hasegawa, Masahide Murakami, Shigeru Obayashi

    5TH ASIA-PACIFIC CONGRESS ON SPORTS TECHNOLOGY (APCST)　13　271-277　2011

    DOI： 10.1016/j.proeng.2011.05.084 　

    ISSN： 1877-7058

  220. Multi-Objective Design Exploration and its Applications Invited Peer-reviewed

    Shigeru Obayashi, Shinkyu Jeong, Koji Shimoyama, Kazuhisa Chiba, Hiroyuki Morino

    International Journal of Aeronautical and Space Science　11　(4)　247-265　2010/11/04

  221. 人力飛行機長距離飛行におけるダウンスケール気象予測の適用とその検証 Application and Validation of Downscaling Weather Forecast for Long-Distance Flight by Human-Powered Aircraft Peer-reviewed

    沢田雅洋, 山下博, 岩崎俊樹, 大林茂

    日本航空宇宙学会論文集　58　(681)　295-301　2010/10/05

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.58.295 　

    ISSN： 1344-6460

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    Research of Long-Distance Human-Powered Flight has been performed through the following four items: Aircraft design, Risk management, Pilot performance, Weather prediction. Actual flight took place on August 12, 2009. The flight distance was 20.72km. In this study, results of weather prediction using 1-way downscaling technique are validated by surface observation data and feasibility of weather prediction for Long-Distance Human-Powered Flight is discussed. The weather prediction with 1-km mesh decreases RMSE of wind speed by 0.1--0.2m/s compared with that with 5-km mesh. The weather prediction with 1-km mesh also has a potential to reproduce nonstationary wind. The RMSE gradually increase with time, which is mainly caused by initial and boundary data given from coarse mesh model. To reduce the RMSE, it is desirable to use newest analysis data as possible for initial and boundary data.

  222. Helicopter Rotor Shape Optimization for the Improvement of Aeroacoustic Performance in Hover Peer-reviewed

    Sanghyun Chae, Kwanjung Yee, Choongmo Yang, Takashi Aoyama, Shinkyu Jeong, Shigeru Obayashi

    JOURNAL OF AIRCRAFT　47　(5)　1770-1783　2010/09

    DOI： 10.2514/1.C000283 　

    ISSN： 0021-8669

  223. 可視化による知識発見のライフサイクル管理とその流動応用評価

    FUJISHIRO Issei, HAYASE Toshiyuki, OBAYASHI Shigeru, TAKESHIMA Yuriko

    平成21年度公募共同研究報告書　(J09038)　79-80　2010/08

    Publisher: 東北大学流体科学研究所

  224. Two-Dimensional Optimization of a Stent for an Aneurysm Peer-reviewed

    K. Srinivas, S. Townsend, C. J. Lee, T. Nakayama, M. Ohta, S. Obayashi, T. Yamaguchi

    JOURNAL OF MEDICAL DEVICES-TRANSACTIONS OF THE ASME　4　(2)　021003-1-021003-7　2010/06

    DOI： 10.1115/1.4001861 　

    ISSN： 1932-6181

  225. Aerodynamic Performance of the Three-Dimensional Lifting Supersonic Biplane Peer-reviewed

    Masahito Yonezawa, Shigeru Obayashi

    JOURNAL OF AIRCRAFT　47　(3)　983-991　2010/05

    DOI： 10.2514/1.46651 　

    ISSN： 0021-8669

  226. Topologically-Based Haptization and Visualization of Wake Turbulence Datasets Peer-reviewed

    Yuriko Takeshima, Issei Fujishiro, Shigeo Takahashi, Shigeru Obayashi

    In DVD Proceedings of IIEEJ Image Electronics and Visual Computing Workshop 2010　2010/03

  227. Low-speed aerodynamic characteristics of a busemann-type silent supersonic biplane

    Hiromitsu Kawazoe, Shinji Abe, Takashi Matsuno, Goji Yamada, Shigeru Obayashi

    27th Congress of the International Council of the Aeronautical Sciences 2010, ICAS 2010　2　1491-1450　2010

  228. Global variation of sonic boom intensity due to seasonal atmospheric gradients

    Hiroshi Yamashita, Shigeru Obayashi

    48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition　2010

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2010-1389 　

  229. J0101-1-4 High-Dimensional Performance Map Construction for a Centrifugal Diffuser by Data Mining

    SHIMOYAMA Koji, SUGIMURA Kazuyuki, JEONG Shinkyu, OBAYASHI Shigeru

    The proceedings of the JSME annual meeting　2010　7-8　2010

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2010.6.0_7 　

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    This paper proposes and demonstrates the construction of performance maps, which represent relations between various performance and geometry parameters, with the aid of data mining techniques. Data mining can reveal characteristic patterns in high-dimensional data with performance and geometry parameters. Therefore, the data mining results make it easy to interpret complex features of performance vs. geometry relations, and help engineers to discover new knowledge for engineering design through interpretation. The present demonstration of a centrifugal diffuser demonstrated that the data mining techniques are suitable and applicable to high-dimensional performance map construction, together with actual acquisition of new knowledge for diffuser design that was unknown from conventional quasi-one-dimensional nozzle theory.

  230. Robust multidisciplinary design optimisation using CFD and advanced evolutionary algorithms Peer-reviewed

    Dong Seop Lee, Karkenahalli Srinivas, Luis Felipe Gonzalez, Jacques Periaux, Shigeru Obayashi

    Computational Fluid Dynamics Review 2010　469-492　2010/01/01

    Publisher: World Scientific Publishing Co.

    DOI： 10.1142/9789814313377_0019 　

  231. Data mining for the advection database of wake vortices Peer-reviewed

    Hiroshi Kato, Koji Shimoyama, Shigeru Obayashi, Masahiro Kudo

    AIAA Atmospheric and Space Environments Conference 2010　2010

    DOI： 10.2514/6.2010-7989 　

  232. Investigation of aerodynamic performance due to the interaction between the rear diffuser angle and the cooling airflow outlet Peer-reviewed

    Chen-Guang Lai, Yasuaki Kohama, Shigeru Obayashi, Jeong Shinkyu

    SAE Technical Papers　2010

    DOI： 10.4271/2010-01-0290 　

  233. The Development of Surrogate Model Based MDO Platform-MEDOC Peer-reviewed

    Sanghyun Chae, Kwanjung Yee, Shigeru Obayashi, Shinkyu Jeong

    PROCEEDINGS OF 2010 ASIA-PACIFIC INTERNATIONAL SYMPOSIUM ON AEROSPACE TECHNOLOGY, VOL 1 AND 2　41-+　2010

  234. Material Design Optimization for a Sport Shoe Sole by Evolutionary Computation and FEM Analysis Peer-reviewed

    Koji Shimoyama, Kazuya Seo, Tsuyoshi Nishiwaki, Shinkyu Jeong, Shigeru Obayashi

    2010 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION (CEC)　3193-3199　2010

  235. Visual Data Mining for Unsteady Blood Flow Field, Peer-reviewed

    S. Morizawa, K. Shimoyama, S. Obayashi, K. Funamoto, T. Hayase

    OE-001　2010

  236. Data mining for the investigation of unsteady flow field in a hard disk drive Peer-reviewed

    Seiichiro Morizawa, Shinkyu Jeong, Koji Shimoyama, Shigeru Obayashi

    Proceedings - 2010 2nd World Congress on Nature and Biologically Inspired Computing, NaBIC 2010　152-157　2010

    DOI： 10.1109/NABIC.2010.5716324 　

  237. Multi-objective optimization and design rule mining for an aerodynamically efficient and stable centrifugal impeller with a vaned diffuser Peer-reviewed

    K. Sugimura, S. Obayashi, S. Jeong

    ENGINEERING OPTIMIZATION　42　(3)　271-293　2010

    DOI： 10.1080/03052150903171084 　

    ISSN： 0305-215X

  238. Flow characteristics of a pickup truck with regard to the bed geometry variation Peer-reviewed

    J. Ha, S. Jeong, S. Obayashi

    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING　224　(D7)　881-891　2010

    DOI： 10.1243/09544070JAUTO1427 　

    ISSN： 0954-4070

  239. 低速における超音速複葉翼の３次元空力性能評価 Peer-reviewed

    尾崎修一, 小川俊広, 大林 茂, 松野 隆, 川添博光

    日本航空宇宙学会論文集　57　(671)　461-467　2009/12/05

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.57.461 　

    ISSN： 1344-6460

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    This study focuses on the aerodynamic performance of the supersonic biplane at the low-speed region. The performance was evaluated and discussed through Computational Fluid Dynamics (CFD) and Experimental Fluid Dynamics (EFD). The result of the CFD simulation was compared with the experimental result to validate the simulation and confirmed to be reliable. Therefore, the CFD results were employed to derive the aerodynamic performance coupled with the theoretical equations. In the wind tunnel experiment, the three-component force measurement was conducted to obtain lift, drag and pitching moment coefficients. The wake survey was conducted to measure the drag in detail. The results proved the low-speed aerodynamic performance of the supersonic biplane can be described by the classical ``general biplane theory'' reasonably well.

  240. Reducing drag penalty in the three-dimensional supersonic biplane Peer-reviewed

    M. Yonezawa, S. Obayashi

    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING　223　(G7)　891-899　2009/11

    DOI： 10.1243/09544100JAERO521 　

    ISSN： 0954-4100

  241. Reducing drag penalty in the three-dimensional supersonic biplane Invited Peer-reviewed

    M. Yonezawa, S. Obayashi

    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING　223　(G7)　891-899　2009/11

    DOI： 10.1243/09544100JAERO521 　

    ISSN： 0954-4100

  242. Sonic Boom Variability Due to Homogeneous Atmospheric Turbulence Peer-reviewed

    Hiroshi Yamashita, Shigeru Obayashi

    JOURNAL OF AIRCRAFT　46　(6)　1886-1893　2009/11

    DOI： 10.2514/1.40215 　

    ISSN： 0021-8669

  243. Development and Investigation of Efficient GA/PSO-Hybrid Algorithm Applicable to Real-World Design Optimization Invited Peer-reviewed

    Shinkyu Jeong, Shoichi Hasegawa, Koji Shimoyama, Shigeru Obayashi

    IEEE COMPUTATIONAL INTELLIGENCE MAGAZINE　4　(3)　36-44　2009/08

    DOI： 10.1109/MCI.2009.933099 　

    ISSN： 1556-603X

    eISSN： 1556-6048

  244. Experimental and Computational Studies of Low-Speed Aerodynamic Performance and Flow Characteristics around a Supersonic Biplane Peer-reviewed

    Naoshi Kuratani, Shuichi Ozaki, Shigeru Obayashi, Toshihiro Ogawa, Takashi Matsuno, Hiromitsu Kawazoe

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　52　(176)　89-97　2009/08

    DOI： 10.2322/tjsass.52.89 　

    ISSN： 0549-3811

  245. Drag Reduction of a Bluff-Body using Design of Experiments Peer-reviewed

    Jongsoo Ha, Shuya Yoshioka, Takuma Kato, Yasuaki Kohama, Shigeru Obayashi

    Transactions of Society of Automotive Engineers of Japan　40　(3)　655-660　2009/06/16

    Publisher: Society of Automotive Engineers of Japan

    DOI： 10.11351/jsaeronbun.40.655 　

    ISSN： 0287-8321

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    The drag reduction system which consisted of the rear underbody slant and the rear flat flaps of a bluff-body was optimized by using design of experiments with robustness for cross wind. Drag force measurements accompanied by the orthogonal array were carried out at the low turbulence wind tunnel varying in the yaw angle. As a result of the analysis of variance, it was identified that the rear underbody slant angle, the lower and upper flaps' lengths were significant to the drag force while the side flap's length and interaction effects were insignificant. The slant angle, the most significant factor, should be set very carefully in designing the drag reduction device.

  246. Reduction of drag penalty by means of plain flaps in the boomless busemann biplane Peer-reviewed

    Hiroshi Yamashita, Shigeru Obayashi, Kazuhiro Kusunose

    International Journal of Emerging Multidisciplinary Fluid Sciences　1　(2)　141-164　2009/06/01

    DOI： 10.1260/175683109788707490 　

    ISSN： 1756-8315

  247. Practical Implementation of Robust Design Assisted by Response Surface Approximation and Visual Data-Mining Peer-reviewed

    Koji Shimoyama, Jin Ne Lim, Shinkyu Jeong, Shigeru Obayashi, Masataka Koishi

    JOURNAL OF MECHANICAL DESIGN　131　(6)　2009/06

    DOI： 10.1115/1.3125207 　

    ISSN： 1050-0472

  248. 超音速複葉翼における超音速流れの履歴現象の2次元CFD解析 Peer-reviewed

    米澤誠仁, 大林茂

    日本航空宇宙学会論文集　57　(662)　131-133　2009/03/05

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.57.131 　

    ISSN： 1344-6460

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    The Busemann biplane is well known as the airfoil that has zero wave drag at the supersonic flight in the linear theory. It is found that this airfoil has a hysteresis in drag values from the transonic speeds through the low supersonic speeds based on Computational Fluid Dynamics (CFD) analysis. This paper shows that this hysteresis is explained by the Kantrowitz-Donaldson Criteria that usually defines the start and unstart of the supersonic intake.

  249. Optimization of nonlinear lateral characteristic of lifting-body type reentry vehicle Peer-reviewed

    Shinkyu Jeong, Kunihiro Suzuki, Shigeru Obayashi, Mitsuru Kurita

    Journal of Aerospace Computing, Information and Communication　6　(3)　239-255　2009/03

    DOI： 10.2514/1.36302 　

    ISSN： 1542-9423

  250. Kriging-Model-Based Multi-Objective Robust Optimization and Trade-Off Rule Mining of a Centrifugal Fan with Dimensional Uncertainty Peer-reviewed

    Kazuyuki Sugimura, Shinkyu Jeong, Shigeru Obayashi, Takeshi Kimura

    Journal of Computational Science and Technology　3　(1)　196-211　2009/02

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jcst.3.196 　

    ISSN： 1881-6894

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    We propose a new method of design called MORDE (multi-objective robust design exploration) that combines a multi-objective robust optimization approach and data-mining techniques for analyzing trade-offs. The probabilistic representation of design parameters, which is compatible with the Taguchi method, is incorporated into the optimization system we previously developed that uses a multi-objective genetic algorithm. The means and standard deviations of responses of evaluation functions against uncertainties in design variables are evaluated by descriptive Latin hypercube sampling using Kriging surrogate models. Design space is visualized by Self-organizing map (SOM). To extract design rules further, a new approach that adopts the association rule with an "aspiration vector" is proposed. MORDE is then applied to an industrial design problem with a centrifugal fan for a washer-dryer. Taking dimensional uncertainty into account, we optimize the means and standard deviations of the resulting distributions of the fan efficiency and turbulent noise level. Steady Reynolds-averaged Navier Stokes simulations are carried out to collect the necessary dataset for Kriging models. We demonstrate the advantages of the proposed method of multi-objective robust optimization over traditional non-robust ones in that the solutions are diverse. We clarify that the association rule can extract both sufficient and necessary conditions as design rules to achieve trade-off balances. The association rule is also more beneficial than SOM in finding quantitative relations, particularly those that are concerned with more than three design parameters.

  251. CFD解析による有限幅の超音速複葉翼の空力特性評価 Peer-reviewed

    米澤誠仁, 大林茂

    日本航空宇宙学会論文集　57　(660)　32-38　2009/01/05

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.57.32 　

    ISSN： 1344-6460

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    The supersonic biplane is well known as the airfoil that has zero wave drag at the supersonic speed. This paper investigates aerodynamic characteristics of the supersonic biplane with the finite span length and effects of the aspect and taper ratios by comparing with the two-dimensional supersonic biplane which has the infinite span length using the computational fluid dynamics. The rectangular wing was employed to examine the effect of the aspect ratio and tapered wing was employed to inspect the effect of the taper ratio. Both the rectangular wing and the two-dimensional supersonic biplane choke at the high angle of attack. The drag of the three-dimensional wing becomes smaller when it has a higher aspect ratio. The drag polar curve of the three-dimensional wing approaches asymptotically to the drag polar curve of the two-dimensional supersonic biplane when it has a higher taper ratio. The drag of the tapered wing becomes smaller when it has an adequate taper ratio.

  252. Efficient aeroelastic analysis using unstructured CFD method and reduced-order unsteady aerodynamic model

    Hiroyuki Morino, Hitoshi Yamaguchi, Takayasu Kumano, Shinkyu Jeong, Shigeru Obayashi

    Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference　2009

    ISSN： 0273-4508

  253. Drag characteristics of a pickup truck according to the bed geometry

    Jongsoo Ha, Shigeru Obayashi, Yasuaki Kohama

    Proceedings of the 7th IASME / WSEAS International Conference on Fluid Mechanics and Aerodynamics, FMA '09　122-127　2009

  254. J0104-1-1 Flow Information Exploration of Unsteady Flow Field in Hard Disk Drive

    Morizawa Seiichiro, Shimoyama Koji, Jeong Shinkyu, Obayashi Shigeru

    The proceedings of the JSME annual meeting　2009　87-88　2009

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2009.6.0_87 　

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    A hard disk drive (HDD) involves high-speed trailing flow on the rotating disk, which may cause vibration force. In order to reveal the information of flow fields related to the vibration force, this study performed the data mining in the unsteady computational fluid dynamics (CFD) simulation data for HDD flow fields. The present data mining started from the extraction of temporal characteristics from the time-series data of fluid properties given at each grid point, and then moved to the clustering analysis of the grid points based on the similarity of the temporal characteristics. Finally, the clustering results were projected onto a real space of the HDD for discussion. The present results indicated that a significant sequence of flow energy production and dissipation, which leads the vibration force, occurs near the filter entrance, arm root, and shroud wall between them.

  255. Application of crossflow transition criteria to local correlation-based transition model

    Yuto Watanabe, Takashi Misaka, Shigeru Obayashi, Toshiyuki Arima, Yoshihiro Yamaguchi

    47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition　2009

  256. Advection database of wake vortices at Sendai airport based-on lidar measurement

    Hiroshi Kato, Shigeru Obayashi, Takashi Misaka, Izumi Yamada

    1st AIAA Atmospheric and Space Environments Conference　2009

  257. Multi-objective robust optimization assisted by response surface approximation and visual data-mining Peer-reviewed

    Koji Shimoyama, Jin Ne Lim, Shinkyu Jeong, Shigeru Obayashi, Masataka Koishi

    Studies in Computational Intelligence　171　133-151　2009

    DOI： 10.1007/978-3-540-88051-6_7 　

    ISSN： 1860-949X

  258. 4次元変分法による後方乱気流の計測融合シミュレーション Peer-reviewed

    三坂孝志, 加藤博司, 小笠原健, 大林茂, 山田泉, 奥野善則

    応用数理　19　(3)　150-162　2009

    Publisher: The Japan Society for Industrial and Applied Mathematics

    DOI： 10.11540/bjsiam.19.3_150 　

    ISSN： 0917-2270

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    Realistic retrieval of aircraft wake turbulence at an airport is not straight-forward due to the difficulty in incorporating actual conditions such as an atmospheric boundary layer and a flight trajectory into the numerical simulation. In this study, the numerical simulation of wake turbulence is performed by integrating lidar measurements at Sendai airport. The four-dimensional variational method is employed for the integration with taking an actual measurement process into consideration. The behavior of wake turbulence under realistic wind conditions is shown after the discussion regarding the convergence of a retrieved flow field.

  259. A New Design Method based on Cooperative Data Mining from Multi-Objective Design Space Peer-reviewed

    Kazuyuki Sugimura, Shigeru Obayashi, Shinkyu Jeong

    Journal of Computational Science and Technology　3　(1)　287-302　2009

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jcst.3.287 　

    ISSN： 1881-6894

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    We propose a new multi-objective parameter design method that uses the combination of the following data mining techniques: analysis of variance, self-organizing map, decision tree analysis, rough set theory, and association rule. This method first aims to improve multiple objective functions simultaneously using as much predominant main effects of different design variables as possible. Then it resolves the remaining conflictions between the objective functions using predominant interaction effects of design variables. The key to realizing this method is the obtaining of various design rules that quantitatively relate levels of design variables to levels of objective functions. Based on comparative studies of data mining techniques, the systematic processes for obtaining these design rules have been clarified, and the points of combining data mining techniques have also been summarized. This method has been applied to a multi-objective robust optimization problem of an industrial fan, and the results show its superior capabilities for controlling parameters to traditional single-objective parameter design methods like the Taguchi method.

  260. Real-world application of robust design optimization assisted by response surface approximation and visual data-mining Peer-reviewed

    Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    Transactions of the Japanese Society for Artificial Intelligence　24　(1)　13-24　2009

    Publisher: Japanese Society for Artificial Intelligence

    DOI： 10.1527/tjsai.24.13 　

    ISSN： 1346-8030 1346-0714

  261. Optimization of Nonlinear Lateral Characteristic of Lifting-Body Type Reentry Vehicle Peer-reviewed

    Shinkyu Jeong, Kunihiro Suzuki, Shigeru Obayashi, Mitsuru Kurita

    JOURNAL OF AEROSPACE COMPUTING INFORMATION AND COMMUNICATION　6　(3)　239-255　2009

    DOI： 10.2514/1.36302 　

    ISSN： 1940-3151

  262. Physics Data Mining for Three-Dimensional Unsteady Blood Flow Field in an Aneurysmal Aorta

    Shinichiro Morizawa, Koji Shimoyama, Shigeru Obayashi, Kenichi Funamoto, Toshiyuki Hayase

    Proceedings of the 8th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration　74-75　2008/12

  263. 仙台空港における後方乱気 流の計測融合シミュレーション Peer-reviewed

    三坂 孝志, 大林 茂, 藤代 一成, 竹島 由里子, 山田 泉, 奥野 善則

    次世代スーパーコンピューティング・シンポジウム 2008 資料集　63-64　2008/09

  264. Knowledge Discovery for Flyback-Booster Aerodynamic Wing Design Using Data Mining Peer-reviewed

    Kazuhisa Chiba, Shigeru Obayashi

    JOURNAL OF SPACECRAFT AND ROCKETS　45　(5)　975-987　2008/09

    DOI： 10.2514/1.28511 　

    ISSN： 0022-4650

  265. Low-Boom and Low-Drag Optimization of the Twin Engine Version of Silent Supersonic Business Jet Peer-reviewed

    Koma SATO, Takayasu KUMANO, Masahito YONEZAWA, Hiroshi YAMASHITA, Shinkyu JEONG, Shigeru OBAYASHI

    Journal of Fluid Science and Technology　3　(4)　576-585　2008/07/10

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jfst.3.576 　

    ISSN： 1880-5558

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    Multi-Objective Optimization has been applied to a design problem of the twin engine concept for Silent Supersonic Business Jet (SSBJ). This problem aims to find main wing, body, tail wing and engine nacelle configurations, which can minimize both sonic boom and drag in a supersonic cruising flight. The multi-objective genetic algorithm (MOGA) coupled with the Kriging model has been used to globally and effectively search for optimal design candidates in the multi-objective problem. The drag and the sonic boom have been evaluated by the computational fluid dynamics (CFD) simulation and the waveform parameter method. As a result, the present optimization has successfully obtained low-boom and low-drag design candidates, which are better than the baseline design by more than 40% regarding each performance. Moreover, the structure of design space has been visualized by the self-organizing map (SOM).

  266. Measurement-integrated simulation of clear air turbulence using a four dimensional variational method Peer-reviewed

    Takashi Misaka, Shigeru Obayashi, Eiichi Endo

    JOURNAL OF AIRCRAFT　45　(4)　1217-1229　2008/07

    DOI： 10.2514/1.34111 　

    ISSN： 0021-8669

  267. Assimilation Experiment of Lidar Measurements for Wake Turbulence Peer-reviewed

    Takashi MISAKA, Takeshi OGASAWARA, Shigeru OBAYASHI, Izumi YAMADA, Yoshinori OKUNO

    Journal of Fluid Science and Technology　3　(4)　512-518　2008/06/30

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jfst.3.512 　

    ISSN： 1880-5558

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    Numerical simulation of wake turbulence was performed by integrating the lidar measurements using four-dimensional variational method. A bogus vortex technique was adopted to ensure the existence of wake vortices in the flow field. The validation of the method was performed by an idealized test case using virtual lidar measurement which was produced by the reference simulation of a vortex pair. The results of the validation showed the convergence of a vortex parameter such as a circulation to the parameter of reference simulation case. It was also confirmed that the velocity distribution on a measurement plane agreed with reference one.

  268. Measurement of Aircraft Wake Vortices Using Doppler LIDAR Peer-reviewed

    Takeshi OGASAWARA, Takashi MISAKA, Toshihiro OGAWA, Shigeru OBAYASHI, Izumi YAMADA

    Journal of Fluid Science and Technology　3　(4)　488-499　2008/06/30

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jfst.3.488 　

    ISSN： 1880-5558

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    In this research, the wake turbulence from actual passenger airplanes taking off from Sendai airport was measured with Electronic Navigation Research Institute's Doppler laser radar (lidar). First, the influence of the surrounding wind on the behavior of wake vortices was investigated. The wake vortices in the crosswind case disappear more quickly from the runway than those of the low surrounding wind and head wind cases. In addition, the wake vortices in the case of large crosswind move faster than those in small crosswind. Next, the correction factor was estimated by using the pseudo lidar measurements based on Computational Fluid Dynamics (CFD). The corrected data for weak surrounding wind case agreed with the existing wake vortex model.

  269. Studies on Design Optimization of Coronary Stents Peer-reviewed

    K. Srinivas, T. Nakayama, M. Ohta, S. Obayashi, T. Yamaguchi

    JOURNAL OF MEDICAL DEVICES-TRANSACTIONS OF THE ASME　2　(1)　011004-1-011004-7　2008/03

    DOI： 10.1115/1.2885145 　

    ISSN： 1932-6181

  270. Multiobjective design study of a flapping wing power generator Peer-reviewed

    Eriko Shimizu, Koji Isogai, Shigeru Obayashi

    JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME　130　(2)　021104-1-021104-8　2008/02

    DOI： 10.1115/1.2829580 　

    ISSN： 0098-2202

  271. Wing configuration effects on flow field and aerodynamic performance of supersonic biplane for sonic-boom reduction

    Naoshi Kuratani, Masahito Yonezawa, Hiroshi Yamashita, Shuichi Ozaki, Toshihiro Ogawa, Shigeru Obayashi

    ICAS Secretariat - 26th Congress of International Council of the Aeronautical Sciences 2008, ICAS 2008　2　3001-3010　2008

  272. Blade planform optimization to reduce HSI noise of helicopter in hover

    Choongmo Yang, Takashi Aoyama, Sanghyun Chae, Kwanjung Yee, Shinkyu Jeong, Shigeru Obayashi

    Annual Forum Proceedings - AHS International　3　2218-2232　2008

    ISSN： 1552-2938

  273. 604 Lidar Measurement Integrated Simulation of Aircraft Wake Vortices during Takeoff

    Misaka Takashi, Obayashi Shigeru, Yamada Izumi, Okuno Yoshinori

    The proceedings of the JSME annual meeting　2008　7-8　2008

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2008.6.0_7 　

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    Numerical simulation of aircraft's wake turbulence was carried out by integrating lidar measurements. Four-dimensional variational method (4D-Var) was applied to integrate the lidar measurements into three-dimensional large eddy simulation (LES). This paper describes the results using lidar measurements at Sendai airport.

  274. Measurement-integrated simulation of wake turbulence

    Takashi Misaka, Takeshi Ogasawara, Shigeru Obayashi, Izumi Yamada, Yoshinori Okuno

    46th AIAA Aerospace Sciences Meeting and Exhibit　2008

    DOI： 10.2514/6.2008-466 　

  275. Knowledge Discovery for Transonic Regional-Jet Wing through Multidisciplinary Design Exploration

    Kazuhisa Chiba, Shigeru Obayashi, Hiroyuki Morino

    JOURNAL OF ADVANCED MECHANICAL DESIGN SYSTEMS AND MANUFACTURING　2　(3)　396-407　2008

    DOI： 10.1299/jamdsm.2.396 　

    ISSN： 1881-3054

  276. Kriging-Model-Based Multi-Objective Robust Optimization and Trade-Off Rule Mining of a Centrifugal Fan with Dimensional Uncertainty Peer-reviewed

    Sugimura, K, Jeong, S, Obayashi, S

    Journal of Computational Science and Technology　3　(1)　2008

  277. Application of hybrid evolutionary algorithms to low exhaust emission diesel engine design Peer-reviewed

    S. Jeong, S. Obayashi, Y. Minemura

    ENGINEERING OPTIMIZATION　40　(1)　1-16　2008/01

    DOI： 10.1080/03052150701561155 　

    ISSN： 0305-215X

  278. Data mining for multidisciplinary design space of regional-jet wing Peer-reviewed

    Kazuhisa Chiba, Shigeru Obayashi

    Journal of Aerospace Computing, Information and Communication　4　(11)　1019-1036　2007/11

    DOI： 10.2514/1.19404 　

    ISSN： 1542-9423

  279. Knowledge discovery in Multidisciplinary design space for regional-jet wings using data mining Peer-reviewed

    Kazuhisa Chiba, Shinkyu Jeong, Shigeru Obayashi

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　50　(169)　181-192　2007/11

    DOI： 10.2322/tjsass.50.181 　

    ISSN： 0549-3811

  280. The Application of the Self-Organizing Map Technology to the Multidisciplinary Design Optimization of the Japanese Regional Jet, MRJ

    HATANAKA Keita, MORINO Hiroyuki, TAKENAKA Keizo, OBAYASHI Shigeru, JEONG Shinkyu, KUMANO Takayasu

    Transactions of Visualization Society of Japan　27　(2)　167-170　2007/09/15

    Publisher: The Visualization Society of Japan

    DOI： 10.3154/jvs.27.Supplement2_167 　

    ISSN： 0916-4731

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    A 5-year R&D project has been in progress in Japan toward the development of an environmentally friendly high performance small jet aircraft since 2003. Authors have been trying to apply a MDO tool to the aircraft design. In this MDO tool, SOM was adopted to extract the essential design knowledge from the optimization results. This paper presents the example of the application of the SOM to an engine-airframe integration design.

  281. Open-type separation on delta wings for leading-edge bluntness Invited Peer-reviewed

    Kazuhisa Chiba, Shigeru Obayashi, Kazuhiro Nakahashi

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　50　(168)　81-87　2007/08

    DOI： 10.2322/tjsass.50.81 　

    ISSN： 0549-3811

  282. An Application of Local Correlation-Based Transition Model to JAXA High-Lift Configuration Model Peer-reviewed

    Atsushi Toyoda, Takashi Misaka, Shigeru Obayashi

    25th AIAA Applied Aerodynamics Conference　2　1390-1400　2007/06

    DOI： 10.2514/6.2007-4286 　

    ISSN： 1048-5953

  283. Multi-Objective Design Exploration and its application to regional-jet wing design Peer-reviewed

    Shigeru Obayashi, Shinkyu Jeong, Kazuhisa Chiba, Hiroyuki Morino

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　50　(167)　1-8　2007/05

    DOI： 10.2322/tjsass.50.1 　

    ISSN： 0549-3811

  284. Improvement of Nonlinear Lateral Characteristics of Lifting-Body Type Reentry Vehicle Using Optimization Algorithm Peer-reviewed

    S. Jeong, K. Suzuki, S. Obayashi

    Proceedings of AIAA Infotech@Aerospace 2007 conference and Exhibit, (2007)　2007/05

  285. Experimental and Computational Fluid Dynamics around Supersonic Biplane for Sonic-Boom Reduction Invited Peer-reviewed

    Naoshi Kuratani, Toshihiro Ogawa, Hiroshi Yamashita, Masahito Yonezawa, Shigeru Obayashi

    13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference)　2007/05

  286. Design Representation and the Shape of the Pareto Front in Evolutionary Multiobjective Structural Design Peer-reviewed

    R. Kicinger, T. Arciszewski, S. Obayashi

    AIAA Infotech@Aerospace2007 Coference and Exhibit　2007/05

  287. Airfoil Shape Optimization by Minimization of an Expensive and Discontinuous Black- box Function Peer-reviewed

    Y. Tenne, S. Obayashi, S. Armfield

    AIAA Infotech@Aerospace2007 Conference and Exhibit　2007/05

  288. Optimisation of Stents for Aneurysm Invited Peer-reviewed

    K. Srinivas, M Ohta, T. Nakayama, S. Obayashi, T. Yamaguchi

    The 4th International Intracranial Stent Meeting ICS07 PROGRAM&ABSTRACTS　38　2007/04

  289. Visualization of the Design Space of a Caudal Fin with Hydro-Elastic Effect Peer-reviewed

    Eriko SHIMIZU, Shinkyu JEONG, Shigeru OBAYASHI, Koji ISOGAI

    Journal of Fluid Science and Technology　2　(1)　163-174　2007/04

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jfst.2.163 　

    ISSN： 1880-5558

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    Performance of a fish caudal fin is brought out from many factors, such as the shape, the movement and the elasticity. The present study treats all of these factors simultaneously and attempts to visualize the complex design space using Kriging and SOM. As a result, the present study succeeded in visualizing the complex structure of the design space of the oscillating wing (caudal fin), and the combined effects of the design variables are shown. This data will become extremely useful for practical design of fish robots and other nautical machines.

  290. Wave drag characteristics of a low-drag supersonic formation flying concept Peer-reviewed

    Yuichiro Goto, Shigeru Obayashi, Yasuaki Kohama

    JOURNAL OF AIRCRAFT　44　(2)　675-679　2007/03

    DOI： 10.2514/1.23236 　

    ISSN： 0021-8669

  291. 1305 Application of Data Mining Techniques to an Optimal Design Database for a Centrifugal Fan

    SUGIMURA Kazuyuki, OBAYASHI Shigeru, JEONG Shinkyu

    The proceedings of the JSME annual meeting　2007　165-166　2007

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2007.6.0_165 　

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    We applied data mining techniques (Decision Tree Analysis and Rough Set Theory) to an optimal design database in order to extract useful design rules. The database was created using data obtained by solving of a four-objective aerodynamic optimization problem for a centrifugal fan, in which three types of aerodynamic efficiencies and the turbulence noise level were optimized. The extracted rules are expressed in "if…, then…" form and can be used by designers to make decisions. We demonstrated that these data mining techniques can be used to select important design variables applicable to various design objectives. While Decision Tree Analysis derives a single statistical rule, to which the most sensitive design variables are related, Rough Set Theory derives multiple rules, with which even non-linear interactions among design variables can be taken into account. We confirmed that using several data mining techniques is necessary for correct understanding of the design problem.

  292. F09(2) ターボ機械の多目的設計探査(【F09】最適化技術の展開と応用(続編))

    杉村 和之, 岩瀬 幸司, 下山 幸治, 大林 茂, 鄭 信圭

    年次大会講演資料集　2007　222-223　2007

    Publisher: 一般社団法人日本機械学会

    DOI： 10.1299/jsmemecjsm.2007.8.0_222 　

  293. 3125 Efficient Multi-Objective Robust Design Optimization Coupled with Response Surface Approximation and Data-Mining

    SHIMOYAMA Koji, LIM Jin Ne, JEONG Shinkyu, OBAYASHI Shigeru

    The proceedings of the JSME annual meeting　2007　309-310　2007

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2007.6.0_309 　

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    A new approach for multi-objective robust design optimization has been proposed and applied to a real-world design problem with a large number of objective functions. The present approach is assisted by response surface approximation and visual data-mining, which results in two major gains regarding computational time and data interpretation. The Kriging model for response surface approximation can realize accurate predictions of robustness measures, and dramatically reduces the computational time for objective function evaluation. In addition, the use of self-organizing maps as a data-mining technique allows visualization of complicated design information between optimality and robustness of design in a comprehensible two-dimensional form. Therefore, the extraction and interpretation of trade-off relations between optimality and robustness of design, and also the location of sweet-spots in the design space, can be performed in a comprehensive manner.

  294. 1303 Feature Extraction from Design Space Using Rough Sets

    Obayashi Shigeru

    The proceedings of the JSME annual meeting　2007　161-162　2007

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2007.6.0_161 　

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    Data mining technique based on Rough Set theory has been applied to solutions obtained from three-objective optimization for regional jet wing design with engine nacelle. To reveal design tradeoffs, multiobjective optimization was performed by using Evolutionary Algorithms coupled with the Kriging model. High dimensional data (design parameters and the corresponding objective function values) are mapped onto the two-dimensional Self-Organizing Map (SOM) where global tradeoffs are visualized. The rule sets are derived by Rough Set theory so as to determine the importance of design parameters corresponding to the clusters obtained from SOM.

  295. 1304 Construction of a Data Mining Method for Unsteady Flow Field

    Obayashi Shigeru, Jeong Shinkyu, Shibasaki Takashi

    The proceedings of the JSME annual meeting　2007　163-164　2007

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2007.6.0_163 　

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    Large amounts of data regarding various physical phenomena can be acquired from CFD analysis of unsteady flow field. However, the post-process of the unsteady CFD data is usually performed by averaging each time-step data or by searching eventual correlations among points in the flow field. In those cases, most of the unsteady CFD data end up being unused. The objective of this work is to construct a Data Mining method for the post-process of unsteady CFD data. The Data Mining method in this study consists of a time-series analysis and a cluster analysis. The time dependent flow characteristics are extracted by the time-series analysis, while the features regarding space are extracted by the cluster analysis. The Data Mining method was applied to unsteady CFD data of base flow at transonic speed and it successfully captured instability of shear layer, shock wave and vortex shedding.

  296. Numerical simulation of clear air turbulence using 4D-var

    Takashi Misaka, Shigeru Obayashi, Eiichi Endou

    Collection of Technical Papers - 45th AIAA Aerospace Sciences Meeting　2　911-924　2007

    DOI： 10.2514/6.2007-81 　

  297. Multi-Objective Optimization in Aerospace Engineering Design

    Obayashi, S, Jeong, S, Shimoyama, K

    21st Century COE Program International COE of Flow Dynamics Lecture Series, Vol. 11, Tohoku University Press　11　159-191　2007

  298. Evolutionary multiobjective optimization of steel structural systems in tall buildings Peer-reviewed

    Rafal Kicinger, Shigeru Obayashi, Tomasz Arciszewski

    EVOLUTIONARY MULTI-CRITERION OPTIMIZATION, PROCEEDINGS　4403　604-+　2007

    ISSN： 0302-9743

  299. Multi-objective design exploration of a centrifugal impeller accompanied with a vaned diffuser Peer-reviewed

    Kazuyuki Sugimura, Shigeru Obayashi, Shinkyu Jeong

    FEDSM 2007: PROCEEDINGS OF THE 5TH JOINT ASME/JSME FLUIDS ENGINEERING SUMMER CONFERENCE, VOL 2, PTS A AND B　939-946　2007

    DOI： 10.1115/FEDSM2007-37502 　

  300. An approach for multi-objective robust optimization assisted by response surface approximation and visual data-mining Peer-reviewed

    Koji Shimoyama, Jin Ne Lim, Shinkyu Jeong, Shigeru Obayashi, Masataka Koishi

    2007 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION, VOLS 1-10, PROCEEDINGS　2413-+　2007

    DOI： 10.1109/CEC.2007.4424773 　

  301. 革新的計算科学技術への展望 Invited

    大林茂

    宇宙航空研究開発機構特別資料　16-19　2006/12

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    航空宇宙数値シミュレーション技術シンポジウム2006論文集

  302. 複葉超音速翼空力設計の現状と課題

    米澤誠仁, 山下博, 大林茂, 楠瀬一洋

    宇宙航空研究開発機構特別資料　101-106　2006/12

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    航空宇宙数値シミュレーション技術シンポジウム2006論文集

  303. Optimization of Combustion Chamber for Diesel Engine Using Kriging Model Peer-reviewed

    Shinkyu Jeong, Youichi Minemura, Shigeru Obayashi

    Journal of Fluid Science and Technology　1　(2)　138-146　2006/12

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jfst.1.138 　

    ISSN： 1880-5558

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    Diesel engine combustion chamber which reduces exhaust emission has been designed using CFD analysis and optimization techniques. In order to save computational time for design, the Kriging model, one of the response surface models, is adopted here. For a robust exploration, both the estimated function value of the model and its uncertainty are considered at the same time. In the present problem, the k-means method is used to limit the number of additional sample points to a reasonable level. Among the additional sample points, two combustion chamber shapes dominate the baseline configuration in terms of all objective functions. Compared with the previous optimization with the evolutionary algorithm, its computational time for design was cut by 95%. The results indicate that the present method is a practical approach for real-world applications.

  304. APPLICATION OF THE VARIABLE-FIDELITY MDO TOOLS TO A JET AIRCRAFT DESIGN Peer-reviewed

    Keita Hatanaka, Shigeru Obayashi, Jeong Shinkyu

    25TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES　2006/09

  305. A Kriging-based probabilistic optimization method with an adaptive search region Peer-reviewed

    S Jeong, S Obayashi, K Yamamoto

    ENGINEERING OPTIMIZATION　38　(5)　541-555　2006/07

    DOI： 10.1080/03052150600627073 　

    ISSN： 0305-215X

  306. Overset unstructured grids method for viscous flow computations Peer-reviewed

    Fumiya Togashi, Yasushi Ito, Kazuhiro Nakahashi, Shigeru Obayashi

    AIAA JOURNAL　44　(7)　1617-1623　2006/07

    DOI： 10.2514/1.4292 　

    ISSN： 0001-1452

  307. Design exploration of aerodynamic wing shape for reusable launch vehicle flyback booster Peer-reviewed

    K Chiba, S Obayashi, K Nakahashi

    JOURNAL OF AIRCRAFT　43　(3)　832-836　2006/05

    DOI： 10.2514/1.12782 　

    ISSN： 0021-8669

  308. Multi-Objective Optimization Using Kriging Model and Data Mining Peer-reviewed

    Shinkyu Jeong, Shigeru Obayashi

    KSAS International Journal　7　(1)　1-12　2006/05

  309. 再使用宇宙輸送機フライバックブースタ翼空力形状の設計探査 Peer-reviewed

    千葉一永, 大林 茂, 中橋和博

    日本航空宇宙学会論文集　54　(627)　144-150　2006/04

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.54.144 　

    ISSN： 1344-6460

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    The wing shape of flyback booster for a Two-Stage-To-Orbit reusable launch vehicle has been optimized considering four objectives. The objectives are to minimize the shift of aerodynamic center between supersonic and transonic conditions, transonic pitching moment and transonic drag coefficient, as well as to maximize subsonic lift coefficient. The three-dimensional Reynolds-averaged Navier-Stokes computation using the modified Spalart-Allmaras one-equation model is used in aerodynamic evaluation accounting for possible flow separations. Adaptive range multi-objective genetic algorithm is used for the present study because tradeoff can be obtained using a smaller number of individuals than conventional multi-objective genetic algorithms. Consequently, four-objective optimization has produced 102 non-dominated solutions, which represent tradeoff information among four objective functions. Moreover, Self-Organizing Maps have been used to analyze the present non-dominated solutions and to visualize tradeoffs and influence of design variables to the four objectives. Self-Organizing Maps contoured by the four objective functions and design variables are found to visualize tradeoffs and effects of each design variable.

  310. Tradeoff Analysis and Data Mining of Aerodynamic Wing Design for RLV Flyback Booster

    K.CHIBA, S.OBAYASHI, K.NAKAHASHI

    REPORTS OF THE INSTITUTE OF FLUID SCIENCE TOHOKU UNIVERSITY　17　2006/02/14

  311. Knowledge discovery in aerodynamic design space for flyback-booster wing using data mining

    Kazuhisa Chiba, Shinkyu Jeong, Shigeru Obayashi, Kazuomi Yamamoto

    A Collection of Technical Papers - 14th AIAA/AHI International Space Planes and Hypersonic Systems and Technologies Conference　1　806-823　2006

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2006-7992 　

  312. 3927 Aerodynamic Analyses of Supersonic Biplane for Avoiding the Choke Phenomenon

    Yamashita Hiroshi, Yonezawa Masahito, Obayashi Shigeru, Kusunose Kazuhiro

    The proceedings of the JSME annual meeting　2006　135-136　2006

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2006.7.0_135 　

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    One of the fundamental problems preventing commercial transport from going supersonic is the creation of Sonic Boom due to strong shock waves. Although it is nearly impossible to sufficiently reduce the shock waves generated by the aircraft designed conventionally to meet acceptable Sonic Boom levels at ground, it has been shown by the present authors that Sonic Boom can be reduced by using biplane. Here, the Busemann biplane is used as the basic shape of biplane configuration. Even though the Busemann biplane has a wide range of low wave drag, it has a choked flow phenomenon at off-design condition. Hence, we study methods for avoiding choked flow phenomenon for biplane by changing wing configuration. It was found that the configuration used in this research can alleviate the problem of sudden increase of the C_d value in choked flow phenomenon.

  313. 3928 Optimization and Data Mining to a Tire Noise Reduction Problem

    LIM Jin Ne, JEONG Shinkyu, OBAYASHI Shigeru, IKEDA Toshiyuki, KOISHI Masatoshi

    The proceedings of the JSME annual meeting　2006　137-138　2006

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2006.7.0_137 　

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    In this paper, Genetic Algorithm (GA) is adopted as the searching algorithm, and the Kriging model is used as the approximation model, for the study of the influence of the elasticity of the car tires on its noise performance. Finally, Self-Organizing Map (SOM) is used to study trade-off relationships between the objective functions.

  314. 3930 Data Mining of Flow with K-H Instability

    MISAKA Takashi, OBAYASHI Shigeru, ENDOU Eiichi

    The proceedings of the JSME annual meeting　2006　141-142　2006

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2006.7.0_141 　

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    A numerical simulation of Kelvin-Helmholtz (K-H) instability which is considered the major cause of clear air turbulence (CAT) is carried out. The Fourier analyses of velocity components are applied to extract a dominant vortex structure. A main vortex structure of K-H instability is reflected as peaks of spectrum for both horizontal and vertical velocities. Therefore, it is expected that the Fourier analysis of a horizontal velocity component is used to predict CAT.

  315. 遷音速翼に生ずる衝撃波による三次元剥離計算の可視化(三次元グラフィックシステムのイメージレコーダによる)

    藤井 孝蔵, 大林 茂, 白山 晋

    可視化情報学会誌　26　(100)　Plate35-Plate35　2006

    Publisher: The Visualization Society of Japan

    DOI： 10.3154/jvs.26.Plate35 　

    ISSN： 0916-4731

  316. Application of local correlation-based transition model to flows around wings

    Takashi Misaka, Shigeru Obayashi

    Collection of Technical Papers - 44th AIAA Aerospace Sciences Meeting　15　10973-10983　2006

    DOI： 10.2514/6.2006-918 　

  317. Knowledge Discovery in Aerodynamic Design Space using Data Mining Peer-reviewed

    Shinkyu Jeong, Sasaki Daisuke, Shigeru Obayashi

    The Korean Society for Aeronautical and Space Sciences　34　(1)　49-55　2006/01

  318. Extensions of overset unstructured grids to multiple bodies in contact Peer-reviewed

    F Togashi, Y Ito, K Nakahashi, S Obayashi

    JOURNAL OF AIRCRAFT　43　(1)　52-57　2006/01

    DOI： 10.2514/1.540 　

    ISSN： 0021-8669

  319. Aerodynamic optimization design with Kriging model Peer-reviewed

    S Jeong, S Obayashi, K Yamamoto

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　48　(161)　161-168　2005/11

    DOI： 10.2322/tjsass.48.161 　

    ISSN： 0549-3811

  320. Design under uncertainties of wings in, transonic field Peer-reviewed

    L Parussini, Pediroda, V, S Obayashi

    JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING　48　(2)　218-223　2005/05

    DOI： 10.1299/jsmeb.48.218 　

    ISSN： 1340-8054

  321. Drag characteristics of a low-drag low-boom supersonic formation flying concept

    Yuichiro Goto, Shigeru Obayashi, Yasuaki Kohama

    Collection of Technical Papers - AIAA Applied Aerodynamics Conference　1　57-68　2005

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2005-4604 　

    ISSN： 1048-5953

  322. 613 Multidisciplinary Design Optimization for Transonic Regional Jet Aircraft

    CHIBA Kazuhisa, OBAYASHI Shigeru, NAKAHASHI Kazuhiro, MORINO Hiroyuki

    The proceedings of the JSME annual meeting　2005　51-52　2005

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2005.6.0_51 　

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    A large-scale, real-world application of Evolutionary Multi-Objective Optimization is reported. The Multidisciplinary Design Optimization among aerodynamics, structures, and aeroelasticity of the transonic regional-jet wing was performed using high-fidelity evaluation models. Euler and Navier-Stokes solvers were employed for aerodynamic evaluation. The commercial software NASTRAN was coupled with a Computational Fluid Dynamics solver for the structural and aeroelastic evaluations. Adaptive Range Multi-Objective Genetic Algorithm was employed as an optimizer. The objective functions were minimizations of block fuel and maximum takeoff weight in addition to drag divergence between transonic and subsonic flight conditions. As a result, nine non-dominated solutions were generated and tradeoff information among three objectives was revealed.

  323. 320 Application of Fuzzy Decision Tree to Datasets Obtained by Evolutionary Algorithms (EAs)

    LIM Jin Ne, SASAKI Daisuke, JEONG Shinkyu, OBAYASHI Shigeru

    The proceedings of the JSME annual meeting　2005　9-10　2005

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2005.7.0_9 　

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    In this paper, the effectiveness of the Fuzzy Decision Tree as a data mining technique for datasets obtained by Evolutionary Algorithms, which is a preferred optimization technique for multi-objective problems, is investigated. The Fuzzy Decision Tree is constructed to evaluate the influence of design variables on the objective functions. Based on the results of the Fuzzy Decision Tree, designers can reduce the number of design variables and focus on the important design variables. The technique is applied to the aerodynamic optimization of a supersonic wing design which has four objective functions and 72 design variables.

  324. Tradeoff analysis of aerodynamic wing design for RLV Peer-reviewed

    K Chiba, S Obayashi, K Nakahashi

    Parallel Computational Fluid Dynamics: Multidisciplinary Applications　129-136　2005

  325. High-fidelity Multidisciplinary design optimization of wing shape for regional jet aircraft Peer-reviewed

    K Chiba, S Obayashi, K Nakahashi, H Morino

    EVOLUTIONARY MULTI-CRITERION OPTIMIZATION　3410　621-635　2005

    ISSN： 0302-9743

  326. Efficient Search for Trade-Offs by Adaptive Range Multi-Objective Genetic Algorithms Invited Peer-reviewed

    Daisuke Sasaki, Shigeru Obayashi

    Journal of Aerospace Computing, Information, and Communication　2　(1)　44-64　2005

    DOI： 10.2514/1.12909 　

  327. Data mining for aerodynamic design space Peer-reviewed

    Shinkyu Jeong, Kazuhisa Chiba, Shigeru Obayashi

    Journal of Aerospace Computing, Information and Communication　2　(11)　452-469　2005

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/1.17308 　

    ISSN： 1542-9423

  328. High-fidelity Multidisciplinary design optimization of wing shape for regional jet aircraft

    K Chiba, S Obayashi, K Nakahashi, H Morino

    EVOLUTIONARY MULTI-CRITERION OPTIMIZATION　3410　621-635　2005

    ISSN： 0302-9743

  329. 構造-非構造接続法によるNALジェット実験機機体統合超音速インテーク性能解析 Peer-reviewed

    金崎雅博, 藤原仁志, 伊藤靖, 藤田健, 大林茂, 中橋和博

    日本航空宇宙学会論文集　52　(607)　355-360　2004/08

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.52.355 　

    ISSN： 1344-6460

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    Numerical simulation method for the prediction of supersonic intake performance is discussed. To perform a practical simulation, it is necessary to consider not only the nacelle-only configuration but also the engine/airframe configuration. In this study, the unstructured mesh, known to have advantages with regard to adaptation to complex geometry, was generated around aircraft geometry and the Euler equation was solved. To obtain higher numerical accuracy for the shock wave/boundary layer interaction, which appears at the inlet, the structured Navier-Stokes solver was applied to solve flows inside the flow-through nacelle. These regions were coupled with using the unstructured-structured zonal approach. The nacelle-only configuration and the engine/airframe configuration were calculated using this method and the effects of the airframe existence on supersonic intake performance were investigated.

  330. CFD Visualization of Second Primary Vortex Structure on a 65-Degree Delta Wing

    K.CHIBA, S.OBAYASHI, K.NAKAHASHI

    REPORTS OF THE INSTITUTE OF FLUID SCIENCE TOHOKU UNVERSITY　16　1-10　2004/06

  331. Development of Efficient Multi-Objective Evolutionary Algorithms: ARMOGAs(Adaptive Range Multi-Objective Genetic Algorithms Peer-reviewed

    D.SASAKI, S.OBAYASHI

    REPORTS OF THE INSTITUTE OF FLUID SCIENCE TOHOKU UNVERSITY　16　11-18　2004/06

  332. Finding tradeoffs by using multiobjective optimization algorithms Peer-reviewed

    S Obayashi, D Sasaki, A Oyama

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　47　(155)　51-58　2004/05

    DOI： 10.2322/tjsass.47.51 　

    ISSN： 0549-3811

  333. Exhaust manifold design with tapered pipes using divided range MOGA Peer-reviewed

    M Kanazaki, S Obayashi, K Nakahashi

    ENGINEERING OPTIMIZATION　36　(2)　149-163　2004/04

    DOI： 10.1080/03052150310001639281 　

    ISSN： 0305-215X

  334. Automated aerodynamic optimization system for SST wing-body configuration Peer-reviewed

    D Sasaki, GW Yang, S Obayashi

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　46　(154)　230-237　2004/02

    DOI： 10.2322/tjsass.46.230 　

    ISSN： 0549-3811

  335. Simulation of aircraft wake vortex using pressure-based unified numerical approach for incompressible and compressible flows

    Yoshihiro Yamaguchi, Toshiyuki Arima, Shigeru Obayashi, Kazuhiro Nakahashi

    AIAA Paper　4035-4042　2004

  336. Multi-objective optimization for aerodynamic designs by using ARMOGAs Peer-reviewed

    S Obayashi, D Sasaki

    SEVENTH INTERNATIONAL CONFERENCE ON HIGH PERFORMANCE COMPUTING AND GRID IN ASIA PACIFIC REGION, PROCEEDINGS　396-403　2004

  337. Efficient Search for Trade-Offs by Adaptive Range Multi-Objective Genetic Algorithms Peer-reviewed

    Sasaki, D, Obayashi, S

    Journal of Aerospace Computing, Information, and Communication　2　(1)　44-64　2004/01

  338. Study on the use of high-fidelity methods in aeroelastic optimization Peer-reviewed

    Guru P. Guruswamy, Shigeru Obayashi

    Journal of Aircraft　41　(3)　616-619　2004

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/1.843 　

    ISSN： 0021-8669

  339. Transonic axial-flow blade optimization: Evolutionary algorithms/three- dimensional Navier-Stokes solver Peer-reviewed

    Akira Oyama, Meng-Sing Liou, Shigeru Obayashi

    Journal of Propulsion and Power　20　(4)　612-619　2004

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/1.2290 　

    ISSN： 0748-4658

  340. Numerical analyses of discrete gust response for an aircraft Peer-reviewed

    Guowei Yang, Shigeru Obayashi

    Journal of Aircraft　41　(6)　1353-1359　2004

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/1.2531 　

    ISSN： 0021-8669

  341. Aileron buzz simulation using an implicit multiblock aeroelastic solver Peer-reviewed

    GW Yang, S Obayashi, J Nakamichi

    JOURNAL OF AIRCRAFT　40　(3)　580-589　2003/05

    ISSN： 0021-8669

  342. High-fidelity swept and leaned rotor blade design optimization using evolutionary algorithm

    Akira Oyama, Meng-Sing Liou, Shigeru Obayashi

    16th AIAA Computational Fluid Dynamics Conference　2003

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2003-4091 　

  343. Low-boom design optimization for SST canard-wing-fuselage configuration

    Daisuke Sasaki, Shigeru Obayashi

    16th AIAA Computational Fluid Dynamics Conference　2003

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2003-3432 　

  344. Numerical analyses of discrete gust response for a flexible aircraft

    Guowei Yang, Shigeru Obayashi

    21st AIAA Applied Aerodynamics Conference　2003

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2003-3513 　

  345. Overset unstructured grids method for viscous flow computations

    Fumiya Togashi, Yasushi Ito, Kazuhiro Nakahashi, Shigeru Obayashi

    21st AIAA Applied Aerodynamics Conference　2003

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2003-3405 　

  346. Visual Data Mining for Vortex Structure of Leading-Edge Separation at High Reynolds Numbers

    Chiba Kazuhisa, Obayashi Shigeru

    The proceedings of the JSME annual meeting　2003　217-218　2003

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2003.6.0_217 　

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    Unstructured hybrid grids with 3 turbulence models are applied to simulate experiment about flows around delta wings with a blunt leading edge at Reynolds number of 6 millions. The modified S-A turbulence model is found effective to capture complex vortex structure. The second primary vortex at the inboard of the first primary vortex is captured numerically as reported in the experiment. Its structure is investigated by using CFD visualization.

  347. Multiobjective GA for SST wing-body shape design Peer-reviewed

    D Sasaki, GW Yang, S Obayashi

    PARALLEL COMPUTATIONAL FLUID DYNAMICS: NEW FRONTIERS AND MULTI-DISCIPLINARY APPLICATIONS, PROCEEDINGS　515-522　2003

  348. Exhaust manifold design for a car engine based on engine cycle simulation Peer-reviewed

    M Kanazaki, M Morikawa, S Obayashi, K Nakahashi

    PARALLEL COMPUTATIONAL FLUID DYNAMICS: NEW FRONTIERS AND MULTI-DISCIPLINARY APPLICATIONS, PROCEEDINGS　475-482　2003

  349. Validation of Drag Estimation on Wing-Fuselage Configurations for a Navier-Stokes Solver

    M. Kondo, G. Yang, S. Obayashi

    AIAA Paper　2003-0597　2003

  350. Numerical Simulation of Supersonic Flow around Wing-Body Configuration with Integrated Engine Nacelle Peer-reviewed

    M. Kanazaki, H. Fujiwara, S. Obayashi, K. Nakahashi

    日本航空宇宙学会論文集　51　(588)　31-35　2003/01

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.51.31 　

    ISSN： 1344-6460

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    This paper presents numerical simulation of flowfields around a supersonic transport aircraft with integrated engine nacelles. In this study, flowfields were simulated by solving the Euler equations with the unstructured grid method for handling the complex geometry. To simulate intake flows at actual flight conditions, a bump was introduced inside the nacelle. The effect of nacelle mass flow ratios on overall aerodynamic performance was investigated in detail by changing bump heights. The spillage drag was calculated and found to have a large impact on the total drag. Computed results showed excellent agreements with wind tunnel data obtained at National Aerospace Laboratory of Japan.

  351. Visualization and data mining of Pareto solutions using self-organizing map Peer-reviewed

    S Obayashi, D Sasaki

    EVOLUTIONARY MULTI-CRITERION OPTIMIZATION, PROCEEDINGS　2632　796-809　2003

    ISSN： 0302-9743

  352. Multiobjective Design Optimization of Merging Configuration for an Exhaust Manifold of a Car Engine Peer-reviewed

    M. Kanazaki, S. Obayashi, M. Morikawa, K. Nakahashi

    Parallel Problem Solving from Nature - PPSN VII, Guervos, Admidis, Beyer, Fernandez-Villacanas and Schwefel (Eds.), Lecture Notes in Computer Science　2439　281-287　2002/09

  353. Navier-Stokes optimization of supersonic wings with four objectives using evolutionary algorithm Peer-reviewed

    D Sasaki, S Obayashi, K Nakahashi

    JOURNAL OF AIRCRAFT　39　(4)　621-629　2002/07

    DOI： 10.2514/2.2974 　

    ISSN： 0021-8669

  354. 進化的計算法による空力設計の最適化 Peer-reviewed

    大林茂

    ターボ機械　30　(5)　257-262　2002/05

    DOI： 10.11458/tsj1973.30.257 　

  355. 2次元翼型失速限界のCFD予測 Peer-reviewed

    蓮池尚彦, 大山聖, 中橋和博, 大林茂

    日本航空宇宙学会論文集　50　(577)　56-63　2002/02

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.50.56 　

    ISSN： 1344-6460

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    Two-dimensional Navier-Stokes simulations have been performed for three types of flows at stall conditions about NACA633-018, NACA631-012 and NACA64A-006 airfoils. The Baldwin-Lomax algebraic eddy-viscosity model was applied in three different manners. First, a fully turbulent flow was assumed. Second, a transition point from laminar to turbulent was set manually. Third, the Degani-Schiff modification was applied. The fully turbulent computations predicted maximum lift coefficients much higher than experiment in all the cases, while the computations agreed well with experiment when specifying transition points properly. The computations with the Degani-Schiff modification predicted the stall angle close to experiment, but showed different behaviors at post-stall conditions. It is important to capture a laminar separation bubble at the leading-edge for predicting stall angles and post-stall behaviors correctly.

  356. Multiblock Navier-Stokes solver for wing/fuselage transport aircraft Peer-reviewed

    GW Yang, M Kondo, S Obayashi

    JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING　45　(1)　85-90　2002/02

    DOI： 10.1299/jsmeb.45.85 　

    ISSN： 1340-8054

  357. CFD利用の新段階－数値最適化 Peer-reviewed

    大林茂

    日本機械学会誌　105　(999)　2-7　2002/02

  358. Extensions of overset unstructured grids to multiple bodies in contact

    Fumiya Togashi, Yasushi Ito, Kazuhiro Nakahashi, Shigeru Obayashi

    20th AIAA Applied Aerodynamics Conference　2002

    Publisher: American Institute of Aeronautics and Astronautics Inc.

    DOI： 10.2514/6.2002-2809 　

  359. Use of high fidelity methods in multidisciplinary optimization - A preliminary study

    Guru P. Guruswamy, Shigeru Obayashi

    9th AIAA/ISSMO Symposium on Multidisciplinary Analysis and Optimization　2002

    Publisher: American Institute of Aeronautics and Astronautics Inc.

  360. Self-organizing map of pareto solutions obtained from multiobjective supersonic wing design

    Shigeru Obayashi, Daisuke Sasaki

    40th AIAA Aerospace Sciences Meeting and Exhibit　2002

  361. Design Datamining Based on Self-Organizing Map

    Obayashi Shigeru

    The proceedings of the JSME annual meeting　2002　23-24　2002

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2002.7.0_23 　

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    Self-Organizing Map (SOM) has been applied to analyze exhaust manifold design solutions obtained during multiobjective optimization using Evolutionary Algorithms. All the numerical data (design variables and the corresponding objective function values) are mapped onto the two-dimensional SOM where global tradeoffs are successfully visualized. SOM is confirmed to be a versatile datamining tool for fluid engineering.

  362. Aerodynamic optimization of transonic wing design based on evolutionary algorithm Peer-reviewed

    A Oyama, S Obayashi, K Nakahashi, T Nakamura

    THIRD INTERNATIONAL CONFERENCE ON NONLINEAR PROBLEMS IN AVIATION AND AEROSPACE, VOLS 1 AND 2, PROCEEDINGS　537-546　2002

  363. Navier-Stokes optimization of supersonic wings with four objectives using evolutionary algorithm Peer-reviewed

    Daisuke Sasaki, Shigeru Obayashi, Kazuhiro Nakahashi

    Journal of Aircraft　39　(4)　621-629　2002

    Publisher: American Inst. Aeronautics and Astronautics Inc.

    DOI： 10.2514/2.2974 　

    ISSN： 0021-8669

  364. Flap-deflection optimization for transonic cruise performance improvement of supersonic transport wing Peer-reviewed

    HJ Kim, S Obayashi, K Nakahashi

    JOURNAL OF AIRCRAFT　38　(4)　709-717　2001/07

    DOI： 10.2514/2.2823 　

    ISSN： 0021-8669

    eISSN： 1533-3868

  365. Aerodynamic optimization of supersonic transport wing using unstructured adjoint method Peer-reviewed

    HJ Kim, D Sasaki, S Obayashi, K Nakahashi

    AIAA JOURNAL　39　(6)　1011-1020　2001/06

    DOI： 10.2514/2.1441 　

    ISSN： 0001-1452

  366. 超音速リージョナルジェット機 Peer-reviewed

    大林茂

    日本航空宇宙学会誌　49　(568)　110-114　2001/05

  367. Numerical Simulation of Vortical Flows Using Vorticity Confinement Coupled with Unstructured Adaptive Grid Refinement Peer-reviewed

    M. Murayama, K. Nakahashi, S. Obayashi, T. Kato

    Computational Fluid Dynamics Journal　10　(1)　28-36　2001/04

  368. Aerodynamic optimization of supersonic transport wing using unstructured adjoint method Peer-reviewed

    HJ Kim, D Sasaki, S Obayashi, K Nakahashi

    COMPUTATIONAL FLUID DYNAMICS 2000　581-586　2001

  369. Real-coded adaptive range genetic algorithm applied to taransonic wing optimization Peer-reviewed

    A. Oyama, S. Obayashi, T. Nakamura

    Applied Soft Computing　1　179-187　2001/01

  370. Aerodynamic shape optimization of supersonic wings by Adaptive Range Multiobjective Genetic Algorithms Peer-reviewed

    D Sasaki, M Morikawa, S Obayashi, K Nakahashi

    EVOLUTIONARY MULTI-CRITERION OPTIMIZATION, PROCEEDINGS　1993　639-652　2001

    ISSN： 0302-9743

  371. Design optimization of exhaust manifold for a car engine using MOGA Peer-reviewed

    Masahiro Kanazaki, Shigeru Obayashi, Kazuhiro Nakahashi

    Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B　67　(663)　2746-2753　2001

    Publisher: Japan Society of Mechanical Engineers

    DOI： 10.1299/kikaib.67.2746 　

    ISSN： 0387-5016

  372. Real-coded adaptive range genetic algorithm applied to transonic wing optimization Peer-reviewed

    Akira Oyama, Shigeru Obayashi, Takashi Nakamura

    Applied Soft Computing　1　(3)　179-187　2001

    Publisher: Elsevier

    DOI： 10.1016/S1568-4946(01)00017-5 　

    ISSN： 1568-4946

  373. Inverse design of a thick supercritical airfoil Peer-reviewed

    TE Pambagjo, K Nakahashi, S Obayashi

    TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　43　(140)　61-66　2000/08

    DOI： 10.2322/tjsass.43.61 　

    ISSN： 0549-3811

  374. Multiobjective evolutionary computation for supersonic wing-shape optimization Peer-reviewed

    S Obayashi, D Sasaki, Y Takeguchi, N Hirose

    IEEE TRANSACTIONS ON EVOLUTIONARY COMPUTATION　4　(2)　182-187　2000/07

    DOI： 10.1109/4235.850658 　

    ISSN： 1089-778X

  375. 流体機械のGAを用いた最適化 Peer-reviewed

    大林茂

    講習会「ここまでできる機械の最適化」, 日本機械学会　7-17　2000/07

  376. Real-coded adaptive range genetic algorithm and its application to aerodynamic design Peer-reviewed

    A Oyama, S Obayashi, K Nakahashi

    JSME INTERNATIONAL JOURNAL SERIES A-SOLID MECHANICS AND MATERIAL ENGINEERING　43　(2)　124-129　2000/04

    DOI： 10.1299/jsmea.43.124 　

    ISSN： 1344-7912

  377. Multiobjective genetic algorithm applied to aerodynamic design of cascade airfoils Peer-reviewed

    S Obayashi, T Tsukahara, T Nakamura

    IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS　47　(1)　211-216　2000/02

    DOI： 10.1109/41.824144 　

    ISSN： 0278-0046

    eISSN： 1557-9948

  378. Real-coded adaptive range genetic algorithm applied to transonic wing optimization

    Akira Oyama, Shigeru Obayashi, Takashi Nakamura

    Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)　1917　712-721　2000

    Publisher: Springer Verlag

    DOI： 10.1007/3-540-45356-3_70 　

    ISSN： 1611-3349 0302-9743

  379. Transonic wing shape optimization based on evolutionary algorithms Peer-reviewed

    S Obayashi, A Oyama, T Nakamura

    HIGH PERFORMANCE COMPUTING, PROCEEDINGS　1940　172-181　2000

    ISSN： 0302-9743

  380. AerodynamicWing Optimization via Evolutionary Algorithms Based on Structured Coding Peer-reviewed

    A. Oyama, S. Obayashi, K. Nakahashi, N. Hirose

    Computational Fluid Dynamics Journal　8　(1)　570--577　2000/01

  381. 次世代超音速輸送機主翼の超音速と遷音速巡航の多目的最適化 Peer-reviewed

    佐々木大輔, 竹口幸宏, 大林茂, 中橋和博, 広瀬直喜

    日本航空宇宙学会誌　47　(551)　464-469　1999/12

    Publisher:

    DOI： 10.2322/jjsass.47.464 　

    ISSN： 1344-6460

  382. 多目的遺伝的アルゴリズムによる空力最適設計 Peer-reviewed

    大林茂

    試験水槽委員会シンポジウム「船型設計と流力最適化問題」, 日本造船学会　111-140　1999/12

    Publisher:

  383. Inverse design optimization of transonic wings based on multi-objective genetic algorithms Peer-reviewed

    S Takahashi, S Obayashi, K Nakahashi

    AIAA JOURNAL　37　(12)　1656-1662　1999/12

    ISSN： 0001-1452

  384. Euler/Navier-Stokes optimization of supersonic wing design eased on evolutionary algorithm Peer-reviewed

    A Oyama, S Obayashi, K Nakahashi, T Nakamura

    AIAA JOURNAL　37　(10)　1327-1328　1999/10

    ISSN： 0001-1452

  385. Inverse design of supersonic airfoils using integral equations Peer-reviewed

    S Jeong, K Matsushima, T Iwamiya, S Obayashi, K Nakahashi

    JOURNAL OF AIRCRAFT　36　(3)　606-608　1999/05

    ISSN： 0021-8669

  386. On a question raised at the paper "a consideration on the convergency of approximate Riemann solver of Roe"

    JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　47　(541)　95-96　1999/02/05

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.47.95 　

    ISSN： 1344-6460

  387. Fractional factorial design of genetic coding for aerodynamic optimization

    Akira Oyama, Shigeru Obayashi, Kazuhiro Nakahashi, Naoki Hirose

    14th Computational Fluid Dynamics Conference　429-439　1999

    Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA

  388. Wing design using real-coded adaptive range genetic algorithm

    A. Oyama, S. Obayashi, K. Nakahashi

    Proceedings of the IEEE International Conference on Systems, Man and Cybernetics　4　1999

    Publisher: IEEE

    ISSN： 0884-3627

  389. Evolutionary computation of supersonic wing shape optimization Peer-reviewed

    S Obayashi, D Sasaki, Y Takeguchi

    GECCO-99: PROCEEDINGS OF THE GENETIC AND EVOLUTIONARY COMPUTATION CONFERENCE　1791-1791　1999

  390. Inverse optimization of supersonic wing design with twist specification Peer-reviewed

    S Jeong, S Obayashi, K Nakahashi

    INVERSE PROBLEMS IN ENGINEERING　7　(6)　519-535　1999

    ISSN： 1068-2767

  391. 遺伝的アルゴリズムを用いた三次元翼の空力最適化 Peer-reviewed

    大山聖, 大林茂, 中橋和博, 中村孝

    日本航空宇宙学会誌　46　(539)　32-36　1998/12

    DOI： 10.2322/jjsass1969.46.682 　

  392. 座談会「流体力学の基礎教育」 Peer-reviewed

    大橋正和, 大林茂, 笠木伸英, 木村龍治, 酒井敏, 巽友正, 谷田好通, 長谷川達也, 林光一, 山田日出夫

    ながれ　17　(2)　86-116　1998/04

    Publisher:

    ISSN： 0286-3154

  393. これからの数値流体力学教育 Peer-reviewed

    大林茂

    ながれ　17　(2)　128-133　1998/04

    Publisher: The Japan Society of Fluid Mechanics

    DOI： 10.11426/nagare1982.17.128 　

    ISSN： 0286-3154

  394. 進化アルゴリズムによる空力最適化II Peer-reviewed

    大林茂, 塚原孝則

    数値流体力学　6　(3)　83-97　1998/04

  395. Inverse optimization of transonic wing shape for mid-size regional aircraft

    Shinichi Takahashi, Shigeru Obayashi, Kazuhiro Nakahashi

    36th AIAA Aerospace Sciences Meeting and Exhibit　1998

    Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA

    DOI： 10.2514/6.1998-601 　

  396. Inverse Optimization of Transonic Wing Design Using Multiobjective Genetic Algorithms Peer-reviewed

    Shinichi Takahashi, Shigeru Obayashi, Kazuhiro Nakahashi

    Inverse Problems in Engineering　6　317-330　1998

  397. Iterative Design Method for Supersonic Wings Using Integral Equations Peer-reviewed

    S. Jeong, S. Obayashi, K. Nakahashi, K. Matsushima, T. Iwamiya

    Computational Fluid Dynamics Journal　7　(3)　365-374　1998

  398. Supersonic inverse design method for wing-fuselage design Peer-reviewed

    S Jeong, S Obayashi, K Nakahashi, T Iwamiya, K Matsushima

    INVERSE PROBLEMS IN ENGINEERING MECHANICS　381-389　1998

  399. A Coarse Grid Generation Algorithm for Agglomeration Multigrid Method on Unstructured Gridstured Grid

    N. Okamoto, K. Nakahashi, S. Obayashi

    AIAA Paper　98　(0615)　1998/01

  400. 進化アルゴリズムによる空力最適化Ｉ Peer-reviewed

    大林茂, 塚原孝則

    数値流体力学　6　(2)　59-73　1998/01

  401. Niching and elitist models for MOGAs Peer-reviewed

    S Obayashi, S Takahashi, Y Takeguchi

    PARALLEL PROBLEM SOLVING FROM NATURE - PPSN V　1498　260-269　1998

    ISSN： 0302-9743

  402. Multiobjective Genetic Algorithm for multidisciplinary design of transonic wing planform Peer-reviewed

    S Obayashi, Y Yamaguchi, T Nakamura

    JOURNAL OF AIRCRAFT　34　(5)　690-693　1997/09

    ISSN： 0021-8669

  403. Cascade Airfoil Design by Multiobjective Genetic Algorithms Peer-reviewed

    Shigeru Obayashi, Takanori Tsukahara, Takashi Nakamura

    Proceedings of Second International Conference on Genetic Algorithms in Engineering Systems　(446)　24-29　1997/09

  404. Comparison of optimization algorithms for aerodynamic shape design Peer-reviewed

    S Obayashi, T Tsukahara

    AIAA JOURNAL　35　(8)　1413-1415　1997/08

    ISSN： 0001-1452

  405. Transonic Shock-Free Wing Design with Multiobjective Genetic Algorithms Peer-reviewed

    Shinichi Takahashi, Shigeru Obayashi, Kazuhiro Nakahashi

    Proceedings of the International Conference on Fluid Engineering　1　425-429　1997/07

  406. Unstructured Multigrid Method for Euler Equations Peer-reviewed

    Nobuyuki Okamoto, Kazuhiro Nakahashi, Shigeru Obayashi

    Proceedings of the International Conference on Fluid Engineering　2　801-805　1997/07

  407. Transonic Wing Optimization Using Genetic Algorithm Peer-reviewed

    Akira Oyama, Shigeru Obayashi, Kazuhiro Nakahashi, Takashi Nakamura

    Proceedings of AIAA 13th Computational Fluid Dynamics Conference　1997/06

  408. Boundary Layer Ingestion Effect on SCRAM Jet Inlet Peer-reviewed

    M. Kodera, K. Nkahashi, S. Obayashi, T. Kanda, T. Mitani

    日本航空宇宙学会誌　45　(519)　216-221　1997/04

    Publisher: The Japan Society for Aeronautical and Space Sciences

    DOI： 10.2322/jjsass1969.45.216 　

    ISSN： 0021-4663

    More details Close

    Flowfields about a scramjet inlet model were numerically simulated by the Thin-Layer Navier-Stokes equations, and effect of inflow boundary layer thickness was investigated. The computations were conducted for inflow Mach number of 3.4. Although pressure at the throat region is relatively constant for various boundary layer thickness, corresponding flow pattern near the top wall was very different to each other, and the total pressure recovery decreased with the boundary layer thickness. The spilled impulse function increased with the thickness of inflow boundary layer, and stream thrust function of the spilled air slightly increased with the boundary layer thickness. The tendency was due to the increase of the separating region with the boundary layer thickness.

  409. On the fluid dynamic problems for aerodynamic optimizati Peer-reviewed

    塚原孝則, 大林茂, 中橋和博

    ながれ，日本流体力学会誌　16　(2)　120-127　1997/04

    Publisher:

    DOI： 10.11426/nagare1982.16.120 　

    ISSN： 0286-3154

  410. New blunt trailing-edge airfoil design by inverse optimization method Peer-reviewed

    S Obayashi, SY Jeong, Y Matsuo

    JOURNAL OF AIRCRAFT　34　(2)　255-257　1997/03

    ISSN： 0021-8669

  411. Aerodynamic Optimization with Evolutionary Algorithms Peer-reviewed

    S. Obayashi

    Proceedings of UKACC International Conference on Control '96　687-692　1996/09

  412. Inverse Optimization Method for Blunt Trailing-Edge Airfoils Peer-reviewed

    S. Obayashi, S. Jeong, Y. Matsuo

    Proceedings of the 15th International Conference on Numerical Methods　206-211　1996/06

  413. Genetic optimization of target pressure distributions for inverse design methods Peer-reviewed

    S Obayashi, S Takanashi

    AIAA JOURNAL　34　(5)　881-886　1996/05

    ISSN： 0001-1452

  414. Genetic optimization of target pressure distributions for inverse design methods Peer-reviewed

    Shigeru Obayashi, Susumu Takanashi

    AIAA Journal　34　(5)　881-886　1996

    Publisher: American Inst. Aeronautics and Astronautics Inc.

    DOI： 10.2514/3.13163 　

    ISSN： 0001-1452

  415. Three-dimensional aerodynamic optimization with genetic algorithm Peer-reviewed

    S Obayashi, A Oyama

    COMPUTATIONAL FLUID DYNAMICS '96　420-424　1996

  416. Navier-Stokes computations on full wing-body configuration with oscillating control surfaces Peer-reviewed

    S Obayashi, IT Chiu, GP Guruswamy

    JOURNAL OF AIRCRAFT　32　(6)　1227-1233　1995/11

    ISSN： 0021-8669

  417. Genetic Algorithm for Aerodynamic Inverse Optimization Problems Peer-reviewed

    S. Obayashi, S. Takahashi

    IEE Conference Publication No. 414　1995/09

  418. CONVERGENCE ACCELERATION OF A NAVIER-STOKES SOLVER FOR EFFICIENT STATIC AEROELASTIC COMPUTATIONS Peer-reviewed

    S OBAYASHI, GP GURUSWAMY

    AIAA JOURNAL　33　(6)　1134-1141　1995/06

    ISSN： 0001-1452

  419. PRACTICAL FORMULATION OF A POSITIVELY CONSERVATIVE SCHEME Peer-reviewed

    S OBAYASHI, Y WADA

    AIAA JOURNAL　32　(5)　1093-1095　1994/05

    DOI： 10.2514/3.12104 　

    ISSN： 0001-1452

  420. NAVIER-STOKES COMPUTATIONS FOR OSCILLATING CONTROL SURFACES Peer-reviewed

    S OBAYASHI, GP GURUSWAMY

    JOURNAL OF AIRCRAFT　31　(3)　631-636　1994/05

    ISSN： 0021-8669

  421. Aerodynamic inverse optimization with genetic algorithms Peer-reviewed

    S Obayashi

    PROCEEDINGS OF THE IEEE INTERNATIONAL CONFERENCE ON INDUSTRIAL TECHNOLOGY (ICIT'96)　421-425　1994

  422. Progress in Computational Unsteady Aerodynamics Peer-reviewed

    S. Obayashi

    The 7th Computational Fluid Dynamics Symposium　1993/12

  423. HIGHER-ORDER ACCURACY FOR UPWIND METHODS BY USING THE COMPATIBILITY EQUATIONS Peer-reviewed

    PM GOORJIAN, S OBAYASHI

    AIAA JOURNAL　31　(2)　251-256　1993/02

    ISSN： 0001-1452

  424. VIRTUAL ZONE NAVIER-STOKES COMPUTATIONS FOR OSCILLATING CONTROL SURFACES Peer-reviewed

    G. H. Klopfer, S. Obayashi

    AIAA 11th Computational Fluid Dynamics Conference,AIAA-93 -3363　711-721　1993

  425. FLOWFIELD OF A LIFTING ROTOR IN HOVER - A NAVIER-STOKES SIMULATION Peer-reviewed

    GR SRINIVASAN, JD BAEDER, S OBAYASHI, WJ MCCROSKEY

    AIAA JOURNAL　30　(10)　2371-2378　1992/10

    ISSN： 0001-1452

  426. UNSTEADY SHOCK-VORTEX INTERACTION ON A FLEXIBLE DELTA-WING Peer-reviewed

    S OBAYASHI, GP GURUSWAMY

    JOURNAL OF AIRCRAFT　29　(5)　790-798　1992/09

    ISSN： 0021-8669

  427. FREESTREAM CAPTURING FOR MOVING COORDINATES IN 3 DIMENSIONS Peer-reviewed

    S OBAYASHI

    AIAA JOURNAL　30　(4)　1125-1128　1992/04

    ISSN： 0001-1452

  428. STREAMWISE UPWIND ALGORITHM FOR COMPUTING UNSTEADY TRANSONIC-FLOWS PAST OSCILLATING WINGS Peer-reviewed

    S OBAYASHI, GP GURUSWAMY, PM GOORJIAN

    AIAA JOURNAL　29　(10)　1668-1677　1991/10

    ISSN： 0001-1452

  429. NUMERICAL-SOLUTIONS OF FORWARD-FLIGHT ROTOR FLOW USING AN UPWIND METHOD Peer-reviewed

    CL CHEN, WJ MCCROSKEY, S OBAYASHI

    JOURNAL OF AIRCRAFT　28　(6)　374-380　1991/06

    ISSN： 0021-8669

  430. UNSTEADY NAVIER-STOKES COMPUTATIONS ON A WING-BODY CONFIGURATION IN RAMP MOTIONS Peer-reviewed

    S OBAYASHI, GP GURUSWAMY, EL TU

    1991 ATMOSPHERIC FLIGHT MECHANICS CONFERENCE　167-176　1991

  431. STREAMWISE UPWIND ALGORITHM DEVELOPMENT FOR THE NAVIER-STOKES EQUATIONS Peer-reviewed

    Peter M. Goorjian, Shigeru Obayashi, Guru P. Guruswamy

    Proc.12th Int.Conf.on Numerical Methods in Fluid Dynamics, Lec.Notes in Physics　371　377-378　1991

  432. TRANSONIC AEROELASTIC COMPUTATIONS ON WINGS USING NAVIER-STOKES EQUATIONS Peer-reviewed

    Guru P. Guruswamy, Shigeru Obayashi

    AGARD Conference Proceedings 507,Transonic Unsteady Aerodyna mic and Aeroelastici　22-1-22-22　1991

  433. HIGHER-ORDER ACCURACY FOR UPWIND METHODS BY USING THE COMPATIBILITY EQUATIONS Peer-reviewed

    PM GOORJIAN, S OBAYASHI

    AIAA 10TH COMPUTATIONAL FLUID DYNAMICS CONFERENCE　181-189　1991

  434. UNSTEADY SHOCK-VORTEX INTERACTION ON A FLEXIBLE DELTA WING Peer-reviewed

    S OBAYASHI, GP GURUSWAMY

    AIAA/ASME/ASCE/AHS/ACS 32ND STRUCTURES, STRUCTURAL DYNAMICS, AND MATERIALS CONFERENCE, A COLLECTION OF TECHNICAL PAPERS,, PTS 1-4　1929-1950　1991

  435. Extension of a Streamwise Upwind Algorithm to a Moving Grid System Peer-reviewed

    Shigeru Obayashi, Peter M. Goorjian, Guru P. Guruswamy

    NASA Technical Memorandum 102800　1990

  436. A Streamwise Upwind Algorithm Applied to Vortical Flow Over a Delta Wing Peer-reviewed

    P. M. Goorjian, S. Obayashi

    Proceedings of the 8th GAMM Conference on Numerical Methods in Fluid Dynamics　29　1990

  437. HIGH-RESOLUTION UPWIND SCHEME FOR VORTICAL-FLOW SIMULATIONS Peer-reviewed

    K FUJII, S OBAYASHI

    JOURNAL OF AIRCRAFT　26　(12)　1123-1129　1989/12

    DOI： 10.2514/3.45890 　

    ISSN： 0021-8669

  438. IMPROVEMENTS AND APPLICATIONS OF A STREAMWISE UPWIND ALGORITHM Peer-reviewed

    S OBAYASHI, PM GOORJIAN

    AIAA 9TH COMPUTATIONAL FLUID DYNAMICS CONFERENCE　292-302　1989

  439. FLOWFIELD SIMULATION OF THE SPACE SHUTTLE VEHICLE IN ASCENT Peer-reviewed

    P. G. Buning, I. T. Chiu, F. W. Martin Jr, S. Obayashi, Y. M. Rizk, J. L. Steger, M. Yarrow

    PROCEEDINGS OF THE FOURTH INTERNATIONAL CONFERENCE ON SUPERCOMPUTING　20-28　1989

  440. USE OF HIGH-RESOLUTION UPWIND SCHEME FOR VORTICAL FLOW SIMULATIONS Peer-reviewed

    K FUJII, S OBAYASHI

    AIAA 9TH COMPUTATIONAL FLUID DYNAMICS CONFERENCE　270-279　1989

  441. NAVIER-STOKES SIMULATION OF WIND TUNNEL FLOW USING LU-ADI FRACTRIZATION ALGORITHM Peer-reviewed

    Shigeru Obayashi, Kozo Fujii, Sharad Gavali

    Nume.Sim.Transonic DFVLR-F5 Wing Exper,Notes on Nume.Fluid Mech,Wilhelm Kordull　22　200-225　1988

  442. THREE-DIMENSIONAL SIMULATION OF UNDEREXPANDED PLUMES USING UPWIND ALGORITHMS Peer-reviewed

    Shigeru Obayashi, Sharad Gavali

    Proceedings Supercomputing 88　2　25-33　1988

  443. NAVIER-STOKES SIMULATIONS OF TRANSONIC-FLOWS OVER A WING-FUSELAGE COMBINATION Peer-reviewed

    K FUJII, S OBAYASHI

    AIAA JOURNAL　25　(12)　1587-1596　1987/12

    ISSN： 0001-1452

  444. NAVIER-STOKES SIMULATIONS OF TRANSONIC-FLOWS OVER A PRACTICAL WING CONFIGURATION Peer-reviewed

    K FUJII, S OBAYASHI

    AIAA JOURNAL　25　(3)　369-370　1987/03

    ISSN： 0001-1452

  445. Numerical simulation of compressible viscous flows around practical aircraft configurations

    S. Takanashi, S. Obayashi, K. Matsushima, K. Fujii

    5th Applied Aerodynamics Conference, 1987　1987

    Publisher: American Institute of Aeronautics and Astronautics Inc, AIAA

  446. Viscous Flow Computations Using a Composite Grid Peer-reviewed

    Kazuhiro Nakahashi, Shigeru Obayashi

    AIAA 8th Computational Fluid Dynamics Conference,AIAA-87 -1128　87　303-312　1987

  447. AN APPROXIMATE LU FACTORIZATION METHOD FOR THE COMPRESSIBLE NAVIER-STOKES EQUATIONS Peer-reviewed

    S OBAYASHI, K KUWAHARA

    JOURNAL OF COMPUTATIONAL PHYSICS　63　(1)　157-167　1986/03

    DOI： 10.1016/0021-9991(86)90089-6 　

    ISSN： 0021-9991

  448. 遷音速翼に生ずる衝撃波による三次元剥離計算の可視化(三次元グラフィックシステムのイメージレコーダによる)

    藤井 孝蔵, 大林 茂, 白山 晋

    流れの可視化　6　(21)　157-157_1　1986

    Publisher: THE VISUALIZATION SOCIETY OF JAPAN

    DOI： 10.3154/jvs1981.6.157 　

    ISSN： 0287-3605

  449. Computational methods for the Compressible Navier-Stokes Equations 2 Peer-reviewed

    Shigeru Obayashi, Kunio Kuwahara

    Nagare, Journal of Japan Society of Fluid Mechanics　5　199-209　1986

    DOI： 10.11426/nagare1982.5.199 　

  450. 圧縮性Navier-Stokes方程式の数値計算法 I Peer-reviewed

    大林茂, 桑原邦郎

    ながれ　5　130-146　1986

    DOI： 10.11426/nagare1982.5.130 　

  451. Computation of Three-Dimensional Viscous Transonic Flows with the LU Factored Scheme Peer-reviewed

    S. Obayashi, K.Fujii

    AIAA 7th Computational Fluid Dynamics Conference,AIAA-85 -1510　192-202　1985

  452. A NEW LU FACTORED METHOD FOR THE COMPRESSIBLE NAVIER-STOKES EQUATIONS Peer-reviewed

    S OBAYASHI, K KUWAHARA, Y YOSHIZAWA

    LECTURE NOTES IN PHYSICS　218　432-436　1985

    ISSN： 0075-8450

  453. New Diagonal Implicit Scheme for the Compressible Navier-Stokes Equations Peer-reviewed

    Shigeru Obayashi, Kunio Kuwahara

    AIAA 6th COMPUTATIONAL FLUID DYNAMIC CONFERENCE,AIAA-83-1891　560-566　1983/07

  454. 2-POINT IMPLICIT SCHEME FOR THE EULER EQUATIONS Peer-reviewed

    S OBAYASHI, K KUWAHARA

    JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN　52　(5)　1525-1530　1983

    DOI： 10.1143/JPSJ.52.1525 　

    ISSN： 0031-9015

Show all ︎Show first 5

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    44　(2)　155-160　2025/06/01

  2. 社会に受け入れられる小型超音速機の考察 Invited

    大林 茂, 堀之内茂, 柳 良二, 鵜飼崇志

    日本航空宇宙学会誌　72　(9)　1-8　2024/09

    DOI： 10.14822/kjsass.72.9_319 　

  3. Numerical Prediction of Heat Flux of Cartesian Mesh CFD in Supersonic/Hypersonic Flows

    佐々木大輔, 下山幸治, 森合秀樹, 大林茂, 森浩一, 小川秦一郎, 高橋俊, 山田剛治

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書(CD-ROM)　2022　2023

  4. Data Assimilation for Advancing Film Cooling Flow Analysis

    50　(3)　163-169　2022/05

  5. An Attempt to Construct a Digital Twin of Wind Tunnel Experiments by Data Assimilation

    大林茂, 野本京佑, 焼野藍子, 野々村拓

    飛行機シンポジウム講演集(CD-ROM)　60th　2022

  6. 複雑な管形状による多数の固体粒子を含む非ニュートン流体の数値流体解析

    川俣柊介, 川本裕樹, 奈良祥太朗, 野原徹雄, 高橋俊, 大林茂

    日本バイオレオロジー学会誌(Web)　36　(2)　2022

    ISSN： 2186-5663

  7. The analysis of sonic boom propagation along actual flight route based on past 10 years of meteorological data

    井浦玲伊, 鵜飼孝博, YAMASHITA Hiroshi, KERN Bastian, 三坂孝志, 大林茂

    流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム講演集(CD-ROM)　54th-40th　2022

  8. 機械工学とインフォマティクス（設計情報学，代替モデリング，データ同化からの概観） Invited

    大林茂, 千葉一永, 下山幸治, 三坂孝志

    設計工学　56　(11)　539-545　2021/11

    Publisher: 公益社団法人 日本設計工学会誌

  9. データ同化技術の工学設計への応用その２

    三坂孝志, 大林茂

    機械の研究　73　(6)　413-421　2021/06/01

  10. データ同化技術の工学設計への応用その１

    三坂孝志, 大林茂

    機械の研究　73　(5)　329-333　2021/05/01

  11. Multiphase Flow Simulation of Non-Newtonian Fluids including Many Solid Particles through Corrugated Tube

    KAWAMATA Shuusuke, KAWAMOTO Yuki, NARA Shotaro, NOHARA Tetsuo, TAKAHASHI Shun, OBAYASHI Shigeru

    Proceedings. International Conference on Flow Dynamics (CD-ROM)　18th (Web)　2021

  12. Experimental and Computational Study on Unsteady Aerodynamic Characteristics of Rotating and Moving Wing Under Low Reynolds Number Region

    佐々木大輔, 下山幸治, 赤坂剛史, 岡本正人, 大林茂, 高橋俊

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書(CD-ROM)　2020　2021

  13. Experimental and Computational Study on Unsteady Aerodynamic Characteristics at Very Low Reynolds Number Flows

    佐々木大輔, 下山幸治, 赤坂剛史, 岡本正人, 大林茂, 高橋俊

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書(CD-ROM)　2021　2021

  14. Atmospheric Turbulence Visualization for Aviation Safety Using 3D Immersive VR System

    菊地亮太, 岩渕秀, 吉村僚一, 焼野藍子, 大林茂

    可視化情報学会誌　41　(162)　2021

    ISSN： 0916-4731

  15. Effect of unsteady drag reduction on moving two spheres by shock wave loading

    高橋俊, 永田貴之, 水野裕介, 野々村拓, 大林茂

    数値流体力学シンポジウム講演論文集(CD-ROM)　35th　2021

    ISSN： 2433-2674

  16. Design and Development of Engineering Products by Using Multiphase Flow Simulation

    高橋俊, 大林茂, 永田貴之, 水野祐介, 川本裕樹

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書　2019　2021

  17. Analysis of sonic boom propagation by the real atmosphere based on meteorological data

    井浦玲伊, 鵜飼孝博, 山本敦史, YAMASHITA Hiroshi, KERN Bastian, 三坂孝志, 大林茂

    流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム講演集(CD-ROM)　53rd-39th　2021

  18. Flow Simulation of Non-Newtonian Fluid through a Tube of Complicated Geometry

    川俣柊介, 川本裕樹, 奈良祥太朗, 野原徹雄, 高橋俊, 大林茂

    日本機械学会計算力学講演会論文集(CD-ROM)　34th　2021

    ISSN： 2424-2799

  19. Experimental and Computational Study on Unsteady Aerodynamic Characteristics of Micro Aerial Vehicles

    佐々木大輔, 下山幸治, 赤坂剛史, 岡本正人, 大林茂, 高橋俊

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書　2019 (CD-ROM)　2021

  20. 注目研究 in CFD33 羽田空港の格納庫後流中を飛行する着陸機の安全性の研究 Invited

    Shu Iwabuchi, Aiko Yakeno, Shigeru Obayashi, Ryoichi Yoshimura, Ryota Kikuchi

    ながれ　2020/04

  21. 2014年12月16日に発生した晴天乱気流事例のWRF-LESによる解析

    吉村僚一, 鈴木健斗, 伊藤純至, 焼野藍子, 大林茂, 菊地亮太

    日本気象学会東北支部気象研究会・仙台管区気象台東北地方調査研究会合同発表会予稿集(Web)　2020　2020

  22. Numerical Prediction of Flow Characteristics around Moving Objects in Multiphase Flow

    高橋俊, 大林茂, 水野祐介, 川本裕樹

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書　2018　2020

  23. Experimental and Numerical Study on Improvement of Flight Performance of a Multicopter

    佐々木大輔, 下山幸治, 大林茂, 岡本正人, 赤坂剛史, 高橋俊, 三坂孝志

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書　2018　2020

  24. Real-Time Prediction of Wind and Atmospheric Turbulence Using Aircraft Flight Data

    Ryota Kikuchi, Takashi Misaka, Shigeru Obayashi

    Mechanisms and Machine Science　75　475-487　2020/01/01

    DOI： 10.1007/978-3-030-27053-7_42 　

    ISSN： 2211-0984

    eISSN： 2211-0992

  25. Prediction of Rubber Friction on Wet and Dry Rough Surfaces Using Flow Structure Coupling Simulation

    Takayoshi Kubota, Yusuke Mizuno, Shun Takahashi, Ryota Asa, Reina Sagara, Yuji Kodama, Shigeru Obayashi

    Mechanisms and Machine Science　75　449-463　2020/01/01

    DOI： 10.1007/978-3-030-27053-7_40 　

    ISSN： 2211-0984

  26. Application of observability Gramian to targeted observation in WRF data assimilation

    Ryoichi Yoshimura, Aiko Yakeno, Takashi Misaka, Shigeru Obayashi

    Tellus, Series A: Dynamic Meteorology and Oceanography　72　(1)　1-11　2020/01/01

    Publisher: Informa UK Limited

    DOI： 10.1080/16000870.2019.1697602 　

    ISSN： 0280-6495

    eISSN： 1600-0870

  27. 大規模システムを見える化するデータ同化 Invited

    加藤博司, 三坂孝志, 大林茂

    ターボ機械　47　(9)　41-49　2019/09

  28. データ同化支援工学(DAE)のこれまでとこれから Invited

    三坂孝志, 加藤博司, 大林茂

    日本機械学会誌　122　(1210)　8-12　2019/09

  29. Optimization of passive grooved micromixers based on genetic algorithm and graph theory

    Mitsuo Yoshimura, Koji Shimoyama, Takashi Misaka, Shigeru Obayashi

    Microfluidics and Nanofluidics　23　(142)　1-21　2019/03/01

    DOI： 10.1007/s10404-019-2201-6 　

    ISSN： 1613-4982

  30. 航空機搭載型ライダ観測を用いたデータ同化による晴天乱気流の数値シミュレーション

    吉村僚一, 焼野藍子, 三坂孝志, 菊地亮太, 岩渕秀, 大林茂

    数値流体力学シンポジウム講演論文集(CD-ROM)　33rd　2019

    ISSN： 2433-2674

  31. 実験的・数値的解析によるマルチコプタの飛行性能向上に関する研究

    佐々木大輔, 下山幸治, 大林茂, 永谷圭司, 岡本正人, 赤坂剛史, 高橋俊, 三坂孝志

    東北大学流体科学研究所共同利用・共同研究拠点流体科学国際研究教育拠点活動報告書　2017　2019

  32. Topology Optimization of Flow Channels with Heat Transfer Using a Genetic Algorithm Assisted by the Kriging Model

    Mitsuo Yoshimura, Takashi Misaka, Koji Shimoyama, Shigeru Obayashi

    Computational Methods in Applied Sciences　48　537-552　2019/01/01

    Publisher: Springer International Publishing

    DOI： 10.1007/978-3-319-89988-6_32 　

    ISSN： 1871-3033

  33. Multipoint design optimization of vortex generators on transonic swept wings

    Nobuo Namura, Koji Shimoyama, Shigeru Obayashi, Yasushi Ito, Shunsuke Koike, Kazuyuki Nakakita

    Journal of Aircraft　56　(4)　1291-1302　2019/01/01

    DOI： 10.2514/1.C035148 　

    ISSN： 0021-8669

    eISSN： 1533-3868

  34. Direct numerical simulation of gas-particle flows with particle-wall collisions using the immersed boundary method

    Yusuke Mizuno, Shun Takahashi, Kota Fukuda, Shigeru Obayashi

    Applied Sciences (Switzerland)　8　2018/11/26

    DOI： 10.3390/app8122388 　

  35. Using ensemble Kalman filter to determine parameters for computational crowd dynamics simulations

    Fumiya Togashi, Takashi Misaka, Rainald Löhner, Shigeru Obayashi

    Engineering Computations (Swansea, Wales)　35　(7)　2612-2628　2018/10/01

    DOI： 10.1108/EC-03-2018-0115 　

    ISSN： 0264-4401

  36. Nowcasting algorithm for wind fields using ensemble forecasting and aircraft flight data

    Ryota Kikuchi, Takashi Misaka, Shigeru Obayashi, Hamaki Inokuchi, Hiroshi Oikawa, Akeo Misumi

    Meteorological Applications　25　(3)　365-375　2018/07/01

    DOI： 10.1002/met.1704 　

    ISSN： 1350-4827

    eISSN： 1469-8080

  37. Zonal Reduced-Order Modelling Toward Prediction of Transitional Flow Fields

    T. Misaka, S. Obayashi

    Journal of Physics: Conference Series　1036　2018/06/27

    DOI： 10.1088/1742-6596/1036/1/012012 　

    ISSN： 1742-6588

  38. 流体の影響を考慮したゴムと路面間の摩擦の数値解析

    久保田祟由, 水野裕介, 麻亮太, 相良玲那, 高橋俊, 児玉勇司, 大林茂

    数値流体力学シンポジウム講演論文集(CD-ROM)　32nd　2018

    ISSN： 2433-2674

  39. Trajectory generation for avoidance of atmospheric turbulence by using real-time data assimilation

    菊地亮太, 三坂孝志, 大林茂

    流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム講演集(CD-ROM)　50th-36th　ROMBUNNO.1C10　2018

  40. Building-Cube Methodを用いた翼胴形態のRANS解析

    牧野真弥, 三坂孝志, 大林茂, 佐々木大輔

    東北大学サイバーサイエンスセンター SENAC　51　(2)　11-12　2018

  41. 埋め込み境界法を用いた圧縮性・非圧縮性固気混相流解析の並列性能比較

    水野裕介, 高橋俊, 野々村拓, 永田貴之, 福田紘大, 大林茂

    数値流体力学シンポジウム講演論文集(CD-ROM)　32nd　ROMBUNNO.C12‐3　2018

    ISSN： 2433-2674

  42. Streamline Selection for Comparative Visualization of 3D Fluid Simulation Results : Extension to Virtual Reality Space

    41　(12)　277-280　2017/03

    Publisher: 映像情報メディア学会

    ISSN： 1342-6893

  43. 小型航空機の空力性能向上に関する研究

    佐々木大輔, 下山幸治, 岡本正人, 永谷圭司, 赤坂剛史, 小松一彦, 三坂孝志, 大塚光, 大林茂

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書　2015　2017

  44. Real-time estimation of airflow vector based on lidar observations

    菊地亮太, 三坂孝志, 大林茂, 井之口浜木, 秋山智浩

    飛行機シンポジウム講演集(CD-ROM)　55th　ROMBUNNO.3F14　2017

  45. 翼型の最適化を用いたロータブレードの効率化に関する研究

    加納健佑, 三坂孝志, 永井大樹, 仲野是克, 大林茂, 石川満, 茅沼秀高

    流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム講演集(CD-ROM)　49th-35th　ROMBUNNO.1D02　2017

  46. スパース構造学習による二つの非定常流体解析結果データの変化点検出 Peer-reviewed

    磯島宣之, 下山幸治, 大林茂

    第48回流体力学講演会/第34回航空宇宙数値シミュレーション技術シンポジウム論文集，JAXA–SP–16–007　151-156　2016/12

  47. 計測データに基づく格子細分化手法

    三坂孝志, 鵜飼孝博, 小西康郁, 大林茂

    JAXA-SP Special Publication　JAXA-SP-16-007　157-160　2016/12

  48. 羽田空港における格納庫後流に発生する乱気流の非定常流体解析

    山口晃毅, 菊地亮太, 三坂孝志, 大林茂, 又吉直樹, 三角暁雄, 黒須政信

    日本気象学会大会講演予稿集　(110)　142　2016/09/30

  49. グランドアンサンブル予報を用いたリアルタイムデータ同化

    菊地亮太, 三坂孝志, 大林茂, 井之口浜木, 及川博史, 三角暁雄

    日本気象学会大会講演予稿集　(110)　187　2016/09/30

  50. 後方乱気流のダイナミクス ～発生から崩壊まで～ Invited

    三坂孝志, 大林茂, ホルツァプフェル フランク

    信学技報　116　(199)　39-44　2016/08

  51. Comparative Visualization in CFD results of Delta Wing with Different Case Angle of Attack

    47　4p　2016/04/14

    Publisher: 日本航空宇宙学会

  52. Drag Measurement of a Sphere Model in Supersonic Free Flight Using the Ballistic Range

    川上 遼兼, 渡邊 正人, 中島 辰馬, 菊地 亮太, 大谷 清伸, 大林 茂

    年会講演会講演集　47　6p　2016/04/14

    Publisher: 日本航空宇宙学会

  53. 「設計に活かすデータ同化研究会」が目指す世界，日本機会学会 計算力学部門ニュースレター

    大林茂, 加藤博司, 三坂孝志

    日本機会学会 計算力学部門ニュースレター　55　10-11　2016/03

  54. 直交格子法による翼列流れの数値解析に向けた基礎研究

    小池雅輝, 小川奏一郎, 佐々木大輔, 三坂孝志, 福島裕馬, 大林茂

    日本機械学会北陸信越支部総会・講演会講演論文集(CD-ROM)　53rd　2016

    ISSN： 2424-2772

  55. Building Cube Methodに基づく解適合格子細分化と動的負荷分散

    三坂孝志, 佐々木大輔, 大林茂

    東北大学サイバーサイエンスセンター SENAC　49　(3)　1-8　2016

  56. B-24 Effect of the Air Permeability of Ski Jumping Suit Fabric on Flight Distance

    TEKURAMORI Shigekazu, HASEGAWA Hiroaki, SEO Kazuya, MURAKAMI Masahide, OBAYASHI Shigeru

    Symposium on sports and human dynamics　2015　"B-24-1"-"B-24-5"　2015/10/30

    Publisher: The Japan Society of Mechanical Engineers

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    Ski jumping is a sport which competes the flight distance and the flight form, and jumpers attempt to fly as far as possible. Ski jumping can be quantitatively treated from the aerodynamics point of view. The features of the ski jumping suit have an influence on the aerodynamic characteristics. In the regulations for ski jumping competition, the outstretched fabric must show a medium air permeability of a minimum of 40 liters per m^2/sec with 10 mm Aq differential pressure. However, the effect of the air permeability of ski jumping suits on the flight distance has not been completely clarified yet. The purpose of this study is to investigate three types of fabric with different air permeability from aerodynamic point of view, and the effect of air permeability of jumpsuit fabrics on the flight distance is examined. The wind tunnel experiments were carried out using the fabric clothed elliptic cylinder. The flight distance for each fabric was calculated with the aerodynamic force data assuming that the elliptic cylinder files.

  57. 254 Development of Flow Analysis Technology with Data Assimilation for Air Conditioner

    Yamakawa Hironobu, Nonaka Norihiko, Sato Koma, Misaka Takashi, Shimoyama Koji, Obayashi Shigeru

    The Computational Mechanics Conference　2015　(28)　"254-1"-"254-2"　2015/10/10

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  58. 307 ptimization of Measurement Position based on Data Assimilation

    Misaka Takashi, Ukai Takahiro, Konishi Yasufumi, Obayashi Shigeru

    The Computational Mechanics Conference　2015　(28)　"307-1"-"307-2"　2015/10/10

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  59. 東北大学流体科学研究所低乱風洞実験施設(<特集>空力実験設備:現状と新展開 第2回) Peer-reviewed

    大林 茂, 小西 康郁, 澤田 秀夫, 太田 福雄, 奥泉 寛之

    日本航空宇宙学会誌　63　(5)　155-161　2015/05

  60. Capability of Dynamic Wind Tunnel Testing by Magnetic Suspension and Balance System : Measurement Accuracy of Dynamic Stability Derivatives

    46　8p　2015/04/16

    Publisher: 日本航空宇宙学会

  61. Multipoint Design of Vortex Generators for a Transonic Infinite-Wing with a Sweepback Angle

    46　10p　2015/04/16

    Publisher: 日本航空宇宙学会

  62. 小型航空機の空力性能向上に関する研究

    佐々木大輔, 下山幸治, 岡本正人, 赤坂剛史, 大林茂, 小松一彦

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書　2014　2015

  63. 旅客機データを使用したリアルタイム乱気流予測

    菊地亮太, 三坂孝志, 大林茂, 井之口浜木, 及川博史

    流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム講演集(CD-ROM)　47th-33rd　ROMBUNNO.1B11　2015

  64. 138 Real-time data assimilation of a flow around a square cylinder using time-series PIV

    Kikuchi Ryota, Uchida Tatsuro, Misaka Takashi, Obayashi Shigeru

    The Proceedings of The Computational Mechanics Conference　2015　(0)　_138-1_-_138-2_　2015

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  65. C312 フライトデータとリアルタイムデータ同化による乱気流予測(気象予報,一般口頭発表)

    菊地 亮太, 三坂 孝志, 大林 茂, 井之口 浜木, 及川 博史

    大会講演予講集　107　306-306　2015

    Publisher: 日本気象学会

  66. S0220301 Design analysis of optimized stent for intracranial aneurysm using Self-organizing maps

    ANZAI Hitomi, YOSHIDA Yuuki, SHIMOYAMA Koji, OBAYASHI Shigeru, OHTA Makoto

    The Proceedings of Mechanical Engineering Congress, Japan　2015　(0)　_S0220301--_S0220301-　2015

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecj.2015._S0220301- 　

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    As evaluation of hemodynamics in an aneurysm, a lot of parameters have been introduced. However, the relationship between stent geometry and each hemodynamic parameter is not clear enough. We applied Self-organizing Maps (SOM) to search the detailed relationship between stent strut and hemodynamic parameters. Two thousands of stent design candidates evaluated with five hemodynamic parameters and 25 stent geometry parameters were stored during the optimization process. By using SOM software, 2,000 design candidates were visualized into 30 2D-maps while preserving their own features in the original 30-dimensional design space. Each map was divided into 20 clusters to characterize stent design and flow reduction. By comparing each cluster, critical design for reduction effect of each hemodynamic parameter is suggested. Strut placement on the inflow area is important to reduce maximum shear rate. In addition to the inflow area, strut on the outflow area is required to reduce velocity, vorticity, and average shear rate.

  67. Drag parameter estimation of porous medium using data assimilation

    Misaka Takashi, Shimoyama Koji, Obayashi Shigeru, Yamakawa Hironobu

    The Computational Mechanics Conference　2014　(27)　213-214　2014/11/22

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  68. A Linked Visualization of Explanatory Variable and Objective Function Spaces for Multi-objective Optimization

    Kubota Maki, Itoh Takayuki, Obayashi Shigeru, Takeshima Yuriko

    The Computational Mechanics Conference　2014　(27)　230-231　2014/11/22

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  69. S0510404 Flow field Structure around a NACA0012 airfoil using Synthetic Jets

    ITGEL Uguumur, HASEGAWA Hiroaki, OBAYASHI Shigeru

    Mechanical Engineering Congress, Japan　2014　"S0510404-1"-"S0510404-4"　2014/09/07

    Publisher: The Japan Society of Mechanical Engineers

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    In this study, experimental study was undertaken to investigate the flow field structure around a NACA0012 airfoil installed the synthetic jet actuator in a wind tunnel. Synthetic jet arrays on the upper surface of the airfoil were placed at 20% of the chord from the leading edge. Synthetic jets have the ability to inject momentum into an external flow without net mass flux. Synthetic jet actuators are low operating power and very compact devices, and have demonstrated their capability in modifying the subsonic flow characteristics for boundary layer flow control. A smoke flow visualization was used to reveal the behavior of the leading edge vortex for each phase of issuing the synthetic jet. It was confirmed that the maximum lift coefficient increases and the stall angle delays by operating the synthetic jets in contrast to the case under no control. The periodic excitation produced by the synthetic jets occurs in the separated shear layer, and the instability in the separated shear layer is promoted. Therefore, the large scale vortex is generated and the flow attaches to the upper surface of the airfoil.

  70. 航空機エンジン排気ジェットと後流渦の干渉解析

    三坂孝志, 佐々木大輔, 大林茂, 中橋和博

    東北大学サイバーサイエンスセンター SENAC　47　(3)　27-35　2014/07

  71. Low Turbulence Wind Tunnel Flight Measurement Integration Instrument with Magnetic Suspension and Balance System

    OBAYASHI Shigeru, SAWADA Hideo, KONISHI Yasufumi

    Journal of the Japan Society for Aeronautical and Space Sciences　62　(6)　214-221　2014/06

    Publisher: The Japan Society for Aeronautical and Space Sciences

    ISSN： 0021-4663

  72. Shock-turbulence interaction in high and low humidity field

    45　7p　2014/04/10

    Publisher: 日本航空宇宙学会

  73. 縮約モデルと粒子フィルタを用いたリアルタイムデータ同化計算—Real-Time Data Assimilation Using Particle Filter and Reduced Order Model

    菊地, 亮太, 三坂, 孝志, 大林, 茂, Kikuchi, Ryota, Misaka, Takashi, Obayashi, Shigeru

    宇宙航空研究開発機構特別資料: 第45回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2013論文集 = JAXA Special Publication　JAXA-SP-13-011　83-88　2014/03/31

    Publisher: 宇宙航空研究開発機構(JAXA)

    ISSN： 1349-113X

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    第45回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2013 (2013年7月4日-5日. タワーホール船堀), 東京 45th Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2013 (July 4-5, 2013. Tower Hall Funabori), Tokyo, Japan In this research, aiming at real-time data assimilation, a reduced order model (ROM) and a particle filter (PF) are applied to predict the Karman vortex around a circular cylinder. The ROM is an efficient tool to calculate a flow field in real-time because the ROM consumes extremely less computational time than the original numerical model. The PF is employed to estimate coefficients of the ROM by using observed velocity components in the wake of the circular cylinder. Comparing the result of the ROM and that of the numerical analysis by Building Cube Methods (BCM), the phase difference of the Karman vortex between the ROM and the observations was corrected. The proposed method could estimate the flow field accurately in real-time even though the observation contained artificial measurement errors. 形態: カラー図版あり Physical characteristics: Original contains color illustrations 資料番号: AA0062268015 レポート番号: JAXA-SP-13-011

  74. Low Reynolds Number Flow Analysis of Flat Plate

    KOJIMA Yuya, SASAKI Daisuke, AKASAKA Takeshi, OKAMOTO Masato, KOMATSU Kazuhiko, OBAYASHI Shigeru, SHIMOYAMA Koji

    Proceedings of the International Symposium on Advanced Fluid Information　14th　2014

    ISSN： 1344-2236

  75. 小型航空機の空力性能向上に関する研究

    佐々木大輔, 下山幸治, 岡本正人, 赤坂剛史, 大林茂, 小松一彦

    東北大学流体科学研究所共同利用・共同研究拠点流体科学研究拠点活動報告書　2013　2014

  76. EFD/CFD融合技術のための円柱周りのリアルタイム流れ場予測

    菊地亮太, 三坂孝志, 大林茂

    流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム講演集(CD-ROM)　46th-32nd　ROMBUNNO.2C02　2014

  77. Nonlinear Aerodynamic Analysis of Three-Dimensional Wing Using Data Assimilation

    Fang Chen, Misaka Takashi, Kikuchi Ryota, Obayashi Shigeru, Kato Hiroshi, Asai Keisuke, Ambo Takumi, Numata Daiju

    The Proceedings of The Computational Mechanics Conference　2014　(0)　211-212　2014

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  78. Application of Data Assimilation to Aerospace Engineering(<Special Feature>Big Data and Data Assimilation)

    Kato Hiroshi, Obayashi Shigeru, Hashimoto Atsushi, Yoshizawa Akira, Kuchiishi Shigeru, Watanabe Shigeya

    Journal of the Japan Society for Simulation Technology　32　(4)　313-318　2013/12/15

    Publisher: 日本シミュレーション学会

    ISSN： 0285-9947

  79. 227 Aerodynamic Stability of a Badminton Shuttlecock Just after Impact

    NAKAGAWA Kenichi, HASEGAWA Hiroaki, MURAKAMI Masahide, OBAYASHI Shigeru

    Symposium on sports and human dynamics　2013　"227-1"-"227-5"　2013/11/01

    Publisher: The Japan Society of Mechanical Engineers

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    A badminton shuttlecock generates significant aerodynamic drag and has a complex flight trajectory. The objectives of this study were to measure the aerodynamic properties of feather shuttlecocks under a wide range of wind speeds and to investigate the aerodynamic stability for the pitch movement (rotation about lateral axis). In particular, measurements of aerodynamic forces were performed at high Reynolds numbers. The lift and drag characteristics of shuttlecock have the same tendency with and without spin rotation. On the other hand, the pitching moment coefficient is affected by spin rotation. The pitching moment for a rotating shuttlecock is larger than that for a non-rotating shuttlecock. Furthermore, a shuttlecock is aerodynamically stable for the pitch movement just after impact. It was confirmed that the aerodynamic stability of a badminton shuttlecock is related to the gaps between the slots located at the leg portion and the feather of shuttlecock skirt.

  80. 235 The Measurement of the Negative Magnus Force on a Table Tennis Ball

    Konishi Yasufumi, Okuizumi Hiroyuki, Ohno Tomoyuki, Obayashi Shigeru

    Symposium on sports and human dynamics　2013　"235-1"-"235-8"　2013/11/01

    Publisher: The Japan Society of Mechanical Engineers

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    The negative Magnus force was observed on a sphere at the moderate Reynolds number and the moderate spin rate which is defined by the ratio of the circumferential velocity to the free stream velocity. This region matches the forehand smash in a table tennis game according to the result of Taneda's experiments. To confirm the possibility of the existence of this negative Magnus force on the table tennis game, the wind tunnel test was conducted. As the result, it was observed at Reynolds numbers higher than 5.35 × 10^4. And we also provide a simple approximation of the lift and drag force to simulate a motion under the condition affecting a negative Magnus force.

  81. 517 Aerodynamic measurement of rotating three-dimensional rectangular prism

    OKUIZUMI Hiroyuki, KONISHI Yasufumi, OHTA Fukuo, OBAYASHI Shigeru

    2013　(49)　161-162　2013/09/20

    Publisher: The Japan Society of Mechanical Engineers

  82. Estimation of Low-Level Turbulence Using Real-Time Data Assimilation

    菊地亮太, 三坂孝志, 竹島由里子, 大林茂

    可視化情報学会誌　33　(Suppl.2)　161‐162　2013/09/15

    ISSN： 0916-4731

  83. S054015 Airfoil Stall Suppression Using Active Boundary Layer Control System

    ITO Shuko, HASEGAWA Hiroaki, OBAYASHI Shigeru

    Mechanical Engineering Congress, Japan　2013　"S054015-1"-"S054015-3"　2013/09/08

    Publisher: The Japan Society of Mechanical Engineers

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    Flow separation is mostly an undesirable phenomenon and boundary layer control is an important technique for the separation problems on airfoils. A synthetic jet actuator is considered as a promising candidate for flow control applications because of its compact nature and ability to generate momentum without a need for fluidic plumbing . In the flow fields where the separation control is not needed, parasitic drag can be avoided with the jet flow turned-off. If the control device operates only when it is necessary and can adaptively suppress flow separation, the ideal flow corresponding to the flow under its design condition is always attained without any changes in design of airfoils. In this study, wind tunnel tests for an airfoil installed active boundary layer control system using the synthetic jet were performed. The experimental results indicate that the maximum lift coefficient increases 11%, and the stall angle is to rise by 4 deg in contrast to the case under no control. It was confirmed that our proposed system can suppress stall on the NACA0012 airfoil and the aerodynamic performance of the airfoil can be enhanced.

  84. High Aerodynamic Drag of a Badminton Shuttlecock

    HASEGAWA Hiroaki, WADA Kenji, MURAKAMI Masahide, OBAYASHI Shigeru, Hiroaki HASEGAWA, Kenji WADA, Masahide MURAKAMI, Shigeru OBAYASHI, Graduate School of Engineering & Resource Sciences Akita University, Department of Mechanical Engineering Akita University, University of Tsukuba, Institute of Fluid Science Tohoku University

    32　(2)　153-162　2013/04/25

    Publisher: 日本流体力学会

    ISSN： 0286-3154

  85. Ground Experiment of Supersonic Biplane Theory

    OBAYASHI Shigeru, YAMASHITA Hiroshi, OHTANI Kiyonobu, KIKUCHI Takamasa, UKAI Takahiro

    Journal of the Japan Society for Aeronautical and Space Sciences　61　(4)　123-128　2013/04/05

    Publisher: The Japan Society for Aeronautical and Space Sciences

    ISSN： 0021-4663

  86. データ同化法による後方乱気流の計測融合シミュレーション Mearurement-Integrated Simulation of Wake Turbulence Using Data Assimilation Method

    大林茂, 三坂孝志

    日本機械学会誌　116　(1131)　107-109　2013/02/05

    Publisher: 丸善出版㈱

    ISSN： 0021-4728

  87. A Linked Visualization of Explanatory Variable and Objective Function Spaces for Multi-objective Optimization

    33　(1)　311-314　2013

    Publisher: 可視化情報学会

    ISSN： 0916-4731

  88. Unsteady Fluid Dynamic Forces measurements on Airfoils with Heaving and Feathering Oscillations at Very Low Reynolds Number

    KURODA Tatsuya, OKAMOTO Masato, SASAKI Daisuke, AKASAKA Takeshi, SHIMOYAMA Koji, OBAYASHI Shigeru

    Proceedings of the International Symposium on Advanced Fluid Information　13th　2013

    ISSN： 1344-2236

  89. Cartesian-based CFD Solver for Low-Reynolds Number Airfoils

    SASAKI Daisuke, KOJIMA Yuya, KURODA Tatsuya, AKASAKA Takeshi, OKAMOTO Masato, SHIMOYAMA Koji, OBAYASHI Shigeru

    Proceedings. International Conference on Flow Dynamics (CD-ROM)　10th　2013

  90. 縮約モデルと粒子フィルタを用いたリアルタイムデータ同化計算

    菊地亮太, 三坂孝志, 大林茂

    流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム講演集(CD-ROM)　45th-2013　ROMBUNNO.2A09　2013

  91. 109 Effect of Spin Rotation on Aerodynamic Characteristics of a Badminton Shuttlecock

    KIKUCHI Noritaka, HASEGAWA Hiroaki, MURAKAMI Masahide, OBAYASHI Shigeru

    Symposium on sports and human dynamics　2012　70-73　2012/11/14

    Publisher: The Japan Society of Mechanical Engineers

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    Badminton is a high-drag game, and thus, the sport has been a subject of research from the point of view of aerodynamics. A badminton shuttlecock generates significant aerodynamic drag and has a complex flight trajectory. The primary objectives of this study were to measure the aerodynamic properties of feather shuttlecocks under a wide range of wind speeds and pitch angles. In particular, measurements of aerodynamic forces were performed at high Reynolds numbers, and the effect of spin rotation of the shuttlecock on aerodynamic properties was also investigated. The lift and drag characteristics of shuttlecock have the same tendency with and without spin rotation. On the other hand, the pitching moment coefficient is affected by spin rotation. The pitching moment for a rotating shuttlecock is larger than that for a non-rotating shuttlecock, and that the pitching moment increases with an increase in the angle of attack. A shuttlecock is aerodynamically stable, and this aerodynamic stability is promoted by spin rotation.

  92. Adaptive Simulation of Turbulence Flow by using Data Assimilation

    加藤 博司, 大林 茂, 橋本 敦, 吉澤徴, 上野玄太, 樋口知之

    Journal of Japan Society of Fluid Mechanics　31　(2)　165-173　2012/04/25

    Publisher: 日本流体力学学会

    ISSN： 0286-3154

  93. 132 Underwater Expansion Wave and Bubble Generation Phenomena Near the Water Surface

    OHTANI Kiyonobu, OGAWA Toshihiro, Obayashi Shigeru

    2012　(47)　70-71　2012/03/13

    Publisher: The Japan Society of Mechanical Engineers

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    This paper reports a preliminary experimental result of the expansion wave and cavitation bubble generation near the water surface. Underwater spherical shock wave generated by detonating of micro explosive of a 10 mg silver azide (AgN_3)pellets propagated and reflected from the water surface. The reflected wave is an expansion wave. The process of expansion wave and cavitation bubble generation near the water surface were observed by shadowgraph method and recorded by a high-speed camera. The pressure distribution near the water surface was measured by a PVDF needle hydrophone.

  94. A9 The Characteristics of Fluid Forces and Flow Behavior for a Badminton Shuttlecock at High Reynolds Numbers

    WADA Kenji, HASEGAWA Hiroaki, KITTA Seigo, MURAKAMI Masahide, OBAYASHI Shigeru

    Symposium on sports and human dynamics　2011　57-61　2011/10/30

    Publisher: The Japan Society of Mechanical Engineers

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    A shuttlecock which has an open conical shape is a high-drag projectile used in the sport of badminton, and the shape of the shuttlecock makes it aerodynamically stable. In the present study, measurements of aerodynamic forces and flow visualization experiments are carried out in order to investigate the relationship between fluid forces and vortex behavior around a shuttlecock at high Reynolds numbers. And the effect of shuttlecock deformation on aerodynamic properties was also investigated because it is presumed that aerodynamic forces are affected by the deformation of shuttlecock skirt. The drag coefficient for the shuttlecock with no gap is significantly smaller than that for the ordinary shuttlecock (with gap). For the ordinary shuttlecock, the air flows through the gap in the shuttlecock skirt, and this flow is related to high aerodynamic drag.

  95. 1805 Data Assimilation Experiment of FaSTAR by using Ensemble Kalman Filter

    Kato Hiroshi, Obayashi Shigeru, Hashimoto Atsushi

    The Computational Mechanics Conference　2011　(24)　542-544　2011/10/08

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

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    本研究では、JAXAで開発が進められている高速流体ソルバ「FaSTAR」と逐次型同化手法「アンサンブルカルマンフィルタ」を用い、データ同化システムを構築した。構築したデータ同化システムを用い、&quot;双子実験&quot;を実施し、翼表面圧力値の同化可能性を検証した。構築したデータ同化システムを用いて、アンサンブルカルマンフィルタの特徴を確認し、また、データ同化の有効性を確認した。

  96. F052003 Fluid Informatics and Design

    OBAYASHI Shigeru

    Mechanical Engineering Congress, Japan　2011　"F052003-1"-"F052003-4"　2011/09/11

    Publisher: The Japan Society of Mechanical Engineers

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    One of the facets of Fluid Informatics has been constructed from the application of Soft Computing to design problems in fluid engineering. Self-Organizing Maps (SOMs) have been used to visualize the objective function space of the optimization problem in fluid engineering design obtained by Evolutionary Computation. The resulting SOM generates clusters of designs, which indicate tradeoffs and sweet spot in the design space. These processes can be considered as visual data mining of the engineering design to obtain design knowledge. Data mining example will be given for supersonic wing design.

  97. Visualization of Aircraft Design Space

    OBAYASHI Shigeru

    Journal of the Visualization Society of Japan　31　(121)　48-53　2011/04/01

    Publisher: 可視化情報学会

    ISSN： 0916-4731

  98. Sonic Boom Analysis Considering Multiple Atmospheric Uncertainties Using a Polynomial Chaos Method

    Daichi Ono, Atsushi Hashimoto, Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    Proceedings of Eighth International Conference on Flow Dynamics　2011

  99. 0702 Study of Low Speed Aerodynamic Characteristics of Basic Configuration of Supersonic Biplane Airfoil

    ISOBE Yuichi, YAMASHITA Hiroshi, OBAYASHI Shigeru, MATSUNO Takashi, KAWAZOE Hiromitsu

    Fluids engineering conference ...　2010　209-210　2010/10/29

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-2882

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    The critical problems preventing a supersonic commercial transport going into service are the creation of sonic boom and poor fuel efficiency caused by large drag, both derived from shock wave. The "supersonic biplane theory" has been proposed to alleviate these problems. Previous research showed supersonic biplane wing can cancel out and reduce shock wave causing these problems. On the other hand, considering takeoff and landing, the low speed characteristics of the supersonic biplane is to be investigated. In this research, two-dimensional test was conducted to measure the lift and profile drag. The values were derived by integrating the static pressure measurements over the wing. Then the obtained results were compared with the computational results.

  100. 0703 Signal Processing using Gaussian Distribution for Airborne Doppler Lidar

    SHIBASAKI Tetsuya, OBAYASHI Shigeru

    Fluids engineering conference ...　2010　211-212　2010/10/29

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-2882

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    This research focused on the "width of wind velocity", which is the standard deviation of wind velocity, as a new index for detecting Clear Air Turbulence (CAT) form the lidar measurement data with noise. In order to comfirm the detectability of the CAT by the width of wind velocity, it was compared with the time history of perpendicular acceleration that shows the shake of airplane. And, to expand the measurement range of the width of wind velocity, spectrum fitting method was applied to the measurement data and its effectiveness was investigated. As a result, width of wind velocity was confirmed as a valid index for detecting CAT and the effectiveness of spectrum fitting method to expand measurement range was proven.

  101. W202 Simulation of Wake Turbulence at Sendai Airport

    Obayashi Shigeru

    Fluids engineering conference ...　2010　609-612　2010/10/29

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-2882

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    Numerical simulation of aircraft's wake turbulence was carried out by integrating LIDAR measurements at Sendai Airport. Four-dimensional variational (4D-VAR) method was applied to integrate LIDAR measurements into three-dimensional large eddy simulation (LES). The behavior of the simulated wake turbulence was interactively analyzed through an immersive virtual environment. The CFD simulation of wake turbulence was also performed by employing numerical weather model as the initial and boundary conditions. By placing virtual wake vortices in the initial condition, the rapid decay process of wake turbulence was observed under the horizontal roll convection currents in sea breeze.

  102. 計算力学

    大林茂

    日本機械学会誌　9-9　2010/08/05

    Publisher: 社団法人日本機械学会

  103. 世界記録への挑戦：長距離人力飛行機研究調査について

    大林茂

    日本航空宇宙学会誌　58　(677)　1-5　2010/06/05

  104. (10) Kriging-Model-Based Multi-Objective Robust Optimization and Trade-Off Rule Mining of a Centrifugal Fan with Dimensional Uncertainty

    Journal of the Japan Society of Mechanical Engineers　113　(1098)　318-318　2010/05/05

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 0021-4728

  105. Exploration of Unsteady Blood Flow Information in an Aneurysm Aorta

    15　(1)　333-336　2010/05

    Publisher: 日本計算工学会

    ISSN： 1342-145X

  106. 多目的ロバスト設計のための方法論確立と実問題応用

    下山幸治, 鄭信圭, 大林茂

    日本信頼性学会誌「信頼性」　32　(2)　105-112　2010

    DOI： 10.11348/reajshinrai.32.2_105 　

  107. Investigation of the bed and rear flap variation for a low-drag pickup truck using design of experiments

    Jongsoo Ha, Shinkyu Jeong, Shigeru Obayashi

    SAE Technical Papers　2010

    DOI： 10.4271/2010-01-0122 　

  108. Performance Map Construction for a Centrifugal Diffuser with Data Mining Techniques

    Koji Shimoyama, Kazuyuki Sugimura, Shinkyu Jeong, Shigeru Obayashi

    Journal of Computational Science and Technology　4　(1)　36-50　2010

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jcst.4.36 　

    ISSN： 1881-6894

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    Performance maps, which represent relations between performance and geometry parameters, are essential for engineers to make a first decision on preliminary specification of a product to be designed. However, actual design often needs to consider various performance and geometry parameters simultaneously. Therefore, the resulting performance maps must be constructed in a high-dimensional form. Based on these requirements, this paper proposes and demonstrates performance map construction with the aid of data mining techniques. Data mining can reveal characteristic patterns in high-dimensional data with performance and geometry parameters. Therefore, the data mining results make it easy to interpret complex features of performance vs. geometry relations, and help engineers to discover new knowledge for engineering design through interpretation. The present demonstration of a centrifugal diffuser demonstrated that the data mining techniques are suitable and applicable to high-dimensional performance map construction, together with actual acquisition of new knowledge for diffuser design that was unknown from conventional quasi-one-dimensional nozzle theory.

  109. Influence of Vehicle Rear Shape on Aerodynamic Performance and Wake Structure

    Chen-Guang Lai, Shigeru Obayashi, Yasuaki Kohama, Shinkyu Jeong

    Proceedings of 7th International Conference on Flow Dynamics　2010

  110. Physics Mining for Unsteady Flow Field in a Hard Disk Drive

    Seiichiro Morizawa, Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    Proceedings of 7th International Conference on Flow Dynamics　2010

  111. Rotor Blade Shape Design Using MDO Platform-MEDOC

    Sanghyun Chae, Kwanjung Yee, Shigeru Obayashi, Shinkyu Jeong

    Proceedings of 7th International Conference on Flow Dynamics　2010

  112. 航空宇宙産業と計算工学

    大林 茂

    計算工学　14　(3)　1-1　2009/07/31

  113. 航空宇宙産業と計算工学

    大林茂

    計算工学　14　(3)　1-1　2009/07/31

  114. 多目的設計探査による設計空間の可視化と知識発見

    下山幸治, 杉村和之, 鄭信圭, 大林茂

    知能と情報（日本知能情報ファジィ学会誌）　21　(3)　293-303　2009/06

    DOI： 10.3156/jsoft.21.3_293 　

  115. 20年前の計算から－圧縮性でも陰的LES?

    大林茂

    Journal of Japan Society of Fluid Mechanics　28　(2)　131-132　2009/04/25

    Publisher: 日本流体力学学会

    ISSN： 0286-3154

  116. 超音速複葉翼の始動過程に対する3次元性の影響

    大山創史, 藤園崇, 永井大樹, 浅井圭介, 大林茂

    衝撃波シンポジウム講演論文集　2008　269-272　2009/03/17

  117. 211 Realization of Measurement-Integrated Simulation Dataset for Wake Turbulence : (2) An Attempt to Haptize Unsteady Flow Fields

    Maki Yuichi, Takeshima Yuriko, Fujishiro Issei, Takahashi Shigeo, Misaka Takashi, Obayashi Shigeru

    2009　(44)　214-215　2009/03/13

    Publisher: The Japan Society of Mechanical Engineers

  118. 210 Realization of Measurement-Integrated Simulation Dataset for Wake Turbulence : (1) Designing Temporal Transfer Functions Based on Differential Topology Analysis

    Hoshi Yosuke, Takeshima Yuriko, Fujishiro Issei, Takahashi Shigeo, Misaka Takashi, Obayashi Shigeru

    2009　(44)　212-213　2009/03/13

    Publisher: The Japan Society of Mechanical Engineers

  119. 実験/計算融合によるソニックブーム推定方法の高精度化

    大林茂, 浅井圭介, 永井大樹, 小川俊広, 倉谷尚志

    宇宙航空研究開発機構契約報告 JAXA-CR-　(08-002)　7-17　2009/02/27

    ISSN： 1349-1148

  120. 蒸気タービン静翼形状設計最適化

    吉清水宗, 下山幸治, JEONG Shinkyu, 大林茂, 横野泰之

    日本航空宇宙学会北部支部講演会ならびに再使用型宇宙推進系シンポジウム講演論文集　2009-10th　2009

  121. 超音速複葉翼の始動過程に対する3次元性の影響

    藤園崇, 大山創史, 永井大樹, 大林茂, 浅井圭介

    日本航空宇宙学会北部支部講演会ならびに再使用型宇宙推進系シンポジウム講演論文集　2009-10th　52-57　2009

  122. Development and investigation of efficient GA/PSO-hybrid algorithm applicable to real-world design optimization

    Shinkyu Jeong, Shoichi Hasegawa, Koji Shimoyama, Shigeru Obayashi

    2009 IEEE Congress on Evolutionary Computation, CEC 2009　777　(784)　777-784　2009

    DOI： 10.1109/CEC.2009.4983024 　

  123. Kriging-model-based Multi-objective Robust Optimization and Trade-off-rule Mining Using Association Rule with Aspiration Vector

    Kazuyuki Sugimura, Shinkyu Jeong, Shigeru Obayashi, Takeshi Kimura

    2009 IEEE CONGRESS ON EVOLUTIONARY COMPUTATION, VOLS 1-5　(784)　522-+　2009

    DOI： 10.1109/CEC.2009.4982990 　

  124. Flow Characteristics of a Pickup Truck according to the Bed Geometry

    Jongsoo Ha, Shinkyu Jeong, Yasuaki Kohama, Shigeru Obayashi

    Proceedings of The 4th SNU－TU Joint Workshop on Next Generation Aero Vehicle　2009

  125. Investigation of Aerodynamic Performance due to Automotive Engine-cooling Exit Flow

    Chen-Guang Lai, Yasuaki Kohama, Shigeru Obayashi, Shinkyu Jeong

    Proceedings of The 9th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration　2009

  126. Meteorological Influence on Sonic Boom

    Hiroshi Yamashita, Shinkyu Jeong, Shigeru Obayashi

    Proceedings of The 9th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration　2009

  127. 105 A Study of Airfoil Representation Methods for Improvement in Optimal Solution Searching Capability

    YOSHIMIZU Shu, SHIMOYAMA Koji, JEONG Shinkyu, OBAYASHI Shigeru, YOKONO Yasuyuki

    2008　(8)　21-24　2008/11/26

    Publisher: The Japan Society of Mechanical Engineers

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    Our previous design optimization of a steam turbine stator blade had lack in the capability of searching optimal solutions, due to low accuracy of response surfaces for the objective functions. This paper starts from a further discussion on the previous optimization results. It finds out that the airfoil representation method used in the previous optimization cannot assure the uniqueness to critical parameters, which are sensitive to the objective functions. Then, this study discusses and modifies a choice of airfoil representation methods. The present optimization using the modified method for airfoil representation realizes successful improvement in the response surface accuracy, and can obtain better solutions than the previous optimization.

  128. Supersonic Biplane Theory to Mitigate Sonic Boom

    OBAYASHI Shigeru, KURATANI Naoshi

    Journal of the Gas Turbine Society of Japan　36　(5)　335-339　2008/09/20

    Publisher: Gas Turbine Society of Japan

    ISSN： 0387-4168

  129. 進化計算による多目的最適化と工学設計

    大林茂

    計測と制御　47　(6)　480-486　2008/06/10

    Publisher: 社団法人計測自動制御学会

    ISSN： 0453-4662

  130. VISUAL ANALYSIS OF WAKE TURBULENCE AT SENDAI AIRPORT USING IMMERSIVE VIRTUAL ENVIRONMENT

    OBAYASHI Shigeru, MISAKA Takashi, OGASAWARA Takeshi, FUJISHIRO Issei, TAKESHIMA Yuriko

    13　(2)　953-954　2008/05/19

    ISSN： 1342-145X

  131. Design space exploration of supersonic formation flying focusing on drag minimization

    Yuichiro Goto, Shinkyu Jeong, Shigeru Obayashi, Yasuaki Kohama

    JOURNAL OF AIRCRAFT　45　(2)　430-439　2008/03

    DOI： 10.2514/1.28766 　

    ISSN： 0021-8669

  132. Report of the thirty-nineth fluid dynamics conference and aerospace numerical simulation symposium 2007, and their awards

    Aeronautical and space sciences Japan　56　(648)　20-23　2008/01

    Publisher: 日本航空宇宙学会

    ISSN： 0021-4663

  133. Aeroelastic Analysis using Unstructured CFD Method for Realistic Aircraft Design

    T.Kumano, H.Morino, S. Jeong, S. Obayashi

    Proceeding for the 8th World Congress on computational Mechanics-5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008)　2008

  134. An Efficient Robust Optimization Framework for Real-Would Engineering Design

    K. Shimoyama, S. Jeong, S. Obayashi

    Proceeding for the 8th World Congress on computational Mechanics-5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008)　2008

  135. Low-Boom and Low-Drag Design Exploration for Twin Engine Supersonic Business Jet

    S. Jeong, K. Sato, T.Kumano, T.Kumano, S. Obayashi

    Proceeding for the 8th World Congress on computational Mechanics-5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008)　2008

  136. Multi-Objective Design Exploration (MODE)- Visualization of Design Space and Knowledge Mining (Keynote Lecture)

    Shigeru Obayashi, Shinkyu Jeong, Takayasu Kumano

    Proceeding for the 8th World Congress on computational Mechanics-5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008)　2008

  137. Multi-Objective Design Optimization for Stator Blade Configuration of Steam Turbine

    S. Yoshimizu, K. Shimoyama, S. Jeong, S. Obayashi, Y. Yokono

    Proceeding for the 8th World Congress on computational Mechanics-5th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2008)　2008

  138. MULTI-OBJECTIVE ROBUST DESIGN OPTIMIZATION AND KNOWLEDGE MINING OF A CENTRIFUGAL FAN THAT TAKES DIMENSIONAL UNCERTAINTY INTO ACCOUNT

    Kazuyuki Sugimura, Shinkyu Jeong, Shigeru Obayashi, Takeshi Kimura

    PROCEEDINGS OF THE ASME TURBO EXPO 2008, VOL 6, PT A　2659-2668　2008

    DOI： 10.1115/GT2008-51301 　

  139. Blade Shape Optimization for HSI Noise Reduction and Performance Improvement of Helicopter

    S.Chae, K.Yee, C.Yang, T.Aoyama, S. Jeong, S. Obayashi

    Proceedings of 34th European Rotorcraft Forum　2008

  140. 応答曲面近似・データマイニングを併用した多目的ロバスト設計最適化手法の開発・応用

    下山幸治, リムジンネ, 鄭信圭, 大林茂

    東北大学流体科学研究所報告　18　1-10　2007/12

  141. 1404 Multi-Objective Optimization of Airfoil Design for Steam Turbine Stator Blade

    YOSHIMIZU Shu, SHIMOYAMA Koji, JEONG Shinkyu, OBAYASHI Shigeru, YOKONO Yasuyuki

    2007　(17)　98-99　2007/10/30

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-0286

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    A new approach for multi-objective design optimization which combines CFD analysis and optimization techniques has been proposed and applied to the airfoil design for a steam turbine stator blade. In the present approach, genetic algorithm is used to search compromised solutions in the multi-objective problem. In addition, response surface approximation using the Kriging model is used together in order to reduce the computational time for objective function evaluation. As a result, the computational time required for the entire optimization process was kept within a realistic range. Moreover, the trade-off relations between multiple objective functions have been discovered, even though the accuracy of the response surface approximation was not yet in a satisfactory level. Finally, many design candidates that outperform the original baseline design have also been discovered.

  142. 1406 Profile Chart Visualization of Multi-Objectives Spaces

    Sakai Hiroyuki, Obayashi Shigeru

    104-106　2007

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-0286

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    Even though various visualization methods have been shown previously, 2D or 3D Scatter Plot is still consistently popular to see multi-objective spaces. However, these scatter plots cannot describe more than three objectives at once. This monograph proposes visualization methods to understand easier multi-objectives spaces using Profile Chart, which is usually known as Parallel Coordinate Plot. Additionally, it also shows Bubble Chart to describe feature of design spaces based on binned variables.

  143. Application of Kriging-Based Optimization Method to Lifting-Body Type Reentry Vehicle Design

    S. Jeong, K. Suzuki, S. Obayashi

    Proceedings of EUROGEN 2007　2007

  144. Development and Application of a New Robust Optimization Framework for Real-World Engineering Design

    K. Sato, T. Kumano, M. Yonezawa, H. Yamashita, S. Jeong, S. Obayashi

    Low-Boom and Low-Drag Optimization of the Twin Engine Version of Silent Supersonic Business Jet　2007

  145. Effects of Leading-edge Flaps on Low-Speed Aerodynamic Performance of Supersonic Biplane

    N.Kuratani, T.Ogawa, S.Ozaki, S.Obayashi, T.Matsuno, H.Kawazoe

    Proc. of 2007 JSASS-KSAS Joint Int. Symp. on Aerospace Engineering　280-283　2007

  146. 339 Construction of a Data Mining Method for Unsteady CFD Results

    Shibasaki Takashi, Obayashi Shigeru

    The Computational Mechanics Conference　2006　(19)　431-432　2006/11/02

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  147. 1303 Reproduction of clear air turbulence using flight data and its data mining(1)

    MISAKA Takashi, OBAYASHI Shigeru, ENDOU Eiichi

    Fluids engineering conference ...　2006　"1303-a"　2006/10/28

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-2882

  148. 1303 Reproduction of clear air turbulence using flight data and its data mining(2)

    MISAKA Takashi, OBAYASHI Shigeru, ENDOU Eiichi

    Fluids engineering conference ...　2006　"1303-1"-"1303-4"　2006/10/28

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-2882

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    In this study, a numerical simulation of clear air turbulence (CAT) was carried out by an large eddy simulation (LES). Measurement-integrated simulation based on four-dimensional variational method (4D-Var) was introduced because it is difficult to determine initial and boundary condition for CAT. The 4D-Var is formulated as a minimization problem of a cost function of initial flow variables, thus an adjoint code was developed to obtain gradient of the cost function at one time. The 4D-Var was applied to the flight data obtained when an aircraft encountered CAT. Characteristic vortices which correspond to CAT was reproduced by the 4D-Var. And then, power spectrum density of reproduced flow field was investigated.

  149. 流れの最適化とソフトコンピューティング

    鄭 信圭, 大林 茂

    機械の研究　58　(10)　1016-1022　2006/10

    Publisher: 養賢堂

    ISSN： 0368-5713

  150. 産学研連携と技術チャレンジ

    大林 茂

    日本航空宇宙学会誌　54　(633)　283-286　2006/10

  151. 多目的最適化とデータマイニング

    大林 茂

    日本機械学会誌　109　(1050)　383-385　2006/05

  152. Multi-Objective Design Optimization of an Air Cleaner Fan Using Kriging Models :

    Sugimura Kazuyuki, Iwase Yukiji, Shimoyama Koji, Jeong Shinkyu, Obayashi Shigeru

    Proceedings of International Workshop on Multidisciplinary Design Exploration in …　2006　105-112　2006

    Publisher: 日本機械学会

  153. Multidisciplinary Design Exploration for Transonic Regional-Jet Wing Shape :

    CHIBA Kazuhisa, JEONG Shinkyu, OBAYASHI Shigeru, MORINO Hiroyuki

    Proceedings of International Workshop on Multidisciplinary Design Exploration in …　2006　1-8　2006

    Publisher: 日本機械学会

  154. Design optimization of combustion chamber geometry for low emission diesel engine

    The Memoirs of the Institute of Fluid Science,Tohoku University　17　1-8　2006

    Publisher: 東北大学流体科学研究所

    ISSN： 0916-2860

  155. Mutlidiscplinary Design Optimization if Wing Shape for a Small Jet Aircraft Using Kriging Model

    T. Kumano, S. Jeong, S. Obayashi, Y. Ito, K. Hatanaka, H. Morino

    Proceedings of 44th AIAA Aerospace Sciences Meeting and Exhibit　2006

  156. Diesel Engine Piston Shape Design Using Multi-Objective Efficient Global Optimization

    Shinky Jeong, Youich Minemura, Shigeru Obayashi

    International Conference on Parallel Computational Fluid Dynamics 2006　2006

  157. Multi-Objective Design Exploration for Multidisciplinary Design Optimization of Aircraft

    S. Jeong, T. Kumano, S. Obayashi

    Proceedings of International Conference on Nonlinear Problems in Aviation and Aerospace 2006　2006

  158. Optimization of Piston for Diesel Engine Using Kriging Model

    S. Jeong, Y. Minemura, S. Obayashi

    The European Community on Computational Methods in Applied Science CFD 2006　2006

  159. Multidisciplinary Design Optimization of Wing Shape with Nacelle and Pylon

    T. Kumano, S. Jeong, S. Obayashi, Y. Ito, K. Hatanaka, H. Morino

    The European Community on Computational Methods in Applied Science CFD 2006　2006

  160. Design Exploration into a Tire Noise Reduction Problems

    S. Jeong, J. Lim, S. Obayashi, M. Koishi

    Proceedings of International Workshop on Multidisciplinary Design Exploration in Okinawa 2006　2006　77-82　2006

    Publisher: 日本機械学会

  161. 1112 Optimization of Piston Geometry for Diesel Engine Combustion

    Minemura Youichi, Jeong Shinkyu, Obayashi Shigeru

    2005　(15)　60-63　2005/08/02

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-0286

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    For diesel engine combustion, nitrogen oxide (NOx) and soot emissions are major problems. These emissions are mainly controlled by piston geometry. In this work, we conduct multi-objective optimization of piston geometry. Objective functions are related to NOx, soot and CO emissions, as well as indicated thermal efficiency. Theses values are evaluated by GTT code that takes into account the fluid, fuel spray and combustion. Genetic Algorithm using Kriging approximation model is applied as optimization tool. The result shows that optimized shape reduces emissions as well as maintains thermal efficiency.

  162. 1113 Basic Research for Supersonic Flight by Busemann's Biplane

    Yonezawa Masahito, Yamashita Hiroshi, Goto Yuichiro, Kusunose Kazuhiro, Obayashi Shigeru

    2005　(15)　64-65　2005/08/02

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-0286

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    In supersonic flights, we face "sonic boom" problem. Sonic boom is a byproduct of shock waves. Busemann's Biplane has been proposed for a significant reduction of shock wave. The interaction of shock wave between the two wings cancels out or reduces the shock wave created by individual wings. In this research, reflection of shock wave is determined by the non-linear theory. Simple extension of Busemann's Biplane for three-dimensional wing causes three-dimensional effect near wing tip. Therefore, winglet is attached to reduce this effect. CFD (Computational Fluid Dynamics) code is used to simulate flow around Busemann's Biplane to investigate the effect of winglet.

  163. Multi-Objective Optimization and Visualization of High Dimensions

    OBAYASHI Shigeru

    Journal of the Visualization Society of Japan　25　(1)　9-12　2005/03/15

    Publisher: 可視化情報学会

    ISSN： 0916-4731

  164. AM05-20-006 Application of correlation based transition model to flows around wings

    Misaka Takashi, Obayashi Sigeru

    2005　262-262　2005

    Publisher: 日本流体力学会

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    In this paper, the γ-Re_θ transition model proposed by Menter et al. is applied to the stall prediction of NACA64_A-006 airfoil. Detailed discussions of the γ-Re_θ transition model are made with some computational results.

  165. The Application of MDO Technologies to the Design of a High Performance Small Jet Aircraft – Lessons learned and some practical concerns -

    K. Takenaka, S. Obayashi, K. Nakahashi, K. Matsushima

    Proceedings of 35th AIAA Fluid Dynamics Conference and Exhibit　AIAA 2005-4797-　2005

  166. Efficient Global Optimization (EGO) for Multi-Objective Problem and Data Mining

    Shinkyu Jeong, Shigeru Obayashi

    Proceeding of Congress on Evolutionary Computation 2005　3　2138-2145　2005

  167. Multi-Objective Design Exploration for Aerodynamic Configurations

    S. Obayashi, S. Jeong, K. Chiba

    Proceedings of 23rd AIAA Applied Aerodynamics Conference　2005

  168. Data Mining for Multidisciplinary Design of Regional-Jet Wing

    Kazuhisa Chiba, Shinkyu Jeong, Shigeru Obayashi, H. Morino

    Proceeding of Congress on Evolutionary Computation 2005　3　2333-2340　2005

  169. Shape Optimization of Fish Tail Propulsion with Hydro-Elastic Effects

    E. Shimizu, S. Jeong, K. Isogai, S. Obayashi

    Proceedings of EUROGEN 2005　2005

  170. Minimization of the Wave Drag of a Fleet of Supersonic Aircrafts

    Y. Goto, S. Jeong, S. Obayashi, Y. Kohama

    Proceedings of EUROGEN 2005　2005

  171. 統合的最適化のための多目的進化的計算法

    佐々木大輔, 大林茂

    日本航空宇宙学会誌　52　(608)　250-257　2004/09

    Publisher: 日本航空宇宙学会

  172. C122 Multi-Objective Optimization of Constrained Problem Using Approximation Model

    JEONG Shinkyu, OBAYASHI Shigeru

    2004　88-89　2004

    Publisher: 日本流体力学会

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    In this study, Kriging model is applied to an optimization of the constrained design problem. The Kriging model predicts not the function value itself but the distribution of a function value at an unknown point. This property makes it possible to improve accuracy of model and exploration of global optimum at the same time. Constraint effect is imposed by calculating the probability of satisfying constraint conditions. Result shows the validity of the present method.

  173. Kriging-Based Probabilistic Method for Constrained Multi-Objective Optimization Problem

    S. Jeong, S. Obayashi, K. Yamamoto

    Proceedings of 1st AIAA Inteligent Systems Technical Conference　2004

  174. Adaptive Design Space Method Using Kriging-based Probabilistic Method

    S. Jeong, S. Obayashi

    Proceedings of The Third China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems　651-656　2004

  175. Evolutionary Design Optimization of Wing Shape for RLV Booster Stage Using Unstructured Navier-Stokes Computation

    CHIBA Kazuhisa, OBAYASHI Shigeru, NAKAHASHI Kazuhiro

    2003　(13)　303-304　2003/10/30

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-0286

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    The wing shape of booster stage for Two-Stage-To-Orbit Reusable Launch Vehicle is optimized in consideration of supersonic region, transonic cruise and subsonic landing. Navier-Stokes computation is used for aerodynamic evaluation because transonic cruise and subsonic landing have flow condition that vorticity dominants. ARMOGA is used for aerodynamic optimization problem with four objective functions because it is expected that tradeoff can be obtained using low individual numbers. The results show the relationship of each objective functions.

  176. Multi Objective Design Study of a Flapping Wing Generator

    SHIMIZU Eriko, ISOGAI Koji, OBAYASHI Shigeru

    2003　(13)　293-294　2003/10/30

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-0286

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    Flutter is destructive self-excited oscillation, which occurs when wind power is infused into aeronautical/industrial structures such as aircrafts and suspension bridges. Flapping power generator is a system which extracts wind energy from it. Recently, Isogai et al. proposed a new system. In his system, wing is supported elastically in heaving oscillation while the pitching oscillation of the whole wing is mechanically driven by an electric motor with a prescribed frequency and pitch amplitude. This system is governed by six non-dimensional parameters. In his study, these design parameters were optimized to maximize power efficiency by using "Complex Method". This paper considers multi-objective optimization of Isogai's "Flapping Wing Power Generator". In this study, objective functions are efficiency and power. To obtain a wide variety of Pareto solutions efficiently, one of Evolutionary Algorithms, Adaptive Neighboring Search (ANS), has been extended for the present optimization. In result we obtained unique tradeoff from the non-dominated solutions and solutions as good as by "Complex Method".

  177. 進化的計算法によるトレードオフの発見について

    大林 茂, 佐々木 大輔, 大山 聖

    計算数理工学レビュー　2003　(1)　13-26　2003/10

    Publisher: 日本計算数理工学会

    ISSN： 1348-7353

  178. Multiobj ective Design Optimization of Aircraft Configuration(<Special Issue>Recent Progress in Genetic Algorithms)

    OBAYASHI Shigeru, Shigeru Obayashi, Institute of Fluid Science Tohoku University

    Journal of Japanese Society for Artificial Intelligence　18　(5)　495-501　2003/09/01

    Publisher: 人工知能学会

    ISSN： 0912-8085

  179. W06-(3) 航空宇宙における CFD 応用

    大林 茂

    年次大会講演資料集　(3)　306-307　2003/08/05

    Publisher: 一般社団法人日本機械学会

  180. Introduction to Optimization Problems in Fluids (2)

    OHBAYASHI Shigeru, SASAKI Daisuke

    Journal of the Japan Society for Computational Engineering and Science　8　(3)　758-765　2003/07/30

    Publisher: 日本計算工学会

    ISSN： 1341-7622

  181. 流体問題最適化入門（2）

    大林茂, 佐々木大輔

    日本計算工学会 「計算工学」 チュートリアル　8　(3)　694-699　2003/07

    Publisher: 日本計算工学会

  182. 航空機空力設計における多目的最適化

    大林 茂

    システム/制御/情報　47　(6)　253-258　2003/06

    DOI： 10.11509/isciesci.47.6_253 　

  183. Introduction to Optimization Problems in Fluids(1)

    OHBAYASHI Shigeru, SASAKI Daisuke

    8　(2)　22-27　2003/04/30

    Publisher: 日本計算工学会

    ISSN： 1341-7622

  184. 流体問題最適化入門（１）

    大林茂, 佐々木大輔

    日本計算工学会 「計算工学」 チュートリアル　8　(2)　694-699　2003/04

    Publisher: 日本計算工学会

  185. Numerical simulation: Supersonic flow around wing-body configuration with integrated engine nacelle

    M Kanazaki, S Obayashi, K Nakahashi

    AIAA JOURNAL　41　(2)　213-217　2003/02

    DOI： 10.2514/2.1963 　

    ISSN： 0001-1452

  186. レイノルズ数6×106域での前縁剥離渦の挙動に関する数値的研究

    千葉 一永, 大林 茂, 中橋 和博

    東北大学流体科学研究所報告　14　31-37　2003

    Publisher: 東北大学流体科学研究所

    ISSN： 0916-2860

  187. Aerodynamic Optimization of Supersonic Transport at Near-Sonic Regime

    Wataru Yamazaki, Kisa Matsushima, Shigeru Obayashi, Kazuhiro Nakahashi

    Journal of the Japan Society for Aeronautical and Space Sciences　51　(597)　577-581　2003

    Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

    DOI： 10.2322/jjsass.51.577 　

    ISSN： 1344-6460

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    Recently, an airplane cruising at near-sonic regime is watched with keen interest. The Sonic-Cruiser, of which the Boeing Company has examined and challenged the development, is the most remarkable case. In this paper, motivated by this trend, aerodynamic performance optimization for an airplane cruising at near-sonic regime is discussed based on CFD simulations. NAL&rsquo;s experimental supersonic airplane, called NEXST-1, was employed as the baseline model for optimization. Aerodynamic performance was evaluated by solving the Euler equations with the unstructured grid method. It was confirmed that the performance Euler simulation predicted was qualitatively correct. By the evaluation to select a baseline model for optimization, NEXST-1 was accepted as a candidate of sonic plane because of the existence of drag bucket at near-sonic regime. In the optimization, Genetic Algorithm was used with Euler simulations. The objective was to reduce drag keeping lift constant, at the flying speed of Mach 0.98. The optimized result showed L/D improvement not only for near-sonic regime but also for transonic regime. The mechanism of design to reduce drag force was found through the analysis and comparison of the geometries and aerodynamic phenomena about the baseline model and the optimized one.

  188. 110 Gust Response Simulation for a Flexible Aircraft

    YANG Guowei, OBAYASHI Shigeru

    The Computational Mechanics Conference　2002　(15)　19-20　2002/10/30

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  189. Aerodynamic Design Optimization Using Evolutionary Algorithms

    OBAYASHI Shigeru

    Turbomachinery.　30　(5)　1-6　2002/05/10

    Publisher: 日本工業出版

    ISSN： 0385-8839

  190. New Stage of CFD Application : Numerical Optimization

    OBAYASHI Shigeru

    Journal of the Japan Society of Mechanical Engineers　105　(999)　64-69　2002/02/05

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 0021-4728

  191. 531 Numerical Simulation of Supersonic Flow around Wing-Body Configuration with Integrated Engine nacelle

    KANAZAKI Masahiro, OBAYASHI Shigeru, NAKAHASHI Kazuhiro

    The Computational Mechanics Conference　2001　(14)　595-596　2001/11/27

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  192. F06-3 Multiobjective Optimization and Visualization of Pareto Solutions

    Obayashi Shigeru

    The Computational Mechanics Conference　2001　(14)　699-700　2001/11/27

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  193. 704 Self-Organizing Map of Pareto Solutions for Multiobjective Supersonic Wing Design

    Obayashi Shigeru, Sasaki Daisuke

    Fluids engineering conference ...　2001　96-96　2001/09/28

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-2882

  194. 706 Design Optimization of Exhaust Manifold for a Car Engine Using MOGA

    KANAZAKI Masahiro, OBAYASHI Shigeru, NAKAHASHI Kazuhiro

    Fluids engineering conference ...　2001　98-98　2001/09/28

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-2882

  195. 自動車エンジン排気系形状の多目的最適化

    金崎 雅博, 大林 茂, 中橋 和博

    東北大学流体科学研究所報告　12　53-59　2001

    Publisher: 東北大学流体科学研究所

    ISSN： 0916-2860

  196. Advanced Unstructured-Grid Methods and Aerodynamic Optimization

    Obayashi Shigeru, Nakahashi Kazuhiro

    2001　555-556　2001

    Publisher: 日本流体力学会

    ISSN： 1342-8004

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    This paper summarizes applications of unstructured grid methods and aerodynamic optimization to supersonic transport configuration. A seamless procedure from CAD data to CFD surface grid has been developed for unstructured grid methods. The detailed flow analysis using the precise launching configuration of NAL scaled supersonic experimental airplane reveals that even a small part can have a significant effect to aerodynamic performance especially at transonic conditions. The adjoint method has been developed for efficient aerodynamic optimization. Evolutionary algorithms are also applied for the global optimization.

  197. Aerodynamic Desging of a Medium Size Blended-Wing-Body Airplane

    T. E. Pambagjo, K. Nakahashi, S. Obayashi, K. Matsushima

    AIAA Paper:39th AIAA Aerospace Sciences Meeting and Exhibit　AIAA Paper 2001-0129-　2001

  198. Wing Design for Supersonic Transport by Adaptive Range Multi-Objective Genetic Algorithms

    SASAKI Daisuke, MORIKAWA Masashi, OBAYASHI Shigeru, NAKAHASHI Kazuhiro

    The Computational Mechanics Conference　2000　(13)　303-304　2000/11/27

    Publisher: The Japan Society of Mechanical Engineers

    ISSN： 1348-026X

  199. Adaptive Range Multiobjective Genetic Algorithm

    MORIKAWA Masashi, OBAYASHI Shigeru, NAKAHASHI Kazuhiro

    2000　(4)　29-34　2000/10/03

    Publisher: The Japan Society of Mechanical Engineers

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    This paper describes a new multiobjective GA named Adaptive Range Multiobjective GA (ARMOGA). Adaptive Range GA (ARGA) has been extended to multiobjective optimization problems. It helps GAs to handle a large search space that requires continuous sampling. ARGA has two characteristics : de-coding based on Gaussian random number and adaptive search space renewed at a certain interval. The resulting AEMOGA is compared with the conventional MOGA by using test problems. The results confirm that ARMOGA consistently finds better solutions than the conventional MOGA.

  200. The Design Optimization of Intake/Exhaust Performance of a Car Engine

    KANAZAKI Masahiro, YANO Yasuhide, NAKAHASHI Kazuhiro, OBAYASHI Shigeru

    2000　381-382　2000

    Publisher: 日本流体力学会

    ISSN： 1342-8004

    More details Close

    To develop a better car engine, many design specifications are required because they would affect intake/exhaust system performance. Such specifications have to be found out trial and error by many experiments and analysises. Therefore the automated design optimization is desirable to reduce technical, schedule, and cost risks. This paper presents the development of the computer simulation program that predicts the intake/exhaust performance and optimizes it.

  201. Aerodynamic Optimization Using Real-Coded Adaptive Range Genetic Algorithm

    OBAYASHI Shigeru, OYAMA Akira

    18　373-374　1999/07/29

    ISSN： 1342-8004

  202. Design Optimization of the Next Generation SST Using Genetic Algorithms

    OBAYASHI Shigeru, HIROSE Naoki

    IEICE technical report. Artificial intelligence and knowledge-based processing　99　(96)　63-69　1999/05/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    This paper describes the design optimization of a wing for supersonic transport (SST) using Multi-Objective Genetic Algorithm (MOGA). The objective functions are to minimize the drag for transonic cruise, the drag for supersonic cruise and the bending moment at the wing root for supersonic cruise. The wing shape is defined by planform and warp shapes in total of 66 design variables. An Euler code is used to evaluate supersonic performance, and a potential code is used to evaluate transonic performance. To reduce the enormous total calculation time, the CFD ca1culations are parallelized on NEC SX-4 (32PE) at Computer Center of Tohoku University. The Pareto optimal solutions are obtained in the three dimensional objective function space by the present approach. One of the Pareto solutions is found to outperform an existing design based on the linearied theory.

  203. APPLICATION OF EVOLUTIONARY ALGORITHMS TO AERODYNAMIC WING DESIGNS

    OYAMA Akira, OBAYASHI Shigeru, NAKAHASHI Kazuhiro, HIROSE Naoki

    Proceedings of the conference on computational engineering and science　4　(1)　475-478　1999/05/26

    Publisher: 日本計算工学会

    ISSN： 1342-145X

  204. Aerodynamic Shape Optimization of a Three-Dimensional Wing by Genetic Algorithm

    OYAMA Akira, OBAYASHI Shigeru, NAKAHASHI Kazuhiro, NAKAMURA Takashi

    Aeronautical and space sciences Japan　46　(539)　682-686　1998/12/05

    Publisher: 日本航空宇宙学会

    ISSN： 0021-4663

  205. JAVAによる鳥人間滑空機の最適設計システム

    内山 薫, 大林 茂, 中橋 和博

    スカイスポ-ツシンポジウム講演集　(4)　21-24　1998

    Publisher: 日本航空宇宙学会

  206. Cascade Airfoil Design by Multiobjective Genetic Algorithms(Proceedings of the 15th NAL Symposium on Aircraft Computational Aerodynamics)

    Tsukahara Takanori, Obayashi Shigeru, Nakahashl Kazuhiro, Nakamura Takashi

    Special publication of National Aerospace Laboratory : SP　37　PHYS259-264　1998

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  207. Wing Planform Design Using Multidisciplinary Optimization(Proceedings of the 15th NAL Symposium on Aircraft Computational Aerodynamics)

    Yamaguchi Yoshihiro, Obayashi Shigeru, Nakahashi Kazuhiro, Nakamura Takashi

    Special publication of National Aerospace Laboratory : SP　37　247-252　1998

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  208. Inverse Design Method for Wing of Supersonic Transport(Proceedings of the 15th NAL Symposium on Aircraft Computational Aerodynamics)

    Jeong Shinkyu, Obayashi Shigeru, Nakahashi Kazuhiro, Matsushima Kisa, Iwamiya Toshiyuki

    Special publication of National Aerospace Laboratory : SP　37　87-92　1998

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  209. Aerodynamic Optimization of Three-dimensional Transonic Wing(Proceedings of the 15th NAL Symposium on Aircraft Computational Aerodynamics)

    Oyama Akira, Obayashi Shigeru, Nakahashi Kazuhiro, Nakamura Takashi

    Special publication of National Aerospace Laboratory : SP　37　253-258　1998

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  210. Design Optimization of Supersonic Wings Using Evolutionary Algorithms

    Obayashi, S, Nakahashi, K, Oyama, A, Yoshino, N

    Proc. of the Fourth ECCOMAS Computational Fluid Dynamics Conference　575-579　1998

  211. Coding by Taguchi Method for Evolutionary Algorithms Applied to Aerodynamic Optimization

    Oyama, A, Obayashi, S, Nakahashi, K, Hirose, N

    Proc. the Fourth ECCOMAS Computational Fluid Dynamics Conference　916-203　1998

  212. A supersonic inverse wing design method and its application to Japanese SST

    K Matsushima, S Jeong, R Takaki, S Obayashi, K Nakahashi, T Iwamiya

    SIXTEENTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN FLUID DYNAMICS　515　79-84　1998

    ISSN： 0075-8450

  213. Inverse Design Method for Wings of Supersonic Transport

    S. Jeong, K. Matsushima, T. Iwamiya, S. Obayashi, K. Nakahashi

    Proceedings of 36th AIAA Aerospace Sciences Meeting and Exhibit　1998

  214. Optimization of Wing Planform with Structural Constrains(Proceedings of the 14th NAL Symposium on Aircraft Computational Aerodynamics)

    Yamaguchi Yoshihiro, Obayashi Shigeru, Nakahashi Kazuhiro

    Special publication of National Aerospace Laboratory : SP　34　113-118　1997

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  215. Aerodynamic Design and CFD evaluation of a High Speed Commercial Transport(Proceedings of the 14th NAL Symposium on Aircraft Computational Aerodynamics)

    Yamakami Katsuhiko, Nakahasi Kazuhiro, Obayashi Sigeru

    Special publication of National Aerospace Laboratory : SP　34　119-124　1997

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  216. Three-Dimensional Aerodynamic Optimization(Proceedings of the 14th NAL Symposium on Aircraft Computational Aerodynamics)

    Oyama Akira, Obayashi Shigeru, Nakahashi Kazuhiro, Nakamura Takashi

    Special publication of National Aerospace Laboratory : SP　34　107-112　1997

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  217. Aerodynamic Design and Inverse Problem

    OBAYASHI Shigeru

    1　(3)　136-142　1996/09/30

    ISSN： 1341-7622

  218. Challenge to Fluid Dynamics for Aerodynamic Optimization

    OBAYASHI Shigeru, TSUKAHARA Takanori

    15　283-284　1996/07

    ISSN： 1342-8004

  219. Aerodynamic Inverse Optimization Method for Transonic Wings(Proceedings of the 13th NAL Symposium on Aircraft Computational Aerodynamics)

    Obayashi Shigeru, Takanashi Susumu

    Special publication of National Aerospace Laboratory : SP　30　29-34　1996

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  220. Numerical Simulations of Aerodynamic Contribution of Flows about a Space-plane-type Configuration(Proceedings of the 5th NAL Symposium on Aircraft Computational Aerodynamics)

    Matsushima Kisa, Takanashi Susume, Fujii Kozo, Obayashi Shigeru

    Special publication of National Aerospace Laboratory : SP　8　13-18　1987

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  221. Numerical Simulation of Viscous Flows Over Transonic Aircraft Configurations(Proceedings of the 5th NAL Symposium on Aircraft Computational Aerodynamics)

    Takanashi Susumu, Yoshida Masahiro, Fujii Kozo, Matsushima Kisa, Obayashi Shigeru

    Special publication of National Aerospace Laboratory : SP　8　85-90　1987

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  222. FDM-FEM Zonal Approach for Viscous Flow Computations Over Multiple-Bodies

    K. Nakahashi, S. Obayashi

    AIAA 25th Aerospace Sciences Meetings, AIAA Paper 87-0604　1-9　1987

  223. FDM-FEM Method for Viscous Flow Computations Over Multiple-Bodies

    K. Nakahashi, S. Obayashi

    航空宇宙技術研究所技術報告　NAL TR-925T　1987

  224. Relaxation Method for the Compressible Navier-Stokes Equations Using Upwind Schemes(Proceedings of the 4th NAL Symposium on Aircraft Computational Aerodynamics)

    Obayashi Shigeru, Fujii Kozo, Kuwahara Kunio

    Special publication of National Aerospace Laboratory : SP　7　249-254　1986

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  225. Navier-Stokes Simulation of Transonic Transportation Aircraft Configurations I. -Flow-field simulation over wing-fuselage combinations-(Proceedings of the 4th NAL Symposium on Aircraft Computational Aerodynamics)

    Fujii Kozo, Takanashi Susumu, Obayashi Shigeru

    Special publication of National Aerospace Laboratory : SP　7　289-298　1986

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  226. Practical and Modern Simulation by Systematic Connection of the LU-ADI Code and the Solution Adaptive Grid Program(Proceedings of the 4th NAL Symposium on Aircraft Computational Aerodynamics)

    Matsuhima Kisa, Obayashi Shigeru, Nakahashi Kazuhiro, Fujii Kozo

    Special publication of National Aerospace Laboratory : SP　7　53-60　1986

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  227. Computation of Three-Dimensional Viscous Transonic Flows Using the LU-ADI Factored Scheme

    FUJII Kozo, OBAYASHI Shigeru

    Technical report of National Aerospace Laboratory　889　1-18　1985

    Publisher: Japan Aerospace Exploration Agency

    ISSN： 1347-4588

  228. Evaluation of Euler and Navier-Stokes Solutions for Leading-Edge and Shock-Induced Separations

    FUJII Kozo, OBAYASHI Shigeru

    Technical report of National Aerospace Laboratory　886　1-22　1985

    Publisher: Japan Aerospace Exploration Agency

    ISSN： 1347-4588

  229. The Reliability of Numerical Solutions for the Viscous Transonic Flows over an Airfoil(Proceedings of the 3rd NAL Symposium on Aircraft Computational Aerodynamics)

    Matsushima Kisa, Obayashi Shigeru, Fujii Kozo

    Special publication of National Aerospace Laboratory : SP　5　167-174　1985

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  230. Numerical Simulation of Transonic Flow Fields by Solving the Three-Dimensional Navier-Stokes Equations(Proceedings of the 3rd NAL Symposium on Aircraft Computational Aerodynamics)

    Fujii Kozo, Yoshida Masahiro, Obayashi Shigeru

    Special publication of National Aerospace Laboratory : SP　5　159-166　1985

    Publisher: 独立行政法人航空宇宙技術研究所

    ISSN： 0289-260X

  231. Fine Structure of Interaction of Shock Wave with Boundary Layer(Solutions of the Navier-Stokes Equations)

    Obayashi Shigeru

    RIMS Kokyuroku　539　136-156　1984/10

    Publisher: Kyoto University

    ISSN： 1880-2818

Show all ︎Show first 5

Books and Other Publications 26

  1. JST 研究開発俯瞰報告書 環境・エネルギー分野（2021年）

    大林茂

    CRDS 国立研究開発法人科学技術振興機構 研究開発戦略センター　2021/03

  2. データ同化流体科学: 流動現象のデジタルツイン

    大林 茂, 三坂 孝志, 加藤 博司, 菊地 亮太

    共立出版　2021/01/13

    ISBN: 9784320111264

    More details Close

    本書は流体工学の知識を有する理工系学生・技術者を主な対象とし，計測データに基づいて計算機援用工学(CAE)シミュレーションの精度を向上させるデータ同化の基礎から実装，そして，応用までをバランス良く学ぶための教科書である。 データ同化理論および数値流体力学に関して簡潔に説明したあとで，データ同化アルゴリズムを数値流体力学コードにおいて実装する際の詳細を説明するようにした。特にアンサンブルカルマンフィルタにおけるアンサンブルの推定結果への影響や4次元変分法におけるアジョイントコードの具体的な構築方法など，通常，専門書や論文には十分に記述されないノウハウ的な内容も可能な限り解説した。本書で使用したデータ同化コードはWebサイトから自由に入手できるので，本書の内容と合わせて利用いただくことでデータ同化に対する理解がさらに深まると考えられる。 機械学習・深層学習の応用分野の広がりによってベイズ推定の有用性が改めて認識されている中で，数値シミュレーションと計測データを使ってベイズ推定を実現するデータ同化は，数値シミュレーションや実験計測に取り組む研究者・技術者にとって問題解決のための新たなアプローチとなりうると期待される。

  3. シミュレーション辞典

    下山幸治, 大林茂

    コロナ社 日本シミュレーション学会（編）　2012

  4. Evolutionary and Deterministic Methods for Design, Optimization and Control with Applications to Industrial and Societal Problems

    Koji Shimoyama, Shu Yoshimizu, Shinkyu Jeong, Shigeru Obayashi, Yasuyuki Yokono

    Tadeusz Burczynski and Jacques Périaux (Eds.)　2011

  5. 宇宙航空研究開発機構特別資料 第３回EFD/CFD融合ワークショップ JAXA Special Publication The 3rd Workshop on Intergration of EFD and CFD

    大林茂

    JAXA　2010/08

  6. Computational Fluid Dynamics Review 2010

    Dong. Seop Lee, Karkenahalli Srinivas, Luis. Felipe Gonzalez, Jacques Periaux, Shige

    World Scientific　2010/06/30

  7. フルードインフォマティクス「流体力学」と「情報科学」の融合

    大林茂, 白山普, 中村育雄, 早瀬敏幸, 藤代一成, 渡邉崇

    技報堂出版　2010/04/30

  8. 仙台空港における後方乱気流の計測融合シミュレーション

    大林茂, 三坂孝志

    日本計算工学会・財団法人計算科学振興財団編，丸善株式会社　2009/12

  9. 多分野融合最適設計

    大林茂, 熊野孝保

    日本計算工学会・財団法人計算科学振興財団編，丸善株式会社　2009/12

  10. Multi-Objective Memetic Algorithms, Chi-Keong Goh, Yew-Soon Ong, and Kay Chen Tan (Eds.), Studies in Computational Intelligence, Vol. 171

    Koji Shimoyama, Jin Ne Lim, Shinkyu Jeong, Shigeru Obayashi, Masataka Koishi

    Springer-Verlag, Berlin Heidelberg　2009/04

  11. "Multi-Objective Robust Optimization Assisted by Response Surface Approximation and Visual Data-Mining," Multi-Objective Memetic Algorithms, Goh, C.-H., Ong, Y.-S., and Tan, K. C., Eds., Studies in Computational Intelligence

    Shimoyama, K, Lim, J. N, Jeong, S, Obayashi, S, Koishi, M

    Springer-Verlag, Berlin Heidelberg　2009/01

  12. 機械工学便覧 基礎編α6 計算力学

    相澤龍彦, 阿部和久, 天谷賢治他

    社団法人 日本機械学会　2007/06/25

  13. Evolutionary Multi-Criterion Optimization:Lecture Notes in Computer Science 3410

    Shigeru Obayashi, Kalyanmoy Deb, Carlo Poloni

    Springer-Verlag Berlin Heidelberg,　2007/03

  14. Aerodynamic Design of Supersonic Biplane: Cutting Edge and Related Topics

    Kazuhiro Kusunose, Kisa Matsushima, Shigeru Obayashi

    Tohoku University Press　2007/03

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    The 21st Century COE Program International COE of Flow Dynamics Lecture Series Volume 5.

  15. 計算力学ハンドブック

    岩津玲磨, 大島伸行, 大林茂他

    日本機械学会　2006/03/10

  16. New Developments in Computational Fluid Dynamics

    Kozo Fujii, Kazuhiro Nakahashi, Shigeru Obayashi, Satoko Komurasaki

    Springer, Berlin　2005/12

  17. Applications of Multi-Objective Evolutionary Algorithms

    Coello Coello, Lamont

    World Scientific Publishing, New Jersey　2004/12

  18. Frontiers of Computational Fluid Dynamics 2002

    S. Obayashi, Y. Takeguchi, D. Sasaki

    2002

  19. Airfoil Shape Parameterization for Evolutionary Computation

    S. Obayashi

    2000

  20. Multiobjective Evolutionary Computation for Supersonic Wing Design

    S. Obayashi

    2000

  21. 乱流の数値流体力学-モデルと計算法

    大林 茂

    1998/01

  22. Genetic Algorithms in Engineering and Computer Science

    S. Obayashi

    1998/01

  23. Genetic algorithms in engineering systems

    S. Obayashi

    1997/09

  24. Aerodynamic Optimization with Evolutionary Algorithms

    Shigeru Obayashi

    1997/04

  25. Target Pressure Optimization Using MOGA

    Shigeru Obayashi

    1997/04

  26. ALGORITHM DEVELOPMENT WITH APPLICATIONS TO AERODYNAMICS AND AEROELASTICITY

    Peter M. Goorjian, Shigeru Obayashi, Neal M. Chaderjian, Guru P. Guruswamy

    1992

Show all Show first 5

Presentations 570

  1. 磁力支持天秤装置を用いた鈍頭物体の風洞試験技術と課題

    奥泉 寛之, 大林 茂, 小西 康郁

    第63回飛行機シンポジウム プログラム　2025/10/15

  2. アンモニアターボファンエンジン搭載航空機の概念設計と性能評価

    大林茂, 阿部圭晃

    第63回飛行機シンポジウム　2025/10/16

  3. サイクル計算を用いたアンモニアターボファンエンジンの性能分析

    和田朋也, 中村寿, 早川晃弘, 大林茂

    日本航空宇宙学会北部支部２０２５年講演会ならびに第６回再使用型宇宙輸送系シンポジウム　2025/03/10

  4. Scanning Stereoscopic PIV for 3D Wake Structure of Cylindrical Blades with Fins on a Magnus Wind Turbine

    I. Okuyama, K. Nakagawa, H. Hasegawa, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/20

  5. Aerodynamic Discrepancies of an Aircraft Considering the Running Engine

    J. Mueller, K. Chiba, Y. Oba, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/20

  6. Analysis of Aerodynamic Forces and Flow Field on a Roadable Aircraft against Crosswind during Landing

    S. Morizawa, R. Sakai, R. Kikuchi, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/20

  7. Explainable Machine Learning for Aerodynamic Design Exploration

    P. S. Palar, L. R. Zuhal, K. Shimoyama, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/20

  8. Backup Power Supply using Flapping Wing Antennas

    H. Izumi, T. Ishide, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/20

  9. Numerical Analysis of the Flow around a Wing-body Combination Model with Three-degree-of-freedom Flapping

    M. Mitsunaga, T. Ishide, H. Izumi, H. Tamagawa, A. Harada, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/20

  10. Layout of Ducted Fan between Aero--Train Wings

    C. Lai, J. He, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/20

  11. Construction of Actuator Placement Optimization Framework Toward Realization of Efficient Weather Modification Technology

    T. Naruse, T. Nagata, Y. Sasaki, M. Watanabe, K. Yamada, J. Ito, J. A. I. Paski, D. Tsubakino, S. Obayashi, T. Nonomura

    Twenty-first International Conference on Flow Dynamics　2024/11/20

  12. Characterizing Atmospheric Conditions for Sonic Boom Loudness

    H. Yamashita, B. Kern, T. Ukai, T. Misaka, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/20

  13. Study on Heat Flux Prediction Method for Cartesian-Mesh CFD under Supersonic Flows

    D. Sasaki, M. Yukimitsu, S. Ogawa, S. Yoshinaga, H. Moriai, S. Takahashi, A. Yakeno, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/19

  14. Feasibility Study of Ammonia Fueled Commercial Aircraft

    T. Wada, K. Iijima, D. Shimokuri, A. Hayakawa, H. Nakamura, Y. Fujimoto, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/19

  15. Uncertainty Quantification of Aerostructual Properties on Composite Wing Design

    K. Nakamura, Y. Abe, K. Shimoyama, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/19

  16. Aerodynamic Characteristics of a Space Orbital Plane Model Measured with 1-m Magnetic Suspension and Balance System

    N. So, I. Kida, R. Haga, M. Miyagi, H. Okuizumi, S. Obayashi

    Twenty-first International Conference on Flow Dynamics　2024/11/19

  17. A Decade of Progress in 1-m MSBS

    S.Obayashi, H.Okuizumi, H.Sawada, Y. Konishi, T. Nonomura, K. Asai

    Twenty-first International Conference on Flow Dynamics　2024/11/19

  18. Flow Visualization of the Vortical Flow Field around Fins Attached to a Rotating Cylinder for a Magnus Wind Turbine

    Ikki OKUYAMA, Hiroaki HASEGAWA, Shigeru OBAYASHI

    International Workshop on Advanced Experimental Mechanics for Students and Young Researchers 2024 (IWAEM'24)　2024/11/16

  19. 航空機主翼の圧縮強度における不確実性評価

    中村 勝海, 阿部 圭晃, 大林 茂

    第62回飛行機シンポジウム　2024/10/17

  20. 1-m 磁⼒⽀持天秤装置を⽤いた ALFLEX 模型の空⼒特性調査

    宗 巨樹, 木田 樹, 芳賀 琉晟, 宮城 武玖, 奥泉 寛之, 大林 茂

    第62回飛行機シンポジウム　2024/10/15

  21. DNS of Boundary-Layer Transition over a Transonic Swept Wing under Real Flight Condition

    Yuji Mori, Aiko Yakeno, Shigeru Obayashi

    2024 AIAA AVIATION Forum　2024/07/29

  22. Traveling Wave Generation in Swept-Wing Boundary Layer under Wall Surface Roughness and Free-Stream Turbulence

    Yuji Mori, Aiko Yakeno, Shigeru Obayashi

    Thirteen International Symposium on Turbulence Shear Flow Phenomena (TSFP13)　2024/06/25

  23. Laminarization of Supersonic Three-dimensional Boundary Layer by Sinusoidal Roughness Elements

    M. Hirota, S. Niwano, Y. Ide, Y. Hattori, S. Obayashi

    ECCOMAS 2024　2024/06/03

  24. フルードインフォマティクス2.0

    日本機械学会 講習会「流体とインフォマティクス」　2024/04/25

  25. ニューラルネットワークを援用した進化計算に よる複合材航空機の空力構造最適化

    西山 晶, 稲葉 裕太, 阿部 圭晃, Hariansyah Muhammad Alfiyandy, 兼田 陽可, 大林 茂

    第63回航空原動機・宇宙推進講演会／北部支部2024年講演会 ならびに第5回再使用型宇宙輸送系シンポジウム　2024/03/14

  26. デジタル時代の流体設計技術～データ同化によるシミュレーションの高精度化～

    大林茂

    石川県次世代産業育成講座・新技術セミナー　2024/02/19

  27. Polynomial-Based Shapley Additive Explanations for Design Exploration in Turbomachinery

    Pramudita Palar, Koji Shimoyama, Shigeru Obayashi

    2024 American Institute of Aeronautics and Astronautics SciTech Forum　2024/01

  28. Experimental Validation of the Suppression of Crossflow Instability by Sinusoidal Roughness Elements

    Sayaka Suzuki, Aiko Yakeno, Yasufumi Konishi, N. Tokugawa, Makoto Hirota, Hikaru Takami, Shigeru Obayashi

    2024 American Institute of Aeronautics and Astronautics SciTech Forum　2024/01/09

  29. Effects of Surface Roughness and Free-Stream Turbulence on Transition in Swept-Wing Boundary Layer

    Yuji Mori, Aiko Yakeno, Shigeru Obayashi

    2024 American Institute of Aeronautics and Astronautics SciTech Forum　2024/01/10

  30. Bayesian design optimization of a BLI propulsion fan with regenerative air brake for electric passenger aircraft

    Ryo Iijima, Koji Shimoyama, Shigeru Obayashi

    76th Annual Meeting of the Division of Fluid Dynamics　2023/11/20

  31. 鳥の飛行を規範とした小型飛行体の姿勢計測装置の開発

    平野政輝, 香川詩花, 泉源, 石出忠輝, 大林茂

    第61回飛行機シンポジウム　2023/11/17

  32. 鳥の飛行を規範とした革新的飛行体の開発

    香川詩花, 平野政輝, 泉源, 石出忠輝, 大林茂, 山崎渉

    第61回飛行機シンポジウム　2023/11/17

  33. オフトラックの騒音を考慮した低ブーム超音速旅客機翼胴形状のペイズ最適化

    明石朱里, 下山幸治, 大林茂

    第61回飛行機シンポジウム　2023/11/16

  34. Sonic Boom Variation in Realistic Atmospheres

    H. Yamashita, B. Kern, R. Iura, T. Ukai, T. Misaka, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  35. Numerical Analysis on Aeroacoustics of Multi-directional Wings Aligned in Tandem of the Aero-train

    C. Lai, Y. Zhu, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  36. Unsteady Flow Fields Induced by Rotating Cylinder with Fins in a Magnus Wind Turbine

    I. Okuyama, H. Hasegawa, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  37. Aerodynamic Effect of Engine Exhaust on Aircraft Whole Body - Integrated Analysis of Airframe and Running Engine Using Sliding-Mesh Method

    J. Mueller, K. Chiba, Y. Oba, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  38. Improved Reduced Order Model for Controlling 3-D unsteady Thermocapillary Convection

    M. Kudo, K. Tanaka, K. Aoki, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  39. Aerodynamic Design Exploration using Explainable Surrogate Model

    P. S. Palar, K. Shimoyama, J. Morlier, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  40. Initial Study for the Construction of Phenomenology-based Control-law for a Roadable Aircraft during Landing-phase around Okinawa’s Islands

    S. Morizawa, R. Sakai, R. Kikuchi, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  41. Development of an Innovative Air Vehicle based on a Flight of a Bird

    U. Kagawa, M. Hirano, T. Ishide, H. Izumi, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  42. Study on Heat Flux Prediction Method for Cartesian-Mesh CFD under Supersonic Flows

    D. Sasaki, K. Miyata, S. Ogawa, K. Mori, K. Abe, S. Yoshinaga, H. Moriai, S. Takahashi, A. Yakeno, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  43. Effects of Residence Time on NOx Emission of an Ammonia Fueled Supersonic Transportation

    H. Kosada, A. Hayakawa, H. Nakamura, D. Shimokuri, Y. Fujimoto, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/06

  44. Integrating Wing and Fuselage for Silent Supersonic Transport Designed at On-Track and Off-Track Conditions

    A. Akashi, K. Shimoyama, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/06

  45. Clarification of Flow Structures Related to Jet Noise Generation Using Mode Analysis and High-Precision Jet Flow Simulation

    S. Morita, A. Yakeno, C. Bogey, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/08

  46. Research and Development of Automatic Flight of Small Bird-Like Innovative Air Vehicle

    U. Kagawa, M. Hirano, H. Izumi, T. Ishide, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  47. Influence of Ground Clearance on Aerodynamic Characteristics of Aero-Train

    J. He, C. Lai, J. Song, S. Obayashi

    Twentieth International Conference on Flow Dynamics　2023/11/07

  48. The Differences of Aerodynamic Forces Between The Static Javelin and The Vibrating Javelin

    R. Ishiai, K. Seo, H. Okuizumi, Y. Konishi, S. Obayashi, S. Ito, M. Hiratsuka

    Twentieth International Conference on Flow Dynamics　2023/11/07

  49. Development of Wind Tunnel Digital Twin Using Data Assimilation

    Kyosuke Nomoto, Shigeru Obayashi

    IMACS2023　2023/09/15

  50. Reproduction of unsteady observation data by optimization of turbulence model parameters using data assimilation

    Atsuhito Kawabata, Aiko Yakeno, Shigeru Obayashi

    10th International Symposium on Turbulence, Heat, and Mass Transfer　2023/09/13

  51. Flow Sensitivity Analysis for the Feedback Loop Phenomenon of Subsonic Jet Noise Generation.

    S. Morita, A. Yakeno, C. Bogey, S. Obayashi

    iTi CONFERENCE ON TURBULENCE X

  52. Application of metal additive manufacturing to multi-material adhesion with CFRP through porosity control

    N. Takano, M. Mizutani, K. Shirasu, H. Yoshinaga, T. Oguri, K. Ogawa, T. Okabe, S. Obayashi

    The International Conference on Leading Edge Manufacturing/Materials & Processing (LEM&P 2023)　2023

  53. アンモニア燃料における旅客機の機体成立性検討

    飯島 啓伍, 大林 茂, 小佐田 一

    日本航空宇宙学会北部支部2023年講演会 ならびに 第4回再使用型宇宙輸送系シンポジウム　2023/03/21

  54. 流体とインフォマティクス

    大林茂

    日本機械学会流体工学部門企画講習会　2023/02/01

  55. Measurement of Aerodynamic Characteristics of Square Cylinders with Low Fineness Ratio Using 1-m Magnetic Suspension and Balance System

    Hiroyuki Okuizumi, Rintaro Makino, Hideo Sawada, Yasufumi Konishi, Shigeru Obayashi, Taku Nonomura

    AIAA SCITECH 2023 Forum　2023/01/23

  56. 胴体後部形状の変化によるBLIファン搭載電動ハイブリッド航空機の空力性能評価

    長橋昌平, 焼野藍子, 大林茂, 筒井裕貴, 横川譲

    第36回数値流体力学シンポジウム　2022/12/14

  57. 流動現象のデジタルツインを実現するデータ同化流体科学

    大林茂

    アドバンス・シミュレーション・セミナー2022　2022/12/09

  58. フルードインフォマティクス2.0

    大林茂

    日本機械学会関西支部第382回講習会（ネット配信WebEX） 実務者のための流体解析技術の基礎と応用　2022/11/24

  59. Global sensitivity explaining atmospheric shear layer transition

    Ryoichi Yoshimura, Aiko Yakeno, Shigeru Obayashi

    75th Annual Meeting of the Division of Fluid Dynamics　2022/11/21

  60. DNS Study of Drag Reduction Effect on Ultra-Fine Rough Surfaces

    Shingo Hamada, Aiko Yakeno, Shigeru Obayashi

    75th Annual Meeting of the Division of Fluid Dynamics　2022/11/21

  61. Flow Structure Extraction Related to the Noise Generation in A Subsonic Free Jet by Using Mode Decomposition Methods

    Shota Morita, Aiko Yakeno, Christophe Bogey, Shigeru Obayashi

    ELYT WORKSHOP 2022　2022/11/16

  62. Sensitivity Analysis to Investigate the Secondary Structure from Atmospheric Shear Flow

    Ryoichi Yoshimura, Aiko Yakeno, Benoit Pier, Frederic Alizard, Shigeru Obayashi

    ELYT WORKSHOP 2022　2022/11/16

  63. Transition Delay Effect of Ultra-Fine Surface Roughness by Aircraft Paint or Film Processing

    Yakeno, S. Hamada, S. Suzuki, M. Hattori, M. Mizutani, Y. Abe, S. Obayashi

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  64. Study on Heat Flux Prediction Method for Cartesian-Mesh CFD Under Supersonic Flows

    D. Sasaki, K. Abe, H. Moriai, S. Takahashi, G. Yamada, S. Ogawa, K. Mori, S. Obayashi, K. Shimoyama

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  65. Sonic Boom Variation of North Atlantic Supersonic Flight

    H. Yamashita, B. Kern, R. Iura, T. Ukai, T. Misaka, S. Obayashi

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  66. Numerical Analysis on the Flow Around a Flapping Wing

    Y. Okada, T. Ishide, H. Izumi, A. Harada, K. Shimoyama, S. Obayashi

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  67. Investigation on Aircraft Turbulence Using Large Eddy and Flight Simulations

    P. Schittenhelm, R. Yoshimura, J. Ito, S. Obayashi

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  68. Influence of Particle Density and Relative Position on Aerodynamic Interference Between Two Moving Particles Driven by Shock-Induced Flows

    S. Takahashi, T. Nagata, Y. Mizuno, T. Nonomura, S. Obayashi

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  69. Improvement of Aerodynamic Performance of Flying Object Clothed with Fabrics of Air Permeability Flows

    S. Asakura, H. Hasegawa, S. Obayashi, K. Nakagawa

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  70. Development Study on an Air Transportation System with a Roadable Aircraft Among Remote Islands and Major Cities Around Okinawa

    S. Morizawa, R. Sakai, R. Kikuchi, S. Obayashi

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  71. Development of Reduced Order Models for Controlling Unsteady Thermocapillary Convection

    K. Tanaka, M. Kudo, S. Obayashi

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  72. Development of a Small Birdlike High-Performance Flying Robot

    U. Kagawa, T. Arai, M. Hirano, H. Izumi, T. Ishide, K. Shimoyama, S. Obayashi

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  73. Aeroacoustic Generation and Propagation Characteristics of Annular-Wing Under WIG Effect

    C. Lai, L. Tan, Y. Zhu, S. Obayashi

    Nineteenth International Conference on Flow Dynamics　2022/11/10

  74. Modal Approach for Extracting Flow Structure Related to the Subsonic Jet Noise Generation

    S. Morita, A. Yakeno, C. Bogey, S. Obayashi

    Nineteenth International Conference on Flow Dynamics　2022/11/09

  75. Measurement of Aerodynamic Forces Acting on a Vibrating Javelin

    R. Ishiai, K. Seo, D. Tsudou, R. Sakaue, H. Okuizumi, Y. Konishi, S. Obayashi, S. Ito, M. Hiratsuka

    Nineteenth International Conference on Flow Dynamics　2022/11/09

  76. Effect of Reynolds Number on Critical Geometry of Magnetically Supported Cylinder Body

    K. Fuchigami, H. Okuizumi, S. Yokota, S. Obayashi, T. Nonomura

    Nineteenth International Conference on Flow Dynamics　2022/11/09

  77. Feasibility Study of Ammonia Fueled Supersonic Transportation

    Hajime KOSADA, Aiko YAKENO, Shigeru OBAYASHI

    The Asia-Pacific International;Symposium on Aerospace Technology(APISAT2022)　2022/10/13

  78. 超音速水素旅客機の燃料タンク配置と空力性能検討

    大久保祐汰, 焼野藍子, 大林茂, 湯原達規, 吉田憲司

    第60回飛行機シンポジウム　2022/10/12

  79. 小鳥型高性能飛行ロボットの開発

    香川詩花, 石出忠輝, 新井太一郎, 平野政輝, 泉源, 山崎渉, 下山幸治, 大林茂, 劉浩

    第60回飛行機シンポジウム　2022/10/11

  80. ２自由度を有する羽ばたき翼モデルの開発

    新井太一郎, 石出忠輝, 香川詩花, 平野政輝, 泉源, 山崎渉, 下山幸治, 大林茂, 劉浩

    第 60 回飛行機シンポジウム　2022/10/11

  81. データ同化による風洞実験デジタルツイン構築の試み

    大林 茂, 野本 京佑, 焼野 藍子, 野々村 拓

    第 60 回飛行機シンポジウム　2022/10/11

  82. Digital Transformation of Aircraft Design with Carbon Fiber Reinforced Plastics

    Yoshiaki Abe, Shigeru Obayashi

    2nd US-Japan Workshop on Data-Driven Fluid Dynamics　2022/09/06

  83. 飛行機のながれ ～航空産業のデジタルとグリーン～

    大林茂, 廣田真, 阿部圭晃

    令和4年度みやぎ県民大学 大学開放講座 東北大学流体科学研究所 ながれの科学　2022/09/02

  84. Flow Structure Analysis Related to the Acoustic Wave Generation in Subsonic Free Jet Using Dynamic Mode Decomposition

    Shota Morita, Aiko Yakeno, Christophe Bogey, Shigeru Obayashi

    WCCM-APCOM 2022(15th World Congress on Computation Mechanics & 8th Asian Pacific Congress on Computation Mechanics)　2022/07/31

  85. Ultra-fine roughness effect on transition delay using direct numerical simulation

    Shingo Hamada, Aiko Yakeno, Shigeru Obayashi

    Twelfth International Symposium on Turbulence and Shear Flow Phenomena (TSFP12)　2022/07/19

  86. Direct Global Stability of Atmospheric Shear Flow That Causes Aircraft Turbulence

    Ryoichi Yoshimura, Aiko Yakeno, Junshi Ito, Shigeru Obayashi

    Twelfth International Symposium on Turbulence and Shear Flow Phenomena (TSFP12)　2022/07/21

  87. 円柱後流のPIV計測データを⽤いたデータ同化による乱流モデルの⾼精度化

    野本京佑, 吉村僚一, 焼野藍子, 大林茂

    第54回流体力学講演会/第40回航空数値シミュレーション技術シンポジウム　2022/07/01

  88. 10年間の気象データを基にした実フラ イト上におけるソニックブームの伝播解析

    井浦玲伊, 鵜飼孝博, Hiroshi Yamashita, Bastian Kern, 三坂孝志, 大林茂

    第54回流体力学講演会/第40回航空数値シミュレーション技術シンポジウム　2022/06/30

  89. 複雑な管形状による多数の個体粒子を含む非ニュートン流体の数値流体解析

    川俣柊介, 川本裕樹, 奈良祥太朗, 野原徹雄, 高橋俊, 大林茂

    第45回日本バイオレオロジー学会年会　2022/06

  90. モード分解手法を用いた亜音速自由噴流の音響波生成に関わる流体構造の解析

    森田聖大, 焼野藍子, Christophe Bogey, 大林茂

    日本航空宇宙学会北部支部２０２２年講演会ならびに第３回再使用型宇宙輸送系シンポジウム　2022/03/18

  91. アンモニア超音速旅客機における機体成立性検討

    小佐田一, 焼野藍子, 大林茂

    日本航空宇宙学会北部支部２０２２年講演会ならびに第３回再使用型宇宙輸送系シンポジウム　2022/03/17

  92. 後退翼前縁部の境界層における受容性の三次元直接数値シミュレーション

    森悠二, 焼野藍子, 大林茂

    日本航空宇宙学会北部支部２０２２年講演会ならびに第３回再使用型宇宙輸送系シンポジウム　2022/03/17

  93. 風洞実験による分布する微小粗さの抵抗低減への影響に関する研究

    鈴木彩日、焼野藍子、大林茂

    日本航空宇宙学会北部支部２０２２年講演会ならびに第３回再使用型宇宙輸送系シンポジウム　2022/03/17

  94. 気流に平行に磁力支持された円柱の風洞閉塞効果に関する研究

    和島佑樹, 牧野麟太郎, 渕上金太郎, 奥泉寛之, 浅井圭介, 大林茂, 澤田秀夫

    日本航空宇宙学会北部支部２０２２年講演会ならびに第３回再使用型宇宙輸送系シンポジウム　2022/03/17

  95. 気流に平行に磁力支持された円柱に対するレイノルズ数の効果

    勝俣翔平, 渕上金太郎, 和島佑樹, 小澤雄太, 野々村拓, 浅井圭介, 奥泉寛之, 大林茂, 澤田秀夫

    日本航空宇宙学会北部支部２０２２年講演会ならびに第３回再使用型宇宙輸送系シンポジウム　2022/03/17

  96. Wind Tunnel Test Method Using a 1-m Magnetic Suspension and Balance System for Measuring Aerodynamic Force Acting on Rotating Sphere

    Hiroyuki Okuizumi, Hideo Sawada, Yasufumi Konishi, Shigeru Obayashi, Keisuke Asai

    The 7th International Conference on Jets, Wakes and Separated Flows 2022　2022/03/15

  97. 流体とインフォマティクス

    大林茂

    日本機械学会流体工学部門企画講習会　2022/01/19

  98. 衝撃波負荷により移動する2球体に生じる非定 常抵抗低減効果

    高橋 俊, 永田 貴之, 水野裕介, 野々村 拓, 大林 茂

    第35回数値流体力学シンポジウム（CFDシンポ）　2021/12/16

  99. データ同化流体科学のすすめ Invited

    大林茂

    第14回スーパーコンピューティング技術産業応用シンポジウム　2021/12/10

  100. Towards Ideal Aircraft-Structure Design with Carbon Fiber Reinforced Thermoplastics (CFRTPs) Invited

    Shigeru Obayashi

    ECCOMAS Thematic Workshop on Computational Multi-Physics, Multi-Disciplinary and Multi-Data – CM3 Methods and Tools for Aeronautics Design　2021/11/23

  101. フルードインフォマティクス2.0 Invited

    日本機械学会関西支部 第376回講習会（ネット配信WebEX）『実務者のための流体解析技術の基礎と応用』　2021/11/18

  102. Computational Laminar Flow Technology International-presentation Invited

    Shigeru Obayashi, Aiko Yakeno, Makoto Hirota, Yuki Ide, Naoko Tokugawa

    12th Asia-Pacific International Symposium on Aerospace Technology (APISAT 2021)　2021/11/16

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    Plenary speech

  103. 1-m磁力支持天秤装置を用いた回転する球の風洞実験法の開発

    奥泉 寛之, 澤田 秀夫, 小西 康郁, 大林 茂, 浅井 圭介

    日本機械学会 シンポジウム：スポーツ工学・ヒューマンダイナミクス2021　2021/11/15

  104. 2020年12月30日に発生した乱気流事例のasucaによるLES解析およびフライトシミュレーション

    吉村僚一, 伊藤純至, 鈴木健斗, Patrick Antonio Schittenhelm, 焼野藍子, 大林茂

    第23回非静力学モデルに関するワークショップ(NHM2021)　2021/10/28

  105. Transition delay and drag reduction mechanism by designed surface roughness

    S. Hamada, A. Yakeno, S. Suzuki, S. Obayashi, B. Nugroho

    ICFD2021　2021/10/27

  106. Sonic-boom Calculation of a Realistic North Atlantic Flight

    H. Yamashita, B. Kern, T. Ukai, R. Iura, T. Misaka, S. Obayashi

    :ICFD2021　2021/10/27

  107. Realization of a roadable aircraft to connect Okinawa’s remote island

    S. Morizawa, R. Sakai, R. Kikuchi, H. Kaneku, S. Obayashi

    ICFD2021　2021/10/27

  108. Numerical Simulation of Non-Newtonian Flow including Multiple Particles

    S. Nara, S. Kawamata, Y. Kawamoto, S. Takahashi, T. Nohara, S. Obayashi

    ICFD2021　2021/10/27

  109. Multiphase Flow Simulation of Non-Newtonian Fluids including Many Solid Particles through Corrugated Tube

    S. Kawamata, Y. Kawamoto, S. Nara, T. Nohara, S. Takahashi, S. Obayashi

    ICFD2021　2021/10/27

  110. Experimental and Computational Study on Unsteady Aerodynamic Characteristics of Heaving Corrugated Wings

    D. Sasaki, R. Naganuma, K. Mizumoto, T. Akasaka, M. Okamoto, S. Takahashi, K. Shimoyama, S. Obayashi

    ICFD2021　2021/10/27

  111. Development of a small birdlike high-performance flying robot

    T. Ishide, T. Arai, Y. Okada, H. Izumi, K. Shimoyama, S. Obayashi

    ICFD2021　2021/10/27

  112. Aerodynamic Drag Optimization of CAERI Aero Model based on P_B Experimental Design

    C. Lai, Z. Huang, S. Feng, Y. Li, Q. Yu, S. Obayashi

    ICFD2021　2021/10/27

  113. Optimization of Structural Layout for Composite Aircraft Wings

    Y. Inaba, S. Date, H. M. Alfyandy, Y. Abe, K. Shimoyama, T. Okabe, S. Obayashi

    ICFD2021　2021/10/27

  114. Measurements of Aerodynamic Characteristics of Square-Cylinder Models with Low Fineness Ratio Using 1.0-m Magnetic Suspension and Balance System

    R. Makino, Y. Wajima, M. Horiguchi, H. Okuizumi, K. Asai, S. Obayashi

    ICFD2021　2021/10/29

  115. Position Sensing Method for Rotating Sphere in 1-m Magnetic Suspension and Balance System

    H. Okuizumi, H. Sawada, Y. Konishi, S. Obayashi, K. Asai

    ICFD2021　2021/10/29

  116. Mode Decomposition Method for Extracting Characteristic Structures Related to the Subsonic Jet Noise Generation

    S. Morita, A. Yakeno, C. Bogey, S. Obayashi

    2021/10/28

  117. ものづくりに活かすデータ同化流体科学 Invited

    大林茂

    「富岳」成果創出加速プログラム 第5回HPCものづくり統合ワークショップ　2021/10/22

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    参加者数：192名 参加機関等 【内訳】 官庁・団体・研究機関 11機関 大学関係 15機関 民間企業 74社 マスコミ 1社 その他 3

  118. Study on Aerodynamic Characteristics of Flapping Wing based on a Bird’ s Structure

    2021/09/06

  119. Application of Data Assimilation to Aviation Safety Invited

    Shigeru Obayashi

    22nd International Conference on Fluid Power and Electromechanical Control Engineering (ICFPMCE)　2021/07/18

  120. ブロック構造型直交格子の抵抗計算における深層学習を用いた後流領域推定

    長橋 昌平, 夏目 雄太, 鹿田侑右, 佐々木 大輔, 松島 紀佐, 大林 茂

    第53回流体力学講演会／第39回航空宇宙数値シミュレーション技術シンポジウム　2021/07/02

  121. 複合材航空機の主翼設計における構造部材配置の最適化

    稲葉 裕太, 伊達 周吾, HARIANSYAHMuhammad Alfiyandy, 阿部圭晃, 高見 光, 下山幸治, 岡部 朋永, 大林 茂

    第53回流体力学講演会／第39回航空宇宙数値シミュレーション技術シンポジウム　2021/07/01

  122. 気象データを基にした実在大気によるソニックブームの伝播解析

    井浦 玲伊, 鵜飼 孝博, 山本 敦史, Hiroshi Yamashita, BastianKern, 三坂 孝志, 大林茂

    第53回流体力学講演会／第39回航空宇宙数値シミュレーション技術シンポジウム　2021/07/01

  123. OPTIMUM STRUCTURE DESIGN OF AIRCRAFT WINGS USING CARBON FIBER REINFORCED PLASTICS (CFRPS)

    Yoshiaki Abe, Shugo Date, Keiichi Shirasu, Hikaru Takami, Tomonaga Okabe, Shigeru Obayashi

    EUROGEN 2021(Virtual event) 14th International Conference on Evolutionary and Deterministic Methods for Design, Optimization and Control　2021/06/28

  124. Data Assimilation for Engineering Design and Operation Invited

    Shigeru Obayashi, Takashi Misaka, Aiko Yakeno, Ryota Kikuchi

    14th International Conference on Evolutionary and Deterministic Methods for Design, Optimization and Control(EUROGEN2021) (Virtual event)　2021/06/29

  125. Modal approach for extracting flow structure related to the subsonic jet noise generation

    Shota Morita, Aiko Yakeno, Christophe Bogey, Shigeru Obayashi

    ELyT Workshop 2021　2021/06/25

  126. Digital-Twin Fluid Engineering Invited

    Shigeru Obayashi, Takashi Misaka, Aiko Yakeno, Ryota Kikuchi

    The biennial International Conference on Cybernetics (CYBCONF) (Virtual Conference)　2021/06/10

  127. 【パネルディスカッション1】withコロナ社会における航空科学技術の進む道

    モデレータ, 李家, 賢一, パネリスト, 高野, 滋, 巽 重文, 大林 茂, 上野 真

    日本航空宇宙学会 第52期 年会講演会　2021/04/19

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    日本航空宇宙学会誌 Vol.69, No.9, pp.285-292, 2021.9

  128. Aerodynamic Measurements of Turbojav using 1-m Magnetic Suspension and Balance System

    Hiroyuki Okuizumi, Kasumi Sasaki, Yasufumi Konishi, Shigeru Obayashi

    AIAA SciTech Forum and Exposition (Virtual Event)　2021/01/20

  129. An Overview of MSBS Activities at Tohoku University Invited

    Shigeru Obayashi, Taku Nonomura, Keisuke Asai

    AIAA SciTech Forum and Exposition (Virtual Event)　2021/01/20

  130. Case Analysis and Large Eddy Simulation of Clear Air Turbulence Encountered over North of Tokyo, Japan, December 16, 2014

    Ryoichi Yoshimura, Kento Suzuki, Aiko Yakeno, Shigeru Obayashi, Ryota Kikuchi

    2021 AMS Annual Meeting　2021/01/15

  131. 2014年12月16日に発生した晴天乱気流事例のWRF-LESによる解析

    吉村僚一, 鈴木健斗, 焼野藍子, 大林茂, 菊地亮太, 伊藤純至

    日本気象学会 東北支部気象研究会　2020/12/07

  132. Small wavy roughness effect on T-S wave and three-dimensional transition by Direct Numerical Simulation

    Shingo Hamada, Aiko Yakeno, Shigeru Obayashi, Bagus Nugroho

    73rd Annual Meeting of the APS Division of Fluid Dynamics　2020/11/23

  133. 2014 年12 月16 日に発生した晴天乱気流事例のLES 解析

    吉村僚一, 鈴木健斗, 焼野藍子, 大林茂, 菊地亮太, 伊藤純至

    第22回 非静力学モデルに関するワークショップ　2020/11/11

  134. フルードインフォマティクス2.0 Invited

    大林茂

    日本機械学会関西支部 第370回講習会（ネット配信WebEX）『実務者のための流体解析技術の基礎と応用』　2020/11/04

  135. Prediction of Spray Field Using Data Assimilation of Schlieren Image Velocimetry

    R. Inamura, A. Yakeno, S. Obayashi, N. Watanabe, N. Kurimoto, S. Skeen

    Seventeenth International Conference on Flow Dynamics　2020/10/30

  136. Numerical Analysis of Propeller-Wing Interaction with Morphing Flap

    D. Yariwake, Y. Kamiyama, E. Dzieminska, A. Yakeno, Y. Abe, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/30

  137. Clarification of Flow Structure Using DMD for Aeroacoustics of a Subsonic Jet Related Flow Instability

    S. Morita, A. Yakeno, C. Bogey, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/30

  138. Wind-tunnel Experiment of Square-Cylinder Model in 1.0-mMagnetic Suspension and Balance System

    M. Horiguchi, Y. Saito, T. Nonomura, K. Asai, Y. Konishi, H. Okuizumi, H. Sawada, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/29

  139. Aerodynamic Characteristics of Circular Cylinders with Fineness Ratios Lower than 0.5 Measuredby a Magnetic Suspension and Balance System

    Y. Abe, S. Yokota, T. Nonomura, H. Sawada, A. Yakeno, K. Asai, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/29

  140. Ultra-fine Surface Roughness Effect on Boundary Layer Transition

    S. Hamada, A. Yakeno, B. Nugroho, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/28

  141. Study on Aerodynamic Effect of Corrugation at Low Reynolds Numbers

    D. Sasaki, R. Naganuma, T. Takase, N. Hayashi, K. Mizumoto, T. Akasaka, M. Okamoto, S. Takahashi, S. Obayashi, K. Shimoyama

    Seventeenth International Conference on Flow Dynamics　2020/10/28

  142. Sonic-boom Evaluation in Realistic Atmospheres: Introduction of the SEIRA Project

    H. Yamashita, B. Kern, S. Obayashi, T. Misaka, T. Ukai

    Seventeenth International Conference on Flow Dynamics　2020/10/28

  143. Proposal for the Transportation System with a Roadable Aircraft between Isolated Islands in Okinawa

    S. Morizawa, R. Sakai, R. Kikuchi, D. Yamabata, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/28

  144. Numerical Study on Backward-facing Step Flow Separation Control by SDBD Plasma Aerodynamic Actuation

    C. Lai, H. Fu, Z. Ling, Y. Zhou, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/28

  145. Non-newtonian Multiphase Flow Using Immersed Boundary Method

    S. Nara, Y. Kawamoto, S. Takahashi, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/28

  146. Investigations on Aerodynamic Effect of Morphing Flap and Distributed Propulsion System

    Y. Kamiyama, D. Yariwake, E. Dzieminska, A. Yakeno, Y. Abe, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/28

  147. Integrated Analysis of an Operating Jet Engine with an Airframe - A First Attempt

    K. Chiba, H. Ishikawa, Y. Oba, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/28

  148. Improvement of Aerodynamics of Objects Clothed with Air Permeable Fabrics

    Y. Kataoka, H. Hasegawa, K. Seo, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/28

  149. Development of a Small Birdlike High-performance Flying Robot

    T. Ishide, Y. Takagi, S. Otsubo, H. Izumi, K. Shimoyama, S. Obayashi

    Seventeenth International Conference on Flow Dynamics　2020/10/28

  150. 航空機設計とシミュレーション Invited

    大林茂

    武蔵野大学数理工学シンポジウム2020　2020/10/15

  151. 1A12 BOXFUN及びFaSTARによるNASA-CRMの空力解析

    野本 京佑, 焼野 藍子, 大林 茂

    流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2020オンライン　2020/09/28

  152. 実験とシミュレーションを繋ぐデータ同化の可能性

    大林茂

    実験家のためのデータ駆動科学オンラインセミナー 実験とシミュレーションを繋ぐデータ同化　2020/08/20

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    (YouTube公開)

  153. ライダ観測データ同化を用いた乱気流数値計算手法の開発

    吉村僚一, 焼野藍子, 菊地亮太, 大林茂

    JpGU - AGU Joint Meeting 2020: Virtual　2020/07/12

  154. 可視化応用 Invited

    大林茂

    公開シンポジウム 科学的知見の創出に資する可視化 (4)：「6 エリアモデルと新たな計算パラダイム」Virtual　2020/07/04

  155. Data Assimilation for Clear Air Turbulence by Upstream LIDAR Observation

    Roichi Yoshimura, Aiko Yakeno, Shigeru Obayashi, Ryota Kikuchi, Takashi Misaka

    AIAA AVIATION 2020 FORUM Virtual　2020/06/16

  156. Application of the modal decomposition technique to a subsonic jet numerical database

    Shota Morita, Aiko Yakeno, christophe bogey, Shigeru Obayashi

    ELyT Workshop 2020　2020/02/17

  157. データサイエンス設計コースセミナー設計コース

    大林茂

    一般財団法人日本科学技術連盟講習会　2020/02/14

  158. 流体とインフォマティクス

    大林茂

    日本機械学会流体工学部門企画講習会「流体とインフォマティクス」　2020/01/15

  159. Drag Coefficients of Circular Cylinders with Fineness Ratios of less than 0.50 measured by 0.1 and 0.3 m Magnetic Suspension and Balance Systems

    Masahide Kuwata, Sho Yokota, Hideo Sawada, Yoshiaki Abe, Aiko Yakeno, Taku Nonomura, Keisuke Asai, Shigeru Obayashi

    AIAA Scitech 2020 Forum　2020/01/08

  160. 航空機搭載型ライダ観測を用いたデータ同化による晴天乱気流の数値シミュレーションの研究

    吉村僚一,焼野藍子,三坂孝志,菊地亮太,岩渕秀,大林茂

    第33回数値流体力学シンポジウム　2019/11/29

  161. 数値シミュレーションを用いた羽田空港の格納庫後流中を飛行する着陸機の安全性の研究

    岩渕秀,焼野藍子,大林茂,吉村僚一,菊地亮太

    第33回数値流体力学シンポジウム　2019/11/27

  162. Multiphase Flow and Interfacial Transport Phenomena at Phase and Material Boundaries

    S. Obayashi, S. Samukawa, T. Takagi, H. Wada, T. Okada, Y. Watanabe, M. Hashimoto, T. Iijima, P. Guy, L. Udpa, Y. Hattori, H. Nagai, K. Shimoyama, M. Hirota, A. Yakeno, G. Kikugawa, A. Komiya, S. Takeda, J. Ishimoto, T. Uchimoto, H. Kosukegawa

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  163. The Stall Characteristics of Ski Jumping Suit Fabric with Different Air Permeability

    T. Takahashi, Y. Kataoka, H. Hasegawa, K. Seo, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  164. Numerical Prediction of Flow Characteristics around Moving Objects in Multiphase Flow

    S. Takahashi, Y. Mizuno, T. Nagata, Y. Kawamoto, K. Fukuda, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  165. Numerical Estimation of the Flight Range of a Gliding Mars Exploration Aircraft Based on Experimental Results

    N. Okamoto, M. Kosaka, T. Unoguchi, S. Morizawa, H. Kawazoe, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  166. Numerical Analysis of Morphing Flaps on High-lift Devices with Pneumatic Controls

    Y. Kamiyama, E. Dzieminska, S. Hanada, A. Yakeno, S. Obayashi, Y. Abe

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  167. Multi-Objective Bayesian Optimization of the Power-Law Configuration for a Low-Boom Waverider

    P. Boonjaipetch, G. A. Faza, P. S. Palar, K. Shimoyama, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  168. Fully Automated Optimum Design under an External Computer Environment

    T. Hatta, M. Sawahara, K. Chiba, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  169. Experimental Study for Identifying the Singular Point in Airfoil Wakes Dominated by the Global Instability

    S. Takagi, Y. Konishi, H. Okuizumi, A. Inasawa, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  170. Experimental Feasibility Study on a V/STOL Aircraft with Upper Surface Blowing

    T. Okumura, M. Inoue, K. Sakamoto, H. Kawazoe, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  171. Experimental and Numerical Study on Unsteady Aerodynamic Characteristics

    D. Sasaki, T. Akasaka, M. Okamoto, K. Ouchi, Y. Shikada, Y. Yamaguchi, S. Fukatsu, A. Shirakawa, H. Oshima, S. Obayashi, K. Shimoyama

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  172. Effect on Wing Grid for the Aerodynamic Design

    S. Morizawa, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  173. Development of Numerical Method for Clear Air Turbulence by Using LIDAR Data Assimilation

    Ryoichi Yoshimura,Aiko Yakeno,Shigeru Obayashi,Takashi Misaka,Ryota Kikuchi,Shu Iwabuchi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  174. Comparison of Data Assimilation Methods in Fluid Problems

    T. Misaka, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  175. Attachment-lineReceptivity around aSwept Wing by DirectNumerical Simulation

    A. Yakeno,S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  176. Aerodynamic Drag Reduction using a Coating Material in Flapping Wing

    T. Ishide, Y. Takagi, S. Otsubo, T. Kaeriyama, K. Shimoyama, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  177. Aerodynamic Drag Reduction of a Heavy Truck with Efficient Global Optimization Method

    C. Lai, W. Huang, Q. Wang, Y. Zhou, S. Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/07

  178. Numerical Investigation of Aircraft Safety Landing in the Hangar Wake at Haneda Airport

    Shu Iwabuchi, Ryoichi Yoshimura, Aiko Yakeno, Shigeru Obayashi, Ryota Kikuchi

    Sixteenth International Conference on Fluid Dynamics　2019/11/06

  179. Influence of Small Wavy Roughness on a Flat Plate Boundary Layer Transition

    Hiroki Tameike, Aiko Yakeno, Shigeru Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/06

  180. Flow Dynamics of Low Fineness Ratio Circular Cylinders Evaluated by IFS 0.1-m MSBS and Large-Eddy Simulation

    Masahide Kuwata, Aiko Yakeno, Yoshiaki Abe, Shigeru Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/06

  181. A Force Evaluation Test of 5-Axis Controlled Model at High Angles of Attack in 1-m Magnetic Suspension and Balance System

    Kasumi Sasaki,Yasuhumi Konishi,Hiroyuki Okuizumi,Shigeru Obayashi

    Sixteenth International Conference on Fluid Dynamics　2019/11/06

  182. 磁力支持天秤装置を用いたターボジャブの空力特性計測

    佐々木 香澄,小西 康郁,奥泉 寛之,大林 茂

    日本機械学会 シンポジウム： スポーツ工学・ヒューマンダイナミクス2019　2019/10/25

  183. 平板上の異なる波長を有する微小波状粗さの境界層遷移への影響

    溜池啓輝, 焼野藍子, 大林茂

    第51回流体力学講演会/第37回航空宇宙数値シミュレーション技術シンポジウム　2019/07/02

  184. 日本でのAir Taxi事業の経済性と技術課題及び運用方法について

    桑田 政英, 小林 翔吾, 佐々木 香澄, 吉村 僚一, 溜池 啓輝, 岩渕 秀, 佐藤 良雄, 大林 茂

    日本航空宇宙学会第50期 定時社員総会および年会講演会　2019/04/18

  185. Real-Time Prediction of Wind and Atmospheric Turbulence Using Aircraft Flight Data

    Ryota Kikuchi, Takashi Misaka, Shigeru Obayashi

    ICCES2019　2019/03/25

  186. Prediction of rubber friction on wet and dry rough surfaces using flow structure coupling simulation

    Takayoshi Kubota, Yusuke Mizuno, Shun Takahashi, Ryota Asa, Reina Sagara, Yuji Kodama, Shigeru Obayashi

    ICCES2019　2019/03/25

  187. Flow-Structure Coupled Simulation of Particle-Structure collision using Immersed Boundary Method and Finite Element Method

    Yusuke Mizuno, Takayoshi Kubota, Shun Takahashi, Kota Fukuda, Shigeru Obayashi

    ICCES2019　2019/03/25

  188. Data-Driven Estimation and Control of Flow Fields in Engineering Applications

    Shigeru Obayashi, Aiko Yakeno

    ICCES2019　2019/03/25

  189. 翼面吹き出し制御によるデルタ翼の離着陸空力性能の向上

    福地 亮太, 下山 幸治, 大林 茂

    日本航空宇宙学会北部支部2019年講演会 ならびに第20回再使用型宇宙推進系シンポジウム　2019/03/20

  190. IFS 0.1-m 磁力支持天秤装置を用いた低細長比鈍頭物体用位置計測法の開発

    桑田 政英, 澤田 秀夫, 大林 茂

    日本航空宇宙学会北部支部2019年講演会 ならびに第20回再使用型宇宙推進系シンポジウム　2019/03/20

  191. 1-m 磁力支持天秤装置を用いた高迎角時5軸力評価法の実証試験

    佐々木 香澄, 小西 康郁, 奥泉 寛之, 大林 茂

    日本航空宇宙学会北部支部2019年講演会 ならびに第20回再使用型宇宙推進系シンポジウム　2019/03/20

  192. 1-m 磁力支持天秤装置による非定常空力特性の取得に向けた研究

    大山 尚悟, 奥泉 寛之, 小西 康郁, 澤田 秀夫, 大林 茂

    日本航空宇宙学会北部支部2019年講演会 ならびに第20回再使用型宇宙推進系シンポジウム　2019/03/20

  193. 弾道飛行装置を用いた超音速自由飛行カプセル模型の空気力学計測手法に関する研究

    越本崇仁, 内海宏輝, 大谷清伸, 大林茂

    平成30年度衝撃波シンポジウム　2019/03/05

  194. CFDと多目的設計探査及びデータ同化の融合

    大林茂

    鹿島建設㈱技術研究所講演会　2019/01/24

  195. 流体とインフォマティクス

    大林茂

    日本機械学会 流体工学部門企画講習会「流体とインフォマティクス」　2019/01/16

  196. インフォマティクスが拓く新たなCFD技術の可能性

    大林茂

    公益社団法人自動車技術会 CFD技術部門委員会 公開委員会　2019/01/11

  197. 観測感度情報を用いた局所気象データ同化における観測地点の検討

    吉村 僚一, 三坂 孝志, 大林茂, 中村 昌道, 焼野 藍子

    日本機械学会 第31回計算力学講演会（CMD2018)　2018/11/23

  198. A Data Assimilation Application to Computational Crowd Dynamics Simulation

    F. Togashi, T. Misaka, R. L&#1255, hner, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/18

  199. Supersonic drag reduction model using repetitive pulse laser energy deposition

    A. Iwakawa, A. Sasoh, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  200. Probabilistic Tsunami Inundation Hazard Map via Uncertainty Quantification Approaches

    W. Yamazaki, T. Kato, K. Shimoyama, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  201. Optimum Design of Nonplanar Wings for Minimum Induced Drag at Low Reynolds Number

    K. Tokura, S. Morizawa, H. Kawazoe, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  202. Numerical Prediction of Flow Characteristics around Moving Objects in Multiphase Flow

    Y. Mizuno, Y. Kawamoto, S. Takahashi, K. Fukuda, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  203. Numerical Investigation of Geometrical Corrugation Influence to Vortex Flowfields at low-Reynolds Number

    Y. Yamaguchi, D. Sasaki, M. Okamoto, K. Shimoyama, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  204. Multiscale Flow and Interfacial Transport Phenomena at Phase and Material Boundaries

    S. Obayashi, S. Samukawa, T. Takagi, H. Wada, Y. Watanabe, M. Hashimoto, T. Iijima, P. Guy, L. Udpa, Y. Hattori, H. Nagai, K. Shimoyama, M. Hirota, A. Yakeno, G. Kikugawa, A. Komiya, T. Okada, J. Ishimoto, T. Uchimoto, H. Kosukegawa

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  205. Fully Automatic Design Optimization System for Flyback Booster Considered From Subsonic to Hypersonic Range

    T. Sumimoto, K. Chiba, M. Kanazaki, T. Fujikawa, K. Yonemoto, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  206. Flowfield reconstruction from surface pressure using data assimilation method

    J. Cho, T. Misaka, S. Obayashi, K. Yee, S. Jeong

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  207. Feasibility Study on a V/S-TOL Aircraft with Upper Surface Blowing

    S. Nishimura, T. Okumura, K. Sakamoto, S. Morizawa, H. Kawazoe, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  208. Experimental and Numerical Investigation of Flow Phenomena Associated with Low-Reynolds Number Flow

    D. Sasaki, T. Miwa, Y. Yamaguchi, Y. Natsume, T. Iwafune, R. Fujii, T. Akasaka, M. Okamoto, S. Takahashi, T. Misaka, S. Obayashi, K. Shimoyama

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  209. Comparison of Data Assimilation Methods in Fluid Problems

    T. Misaka, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  210. Collaborative Optimization of Vehicle Low Aerodynamic Drag and Noise Reduction

    C. Lai, H. Zhang, B. Zhao, Y. Zhou, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  211. CFD Study on a Wing Grid for Improvement of Aerodynamic Characteristics

    S. Morizawa, K. Tokura, H. Kawazoe, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  212. Attitude Control of a Supersonic Projectile by Pulsation of Bow Shock

    T. Mizukaki, K. Ohtani, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  213. Aerodynamic Evaluation of Ski Jumping Suit Fabric - Effect of Different Air Permeability on Aerodynamic Performances -

    R. Maeta, T. Takahashi, H. Hasegawa, K. Seo, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  214. Aerodynamic drag reduction using a coating material in flapping wing

    T. Ishide, M. Kimura, R. Fujii, T. Kaeriyama, K. Shimoyama, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/08

  215. Near-Field PressureMeasurement of a modelSuspended by MagneticForce in SupersonicWind TunnelT

    T. Kawagoshi, H. Sawada, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/07

  216. Multiscale andMultiphysics Modelingfor Aircraft Design

    S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/07

  217. Feasibility of DynamicStability MeasurementsUsing 1-m MagneticSuspension and BalanceSystemS

    S. Oyama, H. Okuizumi, Y. Konishi, H. Sawada, S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/07

  218. A New Model PositionSensing Method for aSmall Fineness RatioBluff Body at the IFS0.1-m MSBSM

    M. Kuwata,S. Obayashi

    Fifteenth International Conference on Flow Dynamics　2018/11/07

  219. フルードインフォマティクス2.0

    大林茂

    日本機械学会関西支部 第358回講習会 実務者のための流体解析技術の基礎と応用　2018/10/30

  220. 計算知能と工学設計（多目的設計探査の考え方）

    大林茂

    サイエンティフィック・システム研究会SS研HPCフォーラム2018　2018/08/28

  221. Numerical Investigation of Shock/Film-Cooling Interaction

    Kazuki Ozawa, Shigeru Obayashi, Simon Loosen, Marian Albers, Pascal Meysonnat, Matthias Meinke, Wolfgang Schroeder

    ICCFD 2018　2018/07/12

  222. 高速度連続画像を用いた超音速自由飛行模型の抵抗係数計測法

    大谷 清伸, 川上 遼兼, 越本 崇仁, 小川 俊広, 大林 茂

    第50回流体力学講演会／第36回航空宇宙数値シミュレーション技術シンポジウム　2018/07/06

  223. 「環境適合超音速機実用研究会」設置について

    金崎 雅博, 高谷 亮太, 牧野 好和, 大林茂, 佐宗 章弘

    第50回流体力学講演会／第36回航空宇宙数値シミュレーション技術シンポジウム　2018/07/06

  224. 後方乱気流のダイナミクス－発生・崩壊と大気乱れの影響－

    三坂 孝志, 大林 茂, ホルツァプフェル フランク

    第50回流体力学講演会／第36回航空宇宙数値シミュレーション技術シンポジウム　2018/07/04

  225. リアルタイムデータ同化を用いた乱気流回避経路の生成

    菊地 亮太, 三坂 孝志, 大林 茂

    第50回流体力学講演会／第36回航空宇宙数値シミュレーション技術シンポジウム　2018/07/04

  226. フィルム冷却流れ場の衝撃波入射角度による影響

    小澤 一輝, 大林 茂(東北大), ローゼン ジィーモン, アルバーツ マリアン, メゾナント パスカル, メインケ マティアス, ジョルダー ヴォルファン(アーヘン工科大)

    第50回流体力学講演会／第36回航空宇宙数値シミュレーション技術シンポジウム　2018/07/04

  227. コルゲート翼における凹凸が空力性能に与える影響の数値解析

    山口 裕也, 岡本 正人, 佐々木 大輔, 下山 幸治, 大林 茂

    第50回流体力学講演会／第36回航空宇宙数値シミュレーション技術シンポジウム　2018/07/04

  228. BCMを用いた30P30Nの2次元空力予測

    小島 貴哉,三坂 孝志,焼野 藍子,大林 茂,鹿田 侑右,岩船 翼,佐々木 大輔

    第50回流体力学講演会／第36回航空宇宙数値シミュレーション技術シンポジウム　2018/07/04

  229. 多目的設計探査とその応用

    大林茂

    ものづくり企業に役立つ応用数理手法の研究会　2018/06/07

  230. Impact of Haneda Hangar Wake on Landing Aircraft and Wake Vortices

    大林茂,三坂孝志

    日本地球惑星科学連合2018年大会　2018/05/22

  231. A New Direction of Engineering Simulation Driven by Data Assimilation

    大林茂,三坂孝志

    日本地球惑星科学連合2018年大会　2018/05/22

  232. WRF-3DVARデータ同化および観測地点感度解析を用いた風力発電所における高精度風況予測

    吉村僚一,大林茂,三坂孝志,中村昌道

    2018年度春季気象学会　2018/05/17

  233. 通期量パッチワークスキージャンプスーツに関する研究

    川端 鷹亮,長谷川裕晃, 村上 正秀,瀬尾和哉,大林茂

    日本機械学会関東支部 第 24 期総会・講演会　2018/03/17

  234. バドミントシャルコックの反転挙動

    沖 大善, 長谷川 裕晃,村上 正秀,大林 茂

    日本機械学会関東支部 第 24 期総会・講演会　2018/03/17

  235. 磁力支持天秤装置を用いた気流軸周りの90度回転への試み

    佐々木香澄, 澤田秀夫, 大林茂, 小西康郁, 奥泉寛之, 仙田裕紀, 大山尚悟

    日本航空宇宙学会北部支部 2018 年講演会ならびに第 19 回再使用型宇宙推進系シンポジウム　2018/03/06

  236. 羽田空港の格納庫後流に発生する乱気流の流体解析

    山口晃毅, 菊地亮太, 三坂孝志, 大林茂

    日本航空宇宙学会北部支部 2018 年講演会ならびに第 19 回再使用型宇宙推進系シンポジウム　2018/03/06

  237. IFS0.1ｍ磁力支持天秤装置を用いた有翼模型の超音速風洞試験法

    田中一成,川越崇己,澤田秀夫,大林茂

    平成29年度衝撃波シンポジウム　2018/03/06

  238. IFS 1-m磁力支持天秤装置における高迎角時5軸力評価法について

    仙田裕紀, 奥泉寛之, 澤田秀夫, 小西康郁, 大林茂

    日本航空宇宙学会北部支部 2018 年講演会ならびに第 19 回再使用型宇宙推進系シンポジウム　2018/03/06

  239. IFS 1-m 磁力支持天秤装置における高迎角時運動制御法について

    仙田裕紀, 奥泉寛之, 澤田秀夫, 小西康郁, 大林茂

    日本航空宇宙学会北部支部 2018 年講演会ならびに第 19 回再使用型宇宙推進系シンポジウム　2018/03/06

  240. IFS0.1ｍ磁力支持天秤装置を用いた有翼模型による超音速風洞試験法の開発

    田中一成,川越崇己,澤田秀夫,大林茂

    日本航空宇宙学会北部支部 2018 年講演会ならびに第 19 回再使用型宇宙推進系シンポジウム　2018/03/05

  241. Aerodynamic Analysis of NASA Common Research Model by Block - Structured Cartesian Mesh

    Shinya Makino, Takaya Kojima, Takashi Misaka, Shigeru Obayashi, Daisuke Sasaki

    2018 AIAA Aero space Science Meeting American Institute of Aeronautics and Astronautics SciTech Forum　2018/01/09

  242. Aerodynamic Measurements of AGARD-B Model at High Angles of Attack by 1-m Magnetic Suspension and Balance System

    Hiroki Senda, Hideo Sawada, Hiroyuki Okuizumi, Yasufumi Konishi, Shigeru Obayashi

    2018 AIAA Aero space Science Meeting American Institute of Aeronautics and Astronautics SciTech Forum　2018/01/08

  243. Tohoku University’s Electric Car for Student Formula Japan International-presentation

    Workshop on Next Generation Transport Aircraft　2013/03/29

  244. Knowledge Extraction for Structural Design of Regional Jet Horizontal Tail using Multi-Objective Design Exploration (MODE) International-presentation

    7th International Conference on Evolutionary Multi-Criterion Optimization　2013/03/22

  245. 車両モデル周り流れの計測融合シミュレーション

    日本航空宇宙学会北部支部2013年講演会　2013/03/15

  246. 固有直交分解と粒子フィルタを用いた低層風擾乱の流れ場推定

    日本航空宇宙学会北部支部2013年講演会　2013/03/14

  247. 弾道飛行装置を用いた低ソニックブーム実証実験のための計測技術に関する研究

    平成24年度衝撃波シンポジウム　2013/03/14

  248. 高翼形態におけるフェアリング形状の空力最適化

    日本航空宇宙学会北部支部2013年講演会　2013/03/14

  249. Toward Large-Scale Design Optimization Based on Building-Cube Method International-presentation

    International Workshop on Uncertainty Quantification and Design Optimization　2013/02/25

  250. 空港周辺で発生する低層風擾乱の高解像度気象解析

    第７回航空気象研究会　2013/01/31

  251. Evaluation of the Tube-and-Wing Configuration Varieties for Near-Future Fuel Efficient Transonic Transports with the Advanced Aero Engines International-presentation

    51st Aerospace Sciences Meeting　2013/01/10

  252. P GUI-based Geometry Deformation Tool for Modification of Aircraft Configurations International-presentation

    51st Aerospace Sciences Meeting　2013/01/09

  253. Wake Evolution of High-Lift Configuration from Roll-Up to Vortex Decay International-presentation

    51st Aerospace Sciences Meeting　2013/01/08

  254. Numerical Analysis of Clear Air Turbulence by Using Large Eddy Simulation Coupled with a Meteorological Model International-presentation

    51st Aerospace Sciences Meeting　2013/01/08

  255. Parametric Study of Vortex Generators on a Super Critical Infinite-Wing with Shock-Induced Separation International-presentation

    51st Aerospace Sciences Meeting　2013/01/07

  256. 非構造格子CFDソルバーを用 いたフィルム冷却翼の解析

    第26回数値流体力学シンポジウム　2012/12/19

  257. 埋め込み境界型壁面モデルを用いた直交格子積み上げ法による流体解析

    第26回数値流体力学シンポジウム　2012/12/18

  258. Updating Kriging Response Surface Models Based on the Hypervolume Indicator in Multi-Objective Optimization(多目的最適化におけるHypervolume Indicatorに基づくKriging応答曲面モデルの更新)

    Workshop on multi-objective design exploration for real-world design optimization problems 2012　2012/12/17

  259. Aerodynamic Optimization Using Building Cube Method and Data mining with Proper Orthogonal Decomposition International-presentation

    The 6th International Conference on Soft Computing and Intelligent Systems, The 13th International Symposium on Advanced Intelligent Systems　2012/11/24

  260. Laser ablation at the hydrodynamic regime International-presentation

    Experimental fluid mechanics 2012　2012/11/21

  261. Review of background oriented schlieren and development for ballistic range applications International-presentation

    Experimental fluid mechanics 2012　2012/11/21

  262. 未来の超音速旅客機「MISORA」～航空機開発の歴史と展望

    民間航空発祥の地稲毛100周年記念講演会　2012/11/18

  263. Axis Calibration Test Results for 85mm Magnetic φ Suspension and Balance System International-presentation

    2012 Asia-Pacific International Symposium on Aerospace Technology (APISAT-2012)　2012/11/13

  264. 遷音速翼の衝撃失速緩和に向けたボルテックス・ジェネレータのCFD解析

    第50回 飛行機シンポジウム　2012/11/05

  265. 新型エンジン搭載次世代航空機としてのエンジン4発形態の妥当性評価

    第50回 飛行機シンポジウム　2012/11/05

  266. Investigation of Data Exploration Method for Thermal-Fluid Simulation Results Using Proper Orthogonal Decomposition International-presentation

    JSME-CMD ICMS2012　2012/10/09

  267. Toward the Development of Measurement Integrated Simulation International-presentation

    Integration2012　2012/10/04

  268. Sensitivity Analysis of Unsteady Flow Fields and Numerical Experiments for Optimal Measurement International-presentation

    Integration2012　2012/10/04

  269. Assessment of some experimental and processing factors for background oriented schlieren measurements International-presentation

    Integration2012　2012/10/03

  270. Aerodynamic Characteristics of a Delta Wing with the Arc Camber for Mars Exploration International-presentation

    Integration2012　2012/10/03

  271. ESTIMATION OF NOISE SHIELDING EFFECT OF NEXT-GENERATION AIRCRAFT BY A COMPUTATIONAL AEROACOUSTICS METHOD International-presentation

    ICAS2012　2012/09/26

  272. Assessment of Supersonic Free-flight Experiment using a Plate Shaped Sabot Aimed at the Biplane Model International-presentation

    Ninth International Conference on Flow Dynamics　2012/09/21

  273. High Aerodynamic Drag and Flow Behavior of a Badminton Shuttlecock with Spin at High Reynolds Numbers International-presentation

    Ninth International Conference on Flow Dynamics　2012/09/20

  274. Quantitative Visualization of Flow Field around High-Speed Projectiles by Using Background-Oriented Schlieren International-presentation

    Ninth International Conference on Flow Dynamics　2012/09/20

  275. Numerical Investigations on the Influence of Rear Spoiler of Road Vehicle on Wake Structure International-presentation

    Ninth International Conference on Flow Dynamics　2012/09/20

  276. Shock Tube Study for Electron Behavior in the Shock Layer International-presentation

    Ninth International Conference on Flow Dynamics　2012/09/20

  277. Shock Induced Temperature Measurement Using Laser-Induced Thermal Acoustics International-presentation

    Ninth International Conference on Flow Dynamics　2012/09/20

  278. Aerodynamic Performance of an Airfoil with VGJs for Lift Augmentation International-presentation

    Ninth International Conference on Flow Dynamics　2012/09/20

  279. Development of a Compact Three-Component Force Balance and Its Application International-presentation

    Ninth International Conference on Flow Dynamics　2012/09/20

  280. Optimization of a turbulence model by using data assimilation International-presentation

    European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)　2012/09/12

  281. SOURCE OF ACOUSTICWAVES FROM A SUPERSONIC JET IMPINGING ON AN INCLINED FLAT PLATE WITH VARIOUS PLATE ANGLE International-presentation

    European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS 2012)　2012/09/10

  282. Time‐resolved shock wave visualization using a pointdiffraction interferemeter International-presentation

    20th International Shock Interaction Symposium　2012/08/23

  283. Effect of Shock Wave Reflection and Diffraction for Near-Field Pressure Measurement of Supersonic Projectile using Ballistic Range International-presentation

    20th International Shock Interaction Symposium　2012/08/22

  284. 衝撃波に及ぼす熱粘性，緩和および乱流による相互作用効果の評価に向けて

    グローバルCOE航空宇宙流体科学サマースクール2012　2012/08/08

  285. 高精度コンパクト差分法を用いた晴天乱気流の気象解析

    グローバルCOE航空宇宙流体科学サマースクール2012　2012/08/08

  286. 強制ロール振動するデルタ翼の動的風洞試験に向けた非定常シミュレーション

    グローバルCOE航空宇宙流体科学サマースクール2012　2012/08/07

  287. データ同化の基礎+α

    グローバルCOE航空宇宙流体科学サマースクール2012　2012/08/07

  288. BCM圧縮性Eulerソルバーを用いた空力最適化の研究

    グローバルCOE航空宇宙流体科学サマースクール2012　2012/08/07

  289. 遷音速翼の衝撃失速緩和に向けたボルテックス・ジェネレータの数値解析

    グローバルCOE航空宇宙流体科学サマースクール2012　2012/08/07

  290. 点回折干渉計法による衝撃波の定量計測

    グローバルCOE航空宇宙流体科学サマースクール2012　2012/08/06

  291. INVESTIGATION OF A DATA MINING METHOD FOR THERMAL-FLUID SIMULATION RESULTS BASED ON PRESSURE DIFFERENCE BETWEEN FRONT AND BACK SIDES USING MEDIAL-SURFACE AND ITS APPLICATION TO THERMAL DESIGN PROBLEMS International-presentation

    10th World Congress on Computational Mechanics　2012/07/11

  292. Global Variation of Sonic Boom Overpressure Due to Seasonal Changes in Atmosphere International-presentation

    Hiroshi Yamashita, Shigeru Obayashi

    The 19th International Symposium on Nonlinear Acoustics　2012/05/21

  293. Approach for Uncertainty of Turbulence Modeling Based on Data Assimilation Technique International-presentation

    International Workshop on Future of CFD and Aerospace Sciences　2012/04/23

  294. 弾道飛行装置を用いた超音速飛行体の近傍場圧力計測における衝撃波反射と回折の影響

    鵜飼孝博, 大谷清伸, 大林茂

    平成23年度衝撃波シンポジウム　2012/03/07

  295. データ同化による乱流モデルの最適化

    加藤博司

    第５回EFD/CFD融合ワークショップ　2012/01/23

  296. データ同化を利用した乱流の適応型シミュレーション

    加藤 博司, 大林 茂, 橋本 敦, 吉澤徴, 上野玄太, 樋口知之

    第25回数値流体力学シンポジウム　2011/12/19

  297. Development of Measuring Technique on Near-Field Pressure for Supersonic Projectiles Using Ballistic Range International-presentation

    Takahiro Ukai, Kiyonobu Ohtani, Takamasa Kikuchi, Shigeru Obayashi

    Eighth International Conference on Flow Dynamics　2011/11/11

  298. Expansion Wave and Bubble Generation by Underwater Micro Explosion International-presentation

    Kiyonobu Ohtani, Toshihiro Ogawa, Shigeru Obayashi

    Eighth International Conference on Flow Dynamics　2011/11/11

  299. Sonic Boom Analysis Considering Multiple Atmospheric Uncertainties Using a Polynomial Chaos Method International-presentation

    Daichi Ono, Atsushi Hashimoto, Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    Eighth International Conference on Flow Dynamics　2011/11/11

  300. Aerodynamic Characteristics of a Badminton Shuttlecock at High Reynolds Numbers International-presentation

    Seigo Kitta, Hiroaki Hasegawa, Masahide Murakami, Shigeru Obayashi

    Eighth International Conference on Flow Dynamics　2011/11/10

  301. Development of Background Oriented Schlieren for Supersonic Flow Over Inclined Plane International-presentation

    Ardian B. Gojani, Toshiharu Mizukaki, Toshihiro Ogawa, Kiyonobu Ohtani, Takamasa Kikuchi, Takuya Yoneyama, Shigeru Obayashi

    Eighth International Conference on Flow Dynamics　2011/11/10

  302. Development of Force Balance for Its Application to a Silent Supersonic Biplane Model in the Low Speed Wind Tunnel International-presentation

    Hiromitsu Kawazoe, Hiroshi Suemura, Gouji Yamada, Takashi Matsuno, Shigeru Obayashi

    Eighth International Conference on Flow Dynamics　2011/11/10

  303. Effect of Electron Behavior in front of Shock Wave on Thermo-Chemical Process behind the Shock Wave International-presentation

    Gouji Yamada, Shota Ago, Shingo Otsuta, Takashi Matsuno, Hiromitsu Kawazoe, Shigeru Obayashi

    Eighth International Conference on Flow Dynamics　2011/11/10

  304. Experimental Studies of Sonic Boom Using a Two-stage Light Gas Gun International-presentation

    Kazuaki Hatanaka, Tsutomu Saito, Kiyonobu Ohtani, Toshihiro Ogawa, Shigeru Obayashi, Masahide Katayama

    Eighth International Conference on Flow Dynamics　2011/11/10

  305. Numerical Simulation of the Aerodynamic Characteristics on a Detailed Motorcycle International-presentation

    Chenguang Lai, Shigeru Obayashi, Yuting Zhou, Haibin Xing

    Eighth International Conference on Flow Dynamics　2011/11/10

  306. Quantitative Visualization by using Background-Oriented Schieren International-presentation

    Toshiharu Mizukaki, Ardian Gojani, Shigeru Obayashi

    Eighth International Conference on Flow Dynamics　2011/11/10

  307. Shock Induced Temperature Measurement using Laser-Induced Thermal Acoustics International-presentation

    Toshiharu Mizukaki, Shigeru Obayashi

    Eighth International Conference on Flow Dynamics　2011/11/10

  308. Validation study on computational aeroacoustics of acoustics waves from sub-scale rocket plume International-presentation

    Seiichiro Morizawa, Taku NOnomura, Seiji Tsutsumi, NObuhiro Yamanishi, Keita Terashima, Shigeru Obayashi, Kozo Fuji

    162nd Meeting Acoustical Society of America　2011/11/09

  309. 大気温度の不確定性を考慮したソニックブーム解析手法の開発

    小野大地

    第49回飛行機シンポジウム　2011/10/27

  310. 超音速飛行する模型表面と衝撃波の同時可視化手法の確立

    鵜飼 孝博

    第49回飛行機シンポジウム　2011/10/27

  311. BOS法による複葉よ翼から発生する圧力波の可視化

    米山 拓也

    第49回飛行機シンポジウム　2011/10/26

  312. 気象予測データを融合した後方乱気流解析へのTwo-way Nesting手法の適用

    中名生大樹

    第49回飛行機シンポジウム　2011/10/26

  313. 晴天乱気流予測に向けたメソ数値シミュレーションに対するデータマイニング

    森本 敬太

    第49回飛行機シンポジウム　2011/10/26

  314. An Identical Twin Experiment for the Development of FaSTAR with an Ensemble Kalman Filter International-presentation

    Hiroshi Kato, Shigeru Obayashi

    The 6th SNU-Tohoku University Joint Workshop on Next Generation Aero Vehicle　2011/10/14

  315. Sonic Boom Analysis Considering Multiple Atmospheric Uncertainties Using a Polynomial Chaos Method International-presentation

    Daichi Ono, Atsushi Hashimoto, Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    The 6th SNU-Tohoku University Joint Workshop on Next Generation Aero Vehicle　2011/10/14

  316. Backgroud Oriented Schlieren: Principle, Review of Applications, and Development for Ballistic Range Measurements International-presentation

    Ardian B. Gojani, Shigeru Obayashi

    The 6th SNU-Tohoku University Joint Workshop on Next Generation Aero Vehicle　2011/10/13

  317. Evaluation of Shock Wave above Pressure Instrument for Supersonic Spherical Projectile Using Ballistic Range International-presentation

    Takahiro Ukai, Kiyonobu Ohtani, Shigeru Obayashi

    The 6th SNU-Tohoku University Joint Workshop on Next Generation Aero Vehicle　2011/10/13

  318. Study on Laboratory-scale Shock Wave phenomena by Micro-gram Explosive detonation International-presentation

    Kiyonobu Ohtani, Toshihiro Ogawa, Shigeru Obayashi, Kazuyoshi Takayama

    The 6th SNU-Tohoku University Joint Workshop on Next Generation Aero Vehicle　2011/10/13

  319. アンサンブルカルマンフィルタによるFaSTARデータ同化実験

    加藤 博司, 大林 茂, 橋本 敦

    日本機械学会第24回計算力学講演会（CMD2011）　2011/10/09

  320. Applications of Multi-Objective Design Exploration (MODE) to a Regional Jet Design International-presentation

    2011 KAIST, TIT, Tohoku University and HIT Joint Workshop on Multidisciplinary Design Problems　2011/10/06

  321. Visualization of Pressure Wave Form Biplane using BOS Method International-presentation

    Takuya Yoneyama

    2011 KAIST, TIT, Tohoku University and HIT Joint Workshop on Multidisciplinary Design Problems　2011/10/06

  322. Wake Turbulence Simulation Integrated with Weather Prediction Data Using Two-way Nesting Method International-presentation

    Hiroki Nakanomyo

    2011 KAIST, TIT, Tohoku University and HIT Joint Workshop on Multidisciplinary Design Problems　2011/10/06

  323. Multidisciplinary Design Exploration Applied to Supersonic Aircraft International-presentation

    Shigeru Obayashi, Kazuhisa Chiba

    EUROGEN2011　2011/09/16

  324. Data Mining for Performance Map Construction in Centrifugal Diffuser Design International-presentation

    Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi, Kazuyuki Sugimura

    EUROGEN 2011: Evolutionary and Deterministic Methods for Design, Optimization and Control with Applications to Industrial and Societal Problems　2011/09/16

  325. Multi-Objective Design Exploration (MODE) Applied to a Regional Jet Design International-presentation

    Shigeru Obayashi, Hiroyuki Morino

    EUROGEN2011　2011/09/14

  326. シャトルコック羽根付け根部隙間が引起す高い減速特性

    橘田征吾, 長谷川裕晃, 村上正秀, 大林茂

    日本流体力学会年会2011　2011/09/08

  327. Aerodynamic properties of a shuttlecock with spin at high Reynolds number International-presentation

    Seigo Kitta, Hiroaki Hasegawa, Masahide Murakami, Shigeru Obayashi

    5th Asia-Pacific Congress on Spots Technology　2011/08/29

  328. SUPERSONIC WIND TUNNEL EXPERIMENT ON AERODYNAMIC CHARACTERISTICS AND WINGLETS EFFECTS OF THE TAPERED SUPERSONIC BIPLANE International-presentation

    ASME-JSME-KSME Joint Fluids Engineering Conference 2011　2011/07/28

  329. 中立面を活用した物体表裏面圧力差評価に基づく流体解析結果のデータマイニング手法の検討と冷却実装問題への適用

    磯島宣之, 小野寺誠, 大林茂

    第39回可視化情報シンポジウム　2011/07/18

  330. 中立面を活用した物体表裏面圧力差評価に基づく流体解析結果のデータマイニング手法の検討と冷却実装問題への適用

    磯島宣之, 小野寺誠, 大林茂

    第39回可視化情報シンポジウム　2011/07/08

  331. Hybrid wind tunnel based on ensemble Kalman filter International-presentation

    Kato H, Obayashi S

    Fusion 2011 - 14th International Conference on Information Fusion　2011/07/06

  332. Kriging/RBF-Hybrid Response Surface Method for Highly Nonlinear Functions International-presentation

    Nobuo Namura, Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    CEC2011　2011/06/08

  333. MULTIOBJECTIVE TEST PROBLEMS FOR AEROSPACE DESIGN OPTIMIZATION International-presentation

    ECCOMAS thematic conference CFD & OPTIMIZATION　2011/05/24

  334. 超音速複葉翼を用いた航空機の主翼重量評価

    宮内空野, 山下博, 鄭信圭, 大林茂

    日本航空宇宙学会北部支部2011年講演会　2011/03/10

  335. アンサンブルカルマンフィルタの角柱風洞実験への適用

    加藤博司, 大林茂

    第60回理論応用力学講演会　2011/03/08

  336. Data Mining for performance map construction in multi-objective turbomachinery design International-presentation

    Workshop on Multi-Disciplinary Multi-Objective Optimisation　2011/02/23

  337. 日本におけるEFD/CFD融合の方向性, パネリスト

    第４回EFD/CFD融合ワークショップ　2011/01/25

  338. アンサンブルカルマンフィルターによるハイブリッド風洞の試み

    大林茂, 加藤博司

    平成22年度航空宇宙空力班シンポジウム「航空宇宙工学における空気力学の挑戦2011」　2011/01/22

  339. 飛行機の歴史と原理

    空気力学研究会　2011/01/13

  340. 航空機の設計と数理モデル

    第８回現象数理若手シンポジウム　2011/01/12

  341. Calculation of Unsteady Control Surface Aerodynamics using Reduced-Order Models International-presentation

    Kentaro Nakai, Koji Shimoyama, Shigeru Obayashi, Hiroyuki Morino, Hitoshi Yamaguchi

    49th AIAA Aerospace Sciences Meeting　2011/01/05

  342. Data Mining for the Investigation of Unsteady Flow Field in a Hard Disk Drive International-presentation

    NaBIC2010　2010/12/15

  343. 日本の航空科学技術の研究ポテンシャルについて(Research Potential of Japanese Programme)

    J-BILAT第五回セミナー(J-BILAT 5th seminar)　2010/11/11

  344. Atmospheric Absorption Effect on Sonic Boom Waveform during Its Propagation International-presentation

    The Seventh International Conference on Flow Dynamics　2010/11/03

  345. Integration of Experiment and Numerical Simulation based on Ensemble Kalman Filter International-presentation

    The Seventh International Conference on Flow Dynamics　2010/11/03

  346. Physics Mining for Unsteady Flow Field in a Hard Disk Drive International-presentation

    The Seventh International Conference on Flow Dynamics　2010/11/03

  347. Rotor Blade Shape Design Using MDO Platform-MEDOC International-presentation

    The Seventh International Conference on Flow Dynamics　2010/11/03

  348. Supersonic Biplane Wing Design and Optimization International-presentation

    The Seventh International Conference on Flow Dynamics　2010/11/03

  349. Computations of Flow around an Object Decelerating from Supersonic to Subsonic Velocity International-presentation

    The Seventh International Conference on Flow Dynamics(AFI/TFI-2010)　2010/11/02

  350. Drag Crisis of a Hard Baseball International-presentation

    The Seventh International Conference on Flow Dynamics(AFI/TFI-2010)　2010/11/02

  351. Low Boom Characteristic of Supersonic Biplane with Sears-Haack Fuselage International-presentation

    The Seventh International Conference on Flow Dynamics(AFI/TFI-2010)　2010/11/02

  352. Shuttlecock Aerodynamics and Dynamic Behavior Just after Impact International-presentation

    The Seventh International Conference on Flow Dynamics(AFI/TFI-2010)　2010/11/02

  353. Simulations of Unsteady Flow around Tandem Cylinders Using Building-Cube Method International-presentation

    The Seventh International Conference on Flow Dynamics　2010/11/02

  354. Unsteady Aerodynamics of a Supersonic Silent Biplane at Low Speed Flight International-presentation

    The Seventh International Conference on Flow Dynamics(AFI/TFI-2010)　2010/11/02

  355. Influence of Vehicle Rear Shape on Aerodynamic Performance and Wake Structure International-presentation

    The Seventh International Conference on Flow Dynamics　2010/11/01

  356. Numerical Investigation of Unsteady Flow Field around a Sphere Decelerating at Transonic Speed International-presentation

    The Seventh International Conference on Flow Dynamics　2010/11/01

  357. 航空機搭載型ドップラーライダーにおけるガウス分布を用いた信号処理

    日本機械学会第88期流体工学部門講演会　2010/10/31

  358. 仙台空港における後方乱気流シミュレーション

    日本機械学会第88期流体工学部門講演会　2010/10/31

  359. 低速における超音速複葉翼型基本形状の空力特性に関する研究

    日本機械学会第88期流体工学部門講演会　2010/10/31

  360. Multidisciplinary design optimization of a three-dimensional supersonic biplane based on method of characteristics International-presentation

    27th Congress of the International Council of the Aeronautical Sciences　2010/09/20

  361. データマイニングによる遠心ディフューザのための多次元性能マップ構築

    日本機械学会2010年度年次大会　2010/09

  362. Data Mining for the Advection Database of Wake Vortices International-presentation

    2nd AIAA Atmospheric and Space Environments Conference　2010/08/03

  363. ソニックブーム最小化を考慮した機体設計における超音速複葉翼の有用性

    グローバルCOE航空宇宙流体科学サマースクール　2010/08/02

  364. 超音速複葉翼有用性の実験的検証

    グローバルCOE航空宇宙流体科学サマースクール　2010/08/02

  365. 航空CFDへのデータ同化の適用－後方乱気流への適用例と次世代動的風洞開発に向けて－

    第1回データ同化セミナー　2010/07/15

  366. Material Design Optimization for a Sport Shoe Sole by Evolutionary Computation and FEM Analysis International-presentation

    2010 IEEE Congress on Evolutionary Computation　2010/07

  367. Design of Supersonic Biplane Aircraft Conceming Sonic Boom Minimization International-presentation

    28th AIAA Applied Aerodynamics Conference　2010/06/30

  368. ソニックブーム最小化を考慮した機体設計における超音速複葉翼の有用性

    第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010　2010/06/25

  369. ソニックブーム波形に対する大気の吸音減衰効果

    第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010　2010/06/25

  370. 気象予測モデルとCFDとのマルチワンウェイネスティングによる後方乱気流シミュレーション

    第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010　2010/06/25

  371. 計算と実験による翼胴型超音速複葉翼機のソニックブーム低減化に関する研究

    第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010　2010/06/25

  372. 多目的問題のためのExpected Improvement評価手法の開発

    第42回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2010　2010/06/24

  373. Advantage of Supersonic Biplane for Aircraft Design Concerning Sonic Boom Minimization International-presentation

    The 5th Tohoku University-Seoul National University Joint Workshop on Next Generation Aero Vehicle　2010/06/17

  374. Evaluation of Advection and Decay Process for Wake Vortices Based on Meteorological Factors International-presentation

    The 5th Tohoku University-Seoul National University Joint Workshop on Next Generation Aero Vehicle　2010/06/17

  375. 大動脈瘤内における非定常血流に関する情報探査

    第15回計算工学講演会　2010/05/26

  376. Visual Data Mining for Unsteady Blood Flow Field International-presentation

    22nd International Conference on Parallel Computational Fluid Dynamics 2010　2010/05/17

  377. 気象因子から得られる後方乱気流の移流・減衰評価に関する取り組み

    日本航空宇宙学会第41期年会講演会　2010/04/15

  378. Investigation of the Bed and Rear Flap Variation for a Low-Drag Pickup Truck using Design of Experiments International-presentation

    2010 SAE World Congress　2010/04/13

  379. Visualization and Knowledge Mining in Multidisciplinary Design Space International-presentation

    Integrated Multiphysics Simulation & Optimization: Database Workshop II for multiphysics optimization software validation　2010/03/10

  380. バリスティックレンジによる超音速自由飛行実験のための翼胴型複葉翼模型の研究

    日本航空宇宙学会北部支部2010年講演会ならびに第11回再使用型宇宙輸送系シンポジウム　2010/03/10

  381. 仙台空港ライダを利用した後方乱気流に関するこれまでの取り組みと今後について

    ダウンスケール研究会　2010/03/10

  382. 超音速複葉翼の空力中心に関する評価

    日本航空宇宙学会北部支部2010年講演会ならびに第11回再使用型宇宙輸送系シンポジウム　2010/03/10

  383. Measurement of Aircraft Wake Vortices Using Doppler 1.5 micron LIDAR International-presentation

    WAKENET-3 Europe / GREENWAKE DEDICATED WORKSHOP ON WAKE VORTEX & WIND MONITORING SENSORS IN ALL WEATHER CONDITIONS　2010/03

  384. 長距離人力飛行機研究調査について

    平成21年度科研費空力班シンポジウム　2010/01/22

  385. Global Variation of Sonic Boom Intensity Due to Seasonal Atmospheric Gradients International-presentation

    48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition　2010/01/07

  386. Ballistic Range Experiment on the Low Sonic Boom Characteristics of Supersonic Biplane International-presentation

    48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition　2010/01/06

  387. Global Variation of Sonic Boom Intensity Due to Seasonal Atmospheric Gradients International-presentation

    Hiroshi Yamashita, Shigeru Obayashi

    48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition　2010/01/04

  388. Ballistic Range Experiment on the Low Sonic Boom Characteristics of Supersonic Biplane International-presentation

    A. Toyoda, M. Okubo, S. Obayashi, K. Shimizu, A. Matsuda, A. Sasoh

    48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition　2010/01/04

  389. 感圧塗料を用いたデーパ型超音速複葉翼の設計点周りにおける翼表面圧力計測

    藤園 崇, 山下 博, 長い大樹, 大林 茂, 浅井圭介

    平成21年度宇宙航行の力学シンポジウム　2009/12/10

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    発表日：11日

  390. Computations of Unsteady Flow Field around an Accelerationg Sphere in the Transonic Flow Velocity Region International-presentation

    Kazuaki Hatanaka, Tsutomu Saito, Hiroshi Yamashita, Toshihiro Ogawa, Shigeru Obayashi, Kazuyoshi Takayama

    The 9th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration　2009/11/04

  391. Global Sonic Boom Overpressure Variation under Realistic Meteorological Condition International-presentation

    Hiroshi Yamashita, Shigeru Obayashi

    The 9th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration　2009/11/04

  392. Numerical and Experimental Analysis on Shock Wave Interaction of the Supersonic Biplane Model International-presentation

    Atsushi Toyoda, Masayuki Okubo, Shigeru Obayashi, Katsuya Shimizu, Atsushi Matsuda and, Akihiro Sasoh

    The 9th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration　2009/11/04

  393. Investigation of Aerodynamic Performance due to Automotive Engine-cooling Exit Flow International-presentation

    Chen-Guang Lai, Yasuaki Kohama, Shigeru Obayashi, Shinkyu Jeong

    The 9th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration　2009/11/04

  394. Numerical Simulations of Flow Field Around an Object Decelerating from Supersonic to Subsonic Velocity International-presentation

    Kazuaki Hatanaka, Tsutomu Saito, Hiroshi Yamashita, Toshihiro Ogawa, Shigeru Obayashi, Kazuyoshi Takayama

    The 9th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration　2009/11/04

  395. Meteorological Influence on Sonic Boom International-presentation

    Hiroshi Yamashita, Shinkyu Jeong, Shigeru Obayashi

    The 9th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration　2009/11/04

  396. Investigation of the Rear Flap Configuration of a Pickup Truck using Design of Experiments International-presentation

    Jongsoo Ha, Shinkyu Jeong, Shigeru Obayashi

    The 9th International Symposium on Advanced Fluid Information and Transdisciplinary Fluid Integration　2009/11/04

  397. ブーゼマン複葉翼を用いた低速飛行模型の開発

    宮内空野, 豊田篤, 山下博, 鄭信圭, 大林茂

    第47回飛行機シンポジウム　2009/11/04

  398. 空力弾性解析における縮約モデル構築方法に関する研究

    中井賢太郎

    第47回飛行機シンポジウム　2009/11/04

  399. ヘリコプタのHSI騒音低減と性能向上を目的としたブレード平面形

    佐々木亮, 鄭信圭, 蔡相賢, 李管中, 青山剛史

    第47回飛行機シンポジウム　2009/11/04

  400. 水平尾翼を用いた後端ブーム低減化

    石垣真之, 山下 博, 鄭 信圭, 大林 茂

    第47回飛行機シンポジウム　2009/11/04

  401. 進化的計算によるスポーツ用シューズソールの材料物性最適設計

    下山幸治, 瀬尾和哉, 西脇剛史, 鄭信圭, 大林茂

    人工知能学会第2回進化計算フロンティア研究会　2009/10/03

  402. Flow Characteristics of a Pickup Truck according to the Bed Geometry International-presentation

    Jongsoo Ha, Shinkyu Jeong, Yasuaki Kohama, Shigeru Obayashi

    The 4th SNU – TU Joint Workshop on Next Generation Aero Vehicle　2009/09/28

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    発表日：28日

  403. Influence of the layout of engine-cooling outlet on automotive aerodynamic performance International-presentation

    Chen-Guang Lai, Shigeru Obayashi, Yasuaki Kohama, Shinkyu Jeong

    The 4th SNU – TU Joint Workshop on Next Generation Aero Vehicle　2009/09/28

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    発表日：28日

  404. 磁気ディスク装置における非定常流れ場の流体情報 探査

    森澤 征一郎, 下山 幸治, 鄭 信圭, 大林 茂

    日本機械学会 2009年度年次大会　2009/09/14

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    発表日：9 月14 日(月)

  405. 設計の見える化

    日本機械学会2009年度年次大会　2009/09/14

  406. Drag Characteristics of a Pickup Truck According to the Bed Geometry International-presentation

    Jongsoo Ha, Shigeru Obayashi, Yasuaki Kohama

    The 7th IASME/WSEAS Int.Conf.on Fluid Mechanics and Aerodynamics　2009/08/20

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    発表日：8月21日

  407. 次世代設計理論・多目的設計探査の考え方と国産旅客機MRJへの応用

    大林茂

    第14回関東CAE懇話会　2009/08/07

  408. Multi-Objective Design Exploration (MODE) - Visualization and Mapping of Design Space International-presentation

    Machine Learning for Aerospace International Workshop　2009/07/03

  409. Advection Database of Wake Vortices at Sendai Airport Based on Lidar Measurement International-presentation

    Hiroshi Kato, Takashi Misaka, Shigeru Obayashi, Izumi Yamada

    1st AIAA Atmospheric and Space Environments Conference　2009/06/22

  410. 気象観測とCFD を利用した後方乱気流シミュレー ション

    加藤博司, 大林茂, 東北大流, 三坂孝志, 山田泉, 電, 奥野善則(JA

    第41回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム2009　2009/06/18

  411. ３次元超音速複葉翼の空力中心に関する研究

    金山靖信, 米澤誠仁, 山下博, 大林茂

    第41回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム2009　2009/06/18

  412. 正方形管断面バリスティックレンジを用いた低ソニック ブーム飛行体の自由飛行実験

    清水克也, 松田淳, 佐宗章弘, 豊田篤, 大林茂

    第41回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム2009　2009/06/18

  413. Multi-Objective Design Optimization for a Steam Turbine Stator Blade Using LES International-presentation

    Koji Shimoyama, Shu Yoshimizu, Shinkyu Jeong, Shigeru Obayashi, Yasuyuki Yokono

    EUROGEN 2009: Evolutionary and Deterministic Methods for Design, Optimization and Control with Applications to Industrial and Societal Problems　2009/06/15

  414. 4次元変分法とCFDによる後方乱気流予測に向けた取り組み

    加藤博司, 大林 茂, 三坂孝志, ドイツ航空宇宙センター, 山田 泉, 奥野善則

    第58回理論応用力学講演会（NCTAM2009）　2009/06/09

  415. 次世代設計理論・多目的設計探査の考え方と国産旅客機MRJへの応用

    第14回関東CAE懇話会　2009/05/29

  416. 宇宙航空におけるEMOの動向

    大林茂

    第１回進化計算フロンティア研究会(SIG-ECF)　2009/05/29

  417. Kriging-model-based Multi-objective Robust Optimization and Trade-off-rule Mining Using Association Rule with Aspiration Vector International-presentation

    Shigeru Obayashi

    2009 IEEE Congress on Evolutionary Computation, Nova Conference Centre and Cinema　2009/05/18

  418. MRJに適用された設計探査の考え方

    大林茂

    第12回東北CAE懇話会　2009/04/10

  419. 超音速複葉翼の始動過程に対する3次元性の影響

    藤園崇, 大山創史, 永井大樹, 大林茂, 浅井圭介

    航空宇宙学会北部支部 2009年講演会　2009/03/11

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    東北大学片平キャンパスさくらホール

  420. バリスティックレンジを用いたフリーフライト実験のための複葉翼実験模型形状の研究

    大久保正幸, 豊田篤, 大林茂

    航空宇宙学会北部支部 2009年講演会　2009/03/11

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    東北大学片平キャンパスさくらホール

  421. 実大気環境を考慮した後方乱気流予測技術

    加藤博司, 三坂孝志, 大林茂, 山田泉, 奥野善則

    航空宇宙学会北部支部 2009年講演会　2009/03/11

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    東北大学片平キャンパスさくらホール

  422. 蒸気タービン静翼形状設計最適化

    吉清水宗, 下山幸治, 鄭信圭, 大林茂, 横野泰之

    航空宇宙学会北部支部 2009年講演会　2009/03/11

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    東北大学片平キャンパスさくらホール

  423. 実大気環境を考慮した後方乱気流予測技術

    加藤博司, 三坂孝志, 大林茂, 山田泉, 奥野善則

    第2回EFD/CFD融合ワークショップ　2009/02/23

  424. Application of Crossflow Transition Criteria to Local Correlation-Based Transition Model International-presentation

    Yuto Watanabe, Takashi Misaka, Shigeru Obayashi

    47th AIAA Aerospace Sciences Meeting and exhibit　2009/01/05

  425. ハイブリッド最適化手法を用いたディーゼルエンジン燃焼室形状の最適化

    長谷川翔一, 下山幸治, 鄭信圭, 大林茂

    進化計算シンポジウム 2008　2008/12/20

  426. Physics Data Mining for Three-Dimensional Unsteady Blood Flow Field in an Aneurysmal Aorta International-presentation

    Seiichiro MORIZAWA, Koji SHIMOYAMA, Shigeru OBAYASHI, Kenichi FUNAMOTO, Toshiyuki HAYASE

    Proceedings of the 8th International Symposium on Advanced Fluid Information and the 4th International Symposium on Transdisciplinary Fluid Integration　2008/12/19

  427. 20年前の計算から-圧縮性でもＩＬＥＳ？

    第22回数値流体力学シンポジウム　2008/12/17

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    桑原先生追悼セッション

  428. 最適解探索能力向上に向けた翼型形状表現方法に関する検討

    吉清水宗, 下山幸治, 鄭信圭, 大林茂, 横野泰之

    第８回最適化シンポジウム2008 (OPTIS 2008)　2008/11/27

  429. Unstructured Mesh based simulation for Subsoinc and Supersonic Flow Control with a Plasma Actuator International-presentation

    Junya Yamamoto, Koji Shimoyama, Shinkyu Jeong, Shingeru Obayashi, Takashi Matsuno, Hirmitsu Kawazoe

    Proceedings of 2008 KSAS-JSASS Joint International Symposium on Aerospace Engineering　2008/11/20

  430. Clear Air Turbulence Detection with Neural Networks International-presentation

    Fabio K. Nakabayashi, Takashi Misaka, Shigeru Obayashi, Hisamichi Tanaka, Hamaki Inokuchi

    Proceedings of 2008 KSAS-JSASS Joint International Symposium on Aerospace Engineering　2008/11/20

  431. Low-speed Wake Analysis of Supersonic Biplane International-presentation

    Shuichi Ozaki, Masahito Yonezawa, Naoshi Kuratani, Toshihiro Ogawa, Shigeru Obayashi, Takashi Matsuno, Hromitsu Kawazoe

    Proceedings of 2008 KSAS-JSASS Joint International Symposium on Aerospace Engineering　2008/11/20

  432. Sonic Boom Propagation with Atmospheric Fluctuations of Wind and Temperature International-presentation

    H. Yamashita, S. Obayashi

    The Fifth International Conference on Flow Dynamics　2008/11/17

  433. Automatic Detection Algorithm of Wake Vortices Considering Decay Process International-presentation

    Hiroshi Kato, Takashi Misaka, Shigeru Obayashi, I. Yamada, Y. Okuno

    The Fifth International Conference on Flow Dynamics　2008/11/17

  434. 双発型超音速ビジネスジェットの設計におけるソニックブーム予測精度の検証

    石垣真之, 熊野孝保, 山下博, 米澤誠仁, 鄭信圭, 大林茂

    第46回飛行機シンポジウム　2008/10/22

  435. 超音速複葉翼における低速空力特性解析

    尾崎修一, 米澤誠仁, 倉谷尚志, 小川俊弘, 大林茂, 松野隆, 川添博光

    第46回飛行機シンポジウム　2008/10/22

  436. 計測融合シミュレーションを用いたノイズ有りライダーデータ処理のためのフィルタ設計

    ナカバヤシファビオコウイチ, 三坂孝志, 大林茂, 田中久理, 井之口浜木

    第46回飛行機シンポジウム　2008/10/22

  437. COMPARISON OF SHOCK WAVE INTERACTION FOR THE THREE-DIMENSIONAL SUPERSONIC BIPLANE WITH DIFFERENT PLANAR SHAPES M. Yonezawa, H. Yamashita International-presentation

    M. Yonezawa, H. Yamashita

    The 26th Congress of theInternational Council of Aeronautical Sciences Including the 8th AIAA Aircraft Technology, Integraaaation, and Operations Confererence　2008/09/14

  438. Low-Boom and Low-Drag Optimization of the Twin-Engine Silent Supersonic Technology Demonstrator International-presentation

    Kumano, T, Sato, K, Yoneezawa, M, Yamashita, H, Jeong, S, Obayashi, S

    The 26th Congress of theInternational Council of Aeronautical Sciences Including the 8th AIAA Aircraft Technology, Integraaaation, and Operations Confererence　2008/09/14

  439. 離陸航空機の後流渦のライダ計測融合シミュレーション

    三坂孝志, 大林茂, 山田泉, 奥野善則

    日本機械学会 2008年度年次大会　2008/08/04

  440. Efficient Robust Optimization Framework for Real-World Engineering Design International-presentation

    Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi

    5th European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS 2008　2008/06/30

  441. Aeroelastic Analysis using Unstructured CFD Method for Realistic Aircraft Design International-presentation

    Takayasu Kumano, Hiroyuki Morino, Shinkyu Jeong, Shigeru Obayashi

    5th European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS 2008　2008/06/30

  442. Multi-Objective Design Optimization for Stator Blade Configuration of Steam Turbine International-presentation

    Shu Yoshimizu, Koji Shimoyama, Shinkyu Jeong, Shigeru Obayashi, Yasuyuki Yokono

    5th European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS 2008　2008/06/30

  443. Multi-Objective Design Exploration (MODE) - Visualization of Design Space and Knowledge Mining International-presentation

    Shigeru Obayashi, Shinkyu Jeong, Takayasu Kumano

    5th European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS 2008　2008/06/30

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    keynote lecture

  444. Low-Boom and Low-Drag Design Exploration for Twin Engine Supersonic Business Jet International-presentation

    Shinkyu Jeong, Koma Sato, Takayasu Kumano, Shigeru Obayashi

    5th European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS 2008　2008/06/30

  445. Integrated Simulation of Wake Trubulence using Lidar Measurement International-presentation

    Takashi Misaka, Takeshi Ogasawara, Shigeru Obayashi, Izumi Yamada, Yoshinori Okuno

    5th European Congress on Computational Methods in Applied Sciences and Engineering ECCOMAS 2008　2008/06/30

  446. γ-Reθ遷移モデルの検証と横流れ不安定のモデル化に関す る検討

    渡辺悠人, 三坂孝志, 大林茂, 加藤琢真, 斎木佑一郎, 有馬敏幸, 山口義博

    第40回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム2008　2008/06/12

  447. プラズマアクチュエータ流体制御の非構造格子数値解析手法の開発

    山本潤弥, 下山幸治, 鄭信圭, 大林茂

    第40回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム2008　2008/06/12

  448. CFD解析を基にした超音速複葉翼の抵抗要素検討

    米澤誠仁, 大林茂

    第40回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム2008　2008/06/12

  449. ソニックブーム伝播における大気擾乱効果

    山下博, 大林茂

    第40回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム2008　2008/06/12

  450. ライダ計測とCFDを融合した後方乱気流のシミュレーション

    三坂孝志, 大林茂, 山田泉, 奥野善則

    第40回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム2008　2008/06/12

  451. Multi-objective Robust Design Optimization and Knowledge Mining of a Centrifugal Fan that Takes Dimensional Uncertainty into Account International-presentation

    Sugimura, K, Jeong, S, Obayashi, S, Kimura, T

    ASME TurboEXPO 2008　2008/06/12

  452. GA/PSOハイブリッド最適化手法における大域的・局所的探索能力の同時改善に向けた研究

    長谷川翔一, 下山幸治, 鄭 信圭

    第13回計算工学講演会　2008/05/19

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    座長：大林茂

  453. 大型スクリーンを用いた仙台空港における後方乱気流の視覚解析

    大林茂, 三坂孝志, 小笠原健, 藤代一成, 竹島由里子

    第13回計算工学講演会　2008/05/19

  454. 製造業での製品適用事例（家電品のファン空力性能の最適設計事例）

    杉村和之, 大林茂, 鄭信圭

    TECHNO-FRONTIER 2008 第８回熱設計・対策技術シンポジウム　2008/04/16

  455. 超音速複葉翼の衝撃波干渉流れに関する可視化研究

    大山 創史, 永井 大樹, 倉谷 尚志, 小川 俊広, 浅井 圭介

    平成19年度衝撃波シンポジウム　2008/03/17

  456. 超音速複葉翼間の衝撃波干渉に及ぼすアスペクト比の影響

    倉谷 尚志, 米澤 誠仁, 山下 博, 小川 俊広, 大林 茂

    日本航空宇宙学会北部支部2008年講演会・第9回再使用型宇宙推進系シンポジウム　2008/03/10

  457. 低速時における高揚力装置付き超音速複葉翼の空力性能

    尾崎 修一, 米澤 誠仁, 倉谷 尚志, 大林 茂

    日本航空宇宙学会北部支部2008年講演会ならびに第9回再使用型宇宙推進系シンポジウム　2008/03/10

  458. Measurement-Integrated Simulation of Wake Turbulence International-presentation

    Takashi Misaka, Takeshi Ogasawara, Shigeru Obayashi, Izumi Yamada, Yoshinori Okuno

    46th AIAA Aerospace Sciences Meeting and Exhibit　2008/01/07

  459. 多目的最適化と設計探査

    大林茂

    第21回数値流体力学シンポジウム　2007/12/19

  460. 航空機実用設計に向けた非構造CFD空弾解析ツールの開発

    熊野孝保, 森野裕行, 大林茂

    第21回数値流体力学シンポジウム　2007/12/19

  461. 超音速複葉翼間における衝撃波干渉と相殺現象の可視化

    倉谷尚志, 永井大樹, 浅井圭介, 小川俊広, 大林茂

    平成19年度宇宙航行の力学シンポジウム　2007/12/17

  462. Measurement of Aircraft Wake Vortices Using Doppler LIDAR International-presentation

    Takeshi Ogasawara, Takashi Misaka, Toshihiro Ogawa, Shigeru Obayashi, Izumi Yamada

    The Fourth International Conference on Flow Dynamics　2007/12/14

  463. Lidar Data Assimilation Experiment for Wake Turbulence International-presentation

    Takashi Misaka, Takeshi Ogasawara, Shigeru Obayashi, Izumi Yamada, Yoshinori Okuno

    The Fourth International Conference on Flow Dynamics　2007/12/14

  464. Development and Application of a New Robust Optimization Framework for Real-World Engineering Design International-presentation

    Shimoyama, K, Jeong, S, Obayashi, S, Koishi, M

    Proceedings of the 7th International Symposium on Advanced Fluid Information and the 4th International Symposium on Transdisciplinary Fluid Integration　2007/12/14

  465. Low-Boom and Low-Drag Optimization of the Twin Engine Version of Silent Supersonic Business Jet International-presentation

    Koma Sato, Takayasu Kumano, Masahito Yonezawa, Hiroshi Yamashita, Shinkyu Jeong, Shigeru Obayashi

    The Fourth International Conference on Flow Dynamics　2007/12/14

  466. Multi-Objective Design Exploration(MODE)for Wing-Nacelle Configuration for Transonic Regional Jet International-presentation

    Takayasu Kumano

    KAIST, TIT, Tohoku University, and HIT Joint Workshop, on Multidisciplinary Design Problems　2007/12/07

  467. Three-Dimensional Effects on Shock Wave Interaction for Supersonic Biplane International-presentation

    Masahito Yonezawa

    KAIST, TIT, Tohoku University, and HIT Joint Workshop, on Multidisciplinary Design Problems　2007/12/07

  468. Design Exploration of Low-Boom and Low-Drag Configuration for Supersonic Business Jet International-presentation

    Shigeru Obayashi

    KAIST, TIT, Tohoku University, and HIT Joint Workshop, on Multidisciplinary Design Problems　2007/12/07

  469. Multidisciplinary Design Optimization for Regional Jet Wing with Engine Nacelle International-presentation

    Kumano T, Jeong S, Obayashi S, Ito Y, Hatanaka K, Morino H

    The Asian-Pacific Association for Computational Mechanics　2007/12/03

  470. 周辺大気状態が翼端渦に及ぼす影響

    小笠原健, 三坂孝志, 小川俊広, 大林茂, 山田泉

    第45回飛行機シンポジウム　2007/10/10

  471. 後方乱気流シミュレーションへのライダ計測融合手法に関する検討

    三坂 孝志, 小笠原 健, 大林 茂, 山田 泉, 奥野 善則

    第45回飛行機シンポジウム　2007/10/10

  472. Effects of Leading- and Trailing-edge Flaps on Low-Speed Aerodynamic Performance of Supersonic Biplane International-presentation

    N. Kuratani, T. Ogawa, S. Ozaki, S. Obayashi, S. Abe, T. Matsuno, H.Kawazoe

    第21回飛行機シンポジウム国際セッション 2007 JSASS-KSAS Joint International Symposium on Aerospace Engineering　2007/10/10

  473. MRJへの多目的最適化の応用

    熊野孝保, 鄭信圭, 大林茂, 森野裕行

    第45回飛行機シンポジウム　2007/10/10

  474. 多目的最適化とロバスト設計

    下山幸治, 鄭信圭, 大林茂

    第45回飛行機シンポジウム　2007/10/10

  475. 静粛超音速研究機双発案の低ブーム低抵抗最適化

    佐藤孝磨, 熊野孝保, 米澤誠仁, 山下博, 鄭信圭, 大林茂, 大貫武, 村上哲

    第45回飛行機シンポジウム　2007/10/10

  476. Aerodynamic Performance of Supersonic Biplane for Sonic-Boom Reduction International-presentation

    Naoshi Kuratani, Toshihiro Ogawa, Masahito Yonezawa, Hiroshi Yamashita, Shigeru Obayashi

    The Fourth International Conference on Flow Dynamics　2007/09/26

  477. Numerical Study on the Asymmetric Propagation of Near-field Pressure Waves for Sonic Boom Reduction International-presentation

    H. YAMASHITA, M. YONEZAWA, S. OBAYASHI

    The Fourth International Conference on Flow Dynamics　2007/09/26

  478. An Approach for Multi-Objective Robust Optimization Assisted by Response Surface Approximation and Visual Data-Mining, International-presentation

    Koji Shimoyama, Jin Ne Lim, Shinkyu Jeong, Shigeru Obayashi, Masataka Koishi

    2007 IEEE Congress on Evolutionary Computation　2007/09/25

  479. 遠心ファンの最適設計データベースに対する設計知識マイニング手法の適用

    杉村和之, 大林茂, 鄭信圭

    日本機械学会2007年度年次大会　2007/09/09

  480. ターボ機械の多目的設計探査

    杉村和之, 岩瀬幸司, 下山幸治, 大林茂, 鄭信圭

    日本機械学会2007年度年次大会　2007/09/09

  481. Multi-objective Design Exploration of a Centrifugal Impeller Accompanied with a Vaned Diffuser International-presentation

    Kazuyuki Sugimura, Shigeru Obayashi, Shinkyu Jeong

    5th Joint ASME/JSME Fluid Engineering Conference　2007/07/30

  482. Experimental and Numerical Study on Aerodynamic Characteristics of Supersonic Biplane in Whole Speed Range International-presentation

    Naoshi Kuratani, Toshihiro Ogawa, Masahito Yonezawa, Hiroshi Yamashita, Shigeru Obayashi

    2ND EUROPEAN CONFERENCE FOR AEROSPACE SCIENCES (EUCASS)　2007/07/02

  483. An Application of Local Correlation-Based Transition Model to JAXA High-Lift Configuration Model International-presentation

    Atsushi Toyoda, Takashi Misaka, Shigeru Obayashi

    25th AIAA Applied Aerodynamics Conference　2007/06/25

  484. Improvement in the low-speed aerodynamiv performance of supersonic biplane with high-lift devices International-presentation

    Naoshi Kuratani, Toshihiro Ogawa, Masahito Yonezawa, Hiroshi Yamashita, Shuuichi Ozaki, Shigeru Obayashi

    The 2nd SNU-TU Joint Workshop on Next Generation Aero Vehicle　2007/06/18

  485. Stochastic Wind Shear Prediction Model for Clear Air Turbulence International-presentation

    Takashi Misaka, Shigeru Obayashi, Eiichi Endo

    The 2nd SNU-TU Joint Workshop on Next Generation Aero Vehicle　2007/06/18

  486. A Framework of Efficient Multi-Objective Robust Optimization for Real-World Engineering Design International-presentation

    Koji Shimoyama, Jin Ne Lim, Shinkyu Jeong, Shigeru Obayashi, Masataka Koishi

    The 2nd SNU-TU Joint Workshop on Next Generation Aero Vehicle　2007/06/18

  487. 低ブーム胴体形状に関する研究

    山下博, 米澤誠仁, 大林茂

    第39回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム　2007/06/14

  488. ソニックブーム低減用複葉翼間の衝撃波干渉と相殺

    倉谷尚志, 小川俊広, 米澤誠仁, 山下博, 大林茂

    第39回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム　2007/06/14

  489. 低速域における複葉翼の空力特性と流れ特性

    尾崎修一, 米澤誠仁, 倉谷尚志, 小川俊広, 鄭信圭, 大林茂, 松野隆, 川添博光

    第39回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム　2007/06/14

  490. JAXA高揚力装置風洞模型への境界層遷移モデルの適用

    三坂孝志, 豊田篤, 大林茂

    第39回流体力学講演会／航空宇宙数値シミュレーション技術シンポジウム　2007/06/14

  491. Application of Kriging-Based Optimization Method to Lifting-Body Type Reentry Vehicle Design International-presentation

    Jeong Shinkyu, Suzuki Kunihiro, Obayashi Shigru

    EUROGEN2007　2007/06/11

  492. 遠心ブロアの最適設計データベースに対する決定木とラフ集合の適用

    杉村和之, 大林茂, 鄭信圭

    日本機械学会計算力学部門複合領域における設計探査研究会　2007/06/08

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    Multidisciplinary Design Exploration (MDE) Lecture Series 2

  493. Efficcienr Design Exploration of Aircraft International-presentation

    Kumano T, Jeong S, Obayashi S, Ito Y, Hatanaka K, Morino H

    Lectures and Workshop International Recent Advances in Multidisciplinary Technology and Modeling　2007/05/23

  494. Large Eddy Simulation of Wake Turbulence with Integrating Lidar Measurements International-presentation

    Takashi Misaka, Takeshi Ogasawara, Shigeru Obayashi, Izumi Yamada, Yoshinori Okuno

    International Conference on Parallel Computational Fluid Dynamics　2007/05/21

  495. Experimental and Computational Fluid Dynamics around Supersonic Biplane for Sonic-Boom Reduction International-presentation

    Naoshi Kuratani, Toshihiro Ogawa, Hiroshi Yamashita, Masahito Yonezawa, Shigeru Obayashi

    13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference)　2007/05/21

  496. Improvement of Nonlinear Lateral Characteristics of Lifting-Body Type Reentry Vehicle Using Optimization Algorithm International-presentation

    Shinkyu Jeong, Kunihiro Suzuki, Shigeru Obayashi

    AIAA Infotech@Aerospace2007 Coference and Exhibit　2007/05/07

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    AIAA paper 2007-2893

  497. Design Representation and the Shape of the Pareto Front in Evolutionary Multiobjective Structural Design International-presentation

    R. Kicinger, T. Arciszewski, S. Obayashi

    AIAA Infotech@Aerospace2007 Conference and Exhibit　2007/05/07

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    AIAA-2007-2889

  498. Airfoil Shape Optimization by Minimization of an Expensive and Discontinuous Black- box Function International-presentation

    Y. Tenne, S. Obayashi, S. Armfield

    AIAA Infotech@Aerospace2007 Conference and Exhibit　2007/05/07

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    AIAA-2007-2874

  499. Optimisation of Stents for Aneurysm International-presentation

    K. Srinivas, M Ohta, T. Nakayama, S. Obayashi, T. Yamaguchi

    The 4th International Intracranial Stent Meeting (ICS07)　2007/04/18

  500. 全飛行速度域におけるソニックブーム低減用複葉翼の特性

    倉谷 尚志, 小川 俊広, 鄭 信圭, 大林 茂, 松野 隆, 川添 博光

    第5回サイレント超音速旅客機研究会　2007/04/06

  501. ドップラーライダによる後方乱気流の観測

    小笠原健, 三坂孝志, 小川俊広, 大林茂, 加来信之, 奥野義則

    航空宇宙学会 第38期通常総会及び年会　2007/04/04

  502. Evolutionary Multiobjective Optimization of Steel Structural Systems in Tall Buildings International-presentation

    Rafal Kicinger, Shigeru Obayashi, Tomasz Arciszewski

    the Fourth International Conference on Evolutionary Multi-Criterion Optimization (EMO 2007)　2007/03/05

  503. リージョナル旅客機のための多分野融合設計探査

    鄭信圭, 大林茂, 熊野孝保, 森野裕行, 畑中圭太

    第56回理論応用力力学講演会　2007/03

  504. Multidisciplinary Design Exploration of Aircraft Configuration International-presentation

    Shigeru Obayashi

    International Symposium on Computational Challenges in Thermal, Fluids and Energy Systems　2007/03/01

  505. Future direction of Japanese aeronautical science and technology International-presentation

    Shigeru Obayashi

    International Forum for Joint Anniversary Lyon-Tohoku, Teaming for the Future　2007/02/08

  506. Silent supersonic transport friendly to environment- A biplane concept International-presentation

    Shigeru Obayashi

    International Forum for Joint Anniversary Lyon-Tohoku, Teaming for the Future　2007/02/08

  507. ラフ集合による設計空間特徴抽出

    大林茂

    平成18年度科研費空力班シンポジウム　2007/01/26

  508. Numerical Simulation of Clear Air Turbulence Using 4D-Var International-presentation

    T.Misaka, S.Obayashi, E. Endo

    45th AIAA Aerospace Sciences Meeting and Exhibit　2007/01/08

  509. Investingation of Supersonic Wing Shape Using Busemann Biplane Airfoil International-presentation

    M.Yonezawa, H.Yamashita, S. Obayashi, K. Kusunose

    45th AIAA Aerospace Sciences Meeting and Exhibit　2007/01/08

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    AIAA-2007-0686

  510. A Study of Busemann-Type Biplane for Avoiding Choked Flow International-presentation

    H.Yamashita, M.Yonezawa, S. Obayashi, K. Kusunose

    45th AIAA Aerospace Sciences Meeting and Exhibit　2007/01/08

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    AIAA-2007-0688

  511. Numerical Investigation on Sonic Boom Reduction with Non-axisymmetric Body International-presentation

    Yamashita, H, Obayashi, S

    46th AIAA Aerospace Sciences Meeting and Exhibit　2007/01/07

  512. 後方乱気流の計測融合シミュレーション

    三坂孝志, 小笠原健, 大林茂, 加来信之, 奥野善則

    第２０回数値流体力学シンポジウム　2006/12/18

  513. Design Exploration into a Tire Noise Reduction Problem International-presentation

    International Workshop on Multidisciplinary Design Exploration in Okinawa 2006　2006/12/12

  514. “Multi-Objective Design Optimization of Air Cleaner Fan Using Kriging Model International-presentation

    K. Sugimura, K. Shimoyama, S. Jeong, S. Obayashi

    International Workshop on Multidisciplinary Design Exploration in Okinawa 2006　2006/12/12

  515. Experimental Study on Aerodynamics of Supersonic Biplane for Sonic-Boom Reduction International-presentation

    Naoshi Kuratani, Toshihiro Ogawa, Hiroshi Yamashita, Masahito Yonezawa, Shigeru Obayashi

    Third International Conference on Flow Dynamics　2006/11/07

  516. An Approach to Avoiding Choked Flow for Supersonic Biplane International-presentation

    Hiroshi Yamashita, Masahito Yonezawa, Shigeru Obayashi, Kazuhiro Kusunose

    Third International Conference on Flow Dynamics　2006/11/07

  517. Sweep Effect in Three-dimensional Busemann Biplane International-presentation

    Masahito Yonezawa, Hiroshi Yamashita, Shigeru Obayashi

    Third International Conference on Flow Dynamics　2006/11/07

  518. Multidisciplinary Optimization of Wing Shape with Engine Nacelle International-presentation

    Takayasu Kumano, Shinkyu Jeong, Shigeru Obayashi, Yasushi Ito, Keita Hatanaka, Hiroyuki Morino

    Third International Conference on Flow Dynamics　2006/11/07

  519. 非定常流れ場解析結果に対するデータマイニング手法の構築

    柴崎剛志, 大林茂

    日本機械学会 第19回計算力学講演会　2006/11/03

  520. フライトデータを用いた晴天乱気流の再現と流れ場のデータマイニング

    三坂孝志, 大林茂, 遠藤栄一

    日本機械学会流体工学部門講演会　2006/10/28

  521. A Practical Multidisciplinary Optimization Tools for Aifcraft Design International-presentation

    Takayasu Kumano, Shinkyu Jeong, Shigeru Obayashi, Yasushi Ito, Keita Hatanaka, Hiroyuki Morino

    The Sixth International Symposium on Advanced Fluid Information (AFI-2006)　2006/10/26

  522. ソニックブーム低減のための超音速複葉翼周りの空力特性実験

    倉谷尚志, 古川剛, 小川俊広, 大林茂

    第44回飛行機シンポジウム　2006/10/18

  523. JAXA高揚力装置風洞模型への簡易遷移予測法の適用

    豊田 篤, 三坂 孝志, 大林 茂

    第44回飛行機シンポジウム　2006/10/18

  524. 超音速機における低ブーム胴体形状の研究

    米澤誠仁, 山下博, 大林茂, 楠瀬一洋

    第44回飛行機シンポジウム　2006/10/18

  525. リフティングボディ型再突入機形状の最適化による遷音速特性の改善

    鈴木邦広, 鄭信圭, 大林茂, 栗田充

    第38回流体力学講演会　2006/09/28

  526. K-H不安定流れのデータマイニング

    三坂孝志, 大林茂, 遠藤栄一

    日本機械学会 2006年度年次大会　2006/09/19

  527. OPTIMIZATION OF PISTON FOR DIESEL ENGINE USING KRIGING MODEL International-presentation

    Shinkyu Jeong, Youichi Minemura, Shigeru Obayashi

    ECCOMAS CFD2006　2006/09/05

  528. Flight Data Integreted LES for Clear Air Turbulence International-presentation

    Takashi Misaka, Shigeru Obayashi, Eiichi Endou

    ECCOMAS CFD2006　2006/09/05

  529. Multi-objective design exploration using efficient global optimization International-presentation

    Shigeru Obayashi

    ECCOMAS CFD2006　2006/09/05

  530. APPLICATION OF THE VARIABLE-FIDELITY MDO TOOLS TO A JET AIRCRAFT DESIGN International-presentation

    Keita Hatanaka, Shigeru Obayashi, Jeong Shinkyu

    25th International Congress of the Aeronautical Science　2006/09/03

  531. Measurement-Integrated Simulation of Clear Air Turbulence International-presentation

    Takashi Misaka, Shigeru Obayashi, Eiichi Endou

    Tohoku-SNU Joint Workshop on Next Generation Aero Vehicle　2006/07

  532. 革新的計算科学技術への展望

    大林 茂

    航空宇宙数値シミュレーション技術シンポジウム2006　2006/06/23

  533. 複葉超音速翼空力設計の現状と課題

    米澤誠仁, 山下博, 大林茂, 楠瀬一洋

    航空宇宙数値シミュレーション技術シンポジウム2006　2006/06/23

  534. Multi-Objective Design Exploration for Multidisciplinary Design Optimization of Aircraft International-presentation

    Shnkyu Jeong, Takayasu Kumano, Shigeru Obayashi

    ICNPAA-2006　2006/06/21

  535. Optimization and Data Mining to a Tire Noise Reduction Problem International-presentation

    Jin Ne Lim, Shinkyu Jeong, Shigeru Obayashi, Tohoku University, Toshiyuki Ikeda, Masataka Koishi, The Yokohama Rubbe

    The Third International Symposium on Transdisciplinary Fluid Integration　2006/06/12

  536. Diesel Engine Piston Shape Design Using Multi-Objective Efficient Global Optimization International-presentation

    Shinkyu JEONG, Youichi MINEMURA, Shigeru OBAYASHI

    PARALLEL CFD 2006　2006/05/15

  537. 形状変化を用いた二枚翼におけるチョーク回避法の検討

    山下博, 米澤誠仁, 大林茂, 楠瀬一洋

    日本航空宇宙学会 第３７期年会　2006/04/04

  538. 超音速複葉翼における後退角とテーパーの効果比較

    米澤誠仁, 山下博, 大林茂, 楠瀬一洋

    日本航空宇宙学会 第３７期年会　2006/04/04

  539. Multi-Objective Design Exploration for Multidisciplinary Design Optimization Problems International-presentation

    S. Obayashi

    IFS-JAXA Joint Symposium on Advanced Fluid Information (AFI-2005)　2005/12

  540. Multi-Objective Design Exploration for Multidisciplinary Design Optimization Problems International-presentation

    韓国KCFE学会　2005/10

  541. Evolutionary Multiobjective Optimization for Reginal- JetWing by CFD-CSD Coupling International-presentation

    EUROGEN2005　2005/09

  542. 多目的最適化と高次元の可視化

    第33回可視化情報シンポジウム　2005/07

  543. "Multi-Objective Design Exploration for Aerodynamic Configurations," International-presentation

    Shigeru Obayashi, Shinkyu Jeong, Kazuhisa Chiba

    35th AIAA Fluid Dynamics Conference and Exhibit　2005/06/06

  544. "High-Fidelity Multidisciplinary Design Optimization of Wing Shape for Regional Jet Aircraft," International-presentation

    Chiba, K, Obayashi, S, Nakahashi, K, Morino, H

    Third International Conference on Evolutionary Multi-Criterion Optimization,　2005/03

  545. Multi-Objective Evolutionary Computation for Aerodynamic Design Problems International-presentation

    S. Obayashi

    5th International Symposium on Computational Technologies for Fluid/Themal/Stress systems with Industrial Applications -CFD for Design and Optimization2　2004/07/25

  546. "Visualization and Data Mining of Pareto Solutions Using Self-Organizing Map," International-presentation

    Shigeru Obayashi, Daisuke Sasaki

    Second International Conference on Evolutionary Multi-Criterion Optimization　2003/04

  547. AILERON FLUTTER CALCULATION FOR A SUPERSONIC FUSELAGE-WING CONFIGURATION International-presentation

    23rd Congress of the International Council of the Aeronautical Sciences　2002/09/08

  548. Pareto Solutions of Multipoint Design of supersonic wings Using Evolutionary Algorithms International-presentation

    Adaptive Computing in Design and Manufacture　2002/04/16

  549. Multipoint Optimal Design of Supersonic Wing Using Evolutionary Algorithms International-presentation

    Computing the Future III　2000/06

  550. Airfoil Shape Parameterization for Evolutionary Computation International-presentation

    Genetic Algorithms for Optimisation in Aeronautics and Turbomachinery　2000/05

  551. Multidisciplinary Design Optimization of Aircraft Wing Planform Based on Evolutionary Algorithms International-presentation

    1998 IEEE International Conference on Systems, Man, and Cybernetics　1998/10/11

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    (プロシーディング) Proceedings of 1998 IEEE International Conference on Systems, Man, and Cybernetics (CD-ROM) IEEE 1998

  552. A Comparative Study of Aerodynamic Optimization International-presentation

    Genetic Algorithms Workshop and Tutorial　1998/10

  553. Genetic Algorithms and Extension to Multiobjective Optimization International-presentation

    Genetic Algorithms Workshop and Tutorial　1998/10

  554. Inverse Optimization: Concept and Design Results International-presentation

    Genetic Algorithms Workshop and Tutorial　1998/10

  555. Direct Optimization: Lessons Learned International-presentation

    Genetic Algorithms Workshop and Tutorial　1998/10

  556. Niching and Elitist Models for MOGAs International-presentation

    Parallel Problem Solving from Nature - PPSN V　1998/09/27

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    (プロシーディング) Parallel Problem Solving from Nature - PPSN V Springer 1998 260 269

  557. Coding by Taguchi Method for Evolutionary Algorithms Applied to Aerodynamic Optimization International-presentation

    Fourth ECCOMAS Computational Fluid Dynamics Conference　1998/09/07

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    (プロシーディング) Proceedings of the Fourth ECCOMAS Computational Fluid Dynamics Conference John Wiley and Sons, Ltd. 1998 196 203

  558. Design Optimization of Supersonic Wings Using Evolutionary Algorithms International-presentation

    Fourth ECCOMAS Computational Fluid Dynamics Conference　1998/09/07

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    (プロシーディング) Proceedings of the Fourth ECCOMAS Computational Fluid Dynamics Conference John Wiley and Sons, Ltd. 1998 575 579

  559. Supersonic Inverse Design Method for Wing-Fuselage Design International-presentation

    International Symposium on Inverse Problem in Engineering Mechanics 1998　1998/03/24

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    (プロシーディング) INVERSE PROBLEMS IN ENGINEERING MECHANICS Elsevier Science 1998

  560. Supersonic Transport Design Optimization Based on Evolutionary Algorithms International-presentation

    International CFD Workshop for Super-Sonic Transport Design 1998　1998/03/16

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    (プロシーディング) Proceedings of International CFD Workshop for Super-Sonic Transport Design 1998 航空宇宙技術研究所 1998 129 143

  561. Pareto Genetic Algorithm for Aerodynamic Design Using the Navier-Stokes Equations International-presentation

    EUROGEN '97　1997/11/28

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    (プロシーディング) Genetic Algorithms and Evolutionary Strategies in Engineering and Computer Science John Wiley and Sons 1997 245 266

  562. Cascade Airfoil Design by Multiobjective Genetic A International-presentation

    Second International Conference on Genetic Algorithms in Engineer　1997/09/02

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    (プロシーディング) IEE Conference Publication No. 446 IEE 1997

  563. Aerodynamic Optimization with Evolutionary Algorithms International-presentation

    Inverse Design and Optimisation Methods　1997/04/21

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    (プロシーディング) VKI LS 1997-05 von Karman Institute 1997

  564. Target Pressure Optimization Using MOGA International-presentation

    Inverse Design and Optimisation Methods　1997/04/21

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    (プロシーディング) VKI LS 1997-05 von Karman Institute 1997

  565. Aerodynamic inverse optimization with Genetic Algorithms International-presentation

    IEEE International Conference on Industrial Technology　1996/12/02

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    (プロシーディング) Proceedings of the IEEE ICIT '9696TH8151 IEEE 1996 421 425

  566. Three-Dimensional Aerodynamic Optimization with Ge International-presentation

    Third ECCOMAS Computational Fluid Dynamics Conference　1996/09/09

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    (プロシーディング) Third ECCOMAS Computational Fluid Dynamics Confere John Wiley & Sons 1996 420 424

  567. Aerodynamic optimization with evolutionary algorithms International-presentation

    UKACC International Conference, CONTROL '96　1996/09/02

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    (プロシーディング) IEE 427 CONTROL '96 IEE 1996 687 692

  568. Inverse Optimization Method for Blunt Trailing-Edg International-presentation

    15th International Conference on Numerical Methods in Fluid Dynam　1996/06/24

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    (プロシーディング) 15th International Conference on Numerical Methods Springer 1997 117 122

  569. Progress in Computational Unsteady Aerodynamics

    第７回数値流体力学シンポジウム　1995/12/20

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    (プロシーディング) 講演論文集 日本数値流体力学会 1995 9 18

  570. Genetic Algorithm for Aerodynamic Inverse Optimiza International-presentation

    First IEE/IEEE International Conference on Genetic Algorithms in　1995/09/12

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    (プロシーディング) IEE Conference Publication No. 414 IEE 1995

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Industrial Property Rights 2

  1. 遠隔気流計測装置、遠隔気流計測方法及びプログラム

    井之口浜木, 独立行政法人, 宇宙航空研究開発機構, 大林茂, 三坂孝志, 菊地亮太

    特許6583677

    Property Type: Patent

    Holder: 独立行政法人 宇宙航空研究開発機構、東北大学

  2. 光学式遠隔気流計測装置

    井之口浜木, 独立行政法人, 宇宙航空研究開発機構, 大林茂, 三坂孝志, ファビオナカバヤシ

    特許5376440

    Property Type: Patent

    Holder: 独立行政法人 宇宙航空研究開発機構、東北大学

Research Projects 28

  1. Superlayer fluid science near an object surface for the next-generation high-speed transportation vehicles

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2023/04/01 - 2027/03/31

  2. Superlayer flow science near the object surface for the next-generation high-speed transportation

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2023/04 - 2027/03

  3. データ同化による風洞実験デジタルツイン

    大林 茂, 焼野藍子, 野々村拓, 奥泉寛之, 永井大樹

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 基盤研究(A)

    Category: 基盤研究(A)

    Institution: 東北大学

    2021/04 - 2025/03

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    本研究では、風洞実験における画像計測と数値流体力学(CFD)に基づくシミュレーションをデータ同化で融合することで不確かさを減らす、リアルとヴァーチャルを融合した新しい実験法「風洞実験デジタルツイン」を研究する。この「風洞実験デジタルツイン」は、計測上の物理的制約で拘束された画像計測から、必要とするすべてのデータをデジタルツイン上で取得することを可能にする。デジタルツインの構築に必要なデータ量を明らかにし、十分な精度を保証するための指針を得て、デジタルツインを介した風洞実験データの自由な取得を可能にし、ポストコロナの時代に求められる風洞実験の省力化、遠隔化、自動化に資する。

  4. Development of measurement fusion simulation method for unsteady three-dimensional vortex flow

    OBAYASHI SHIGERU

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2018/04 - 2021/03

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    We developed and improved a technique for measuring fluid forces and flow fields by magnetically levitating a model in a wind tunnel, and increased our knowledge of basic fluid mechanics by investigating the fluid forces acting on a cylinder and the vortices emitted from the cylinder, and applied it to sports engineering by proposing the use of a turbo jab, which is beneficial as an introduction to javelin throwing events. In addition, we improved the efficiency of data assimilation techniques using measured values and optimized the measurement positions so that computer simulations can faithfully reproduce the flow in the wind tunnel.

  5. Development of an integrated tool for visualizing unsteady flow in aerodynamic design

    ASAI KEISUKE, Nakakita Kazuyuki, Liu Tianshu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2016/04 - 2019/03

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    At the forefront of aircraft development, the target of aerodynamic design is shifting to unsteady phenomena that occur at the boundaries of the flight boundaries, such as stall and buffet. In this research, an integrated visualization method capable of measuring two-dimensional distribution of time-varying surface-pressure and shear-stress fields with high resolution and high accuracy has been developed as an experimental tool that can be used universally for unsteady aerodynamic design of aircraft. For pressure field measurements, we succeeded in capturing fluctuations with the Pa order magnitude and in the kHz order frequencies using advanced noise-reduction techniques such as SVD. For the shear-stress field measurements, we developed a visualization method using the principle of optical flow and confirmed its accuracy and robustness through carefully-designed verification tests. We prepared for a release of these measurement techniques as general-purpose visualization tools.

  6. Evolution of Nonlinear Aerodynamic Modelling based on Combined EFD/CFD/RT Approach

    Asai Keisuke, JIANG XIN, UENO SEIYA, OBAYASHI SHIGERU, SHIMOYAMMA KOJI, NUMATA DAIJU, YANAGIHARA MASAAKI, WATANABE SHIGEYA

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2013/04 - 2016/03

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    In order to develop a new type of flight simulation technique for wind-tunnel testing, the specialists of EFD, CFD, and RT have collaborated in merging the associated technologies of these fields. The six degree-of-freedom manipulator such as a HEXA-type parallel-link robot and a Magnetic Suspension and Balance System (MSBS) have been developed and applied to wind-tunnel testing to identify the nonlinear aerodynamic modelling of the model. One of the targets of this study was the behavior of a maneuvering delta wing at high angles of attack. The other was free-flight tests of a prolate spheroid and a winged body using the MSBS. New visualization techniques such as two-color unsteady pressure-sensitive paint and luminescent mini tuft have been introduced and their effectiveness in dynamic wind-tunnel testing has been verified. The developed technique can provide a useful method for dynamic testing of automobiles and reentry space capsules.

  7. Experimental techniques in a supersonic wind tunnel with Magnetic Suspension Balance System

    OBAYASHI Shigeru

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2012/04 - 2015/03

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    Experimental techniques in a supersonic wind tunnel with Magnetic Suspension Balance System (MSBS) are developed in this research to suspend a model against starting load without mechanical support. The principal results were obtained as the following; a suspended model was accurately positioned at the center of a test section by the newly-developed fast response control system of MSBS, and the starting load was decreased by adjusting a total pressure within a setting chamber, making it possible to magnetically suspend a model in a supersonic wind tunnel testing.

  8. Spatio-temporal analysis of blood flow in bifurcation of blood vessel using ultrasonic-measurement-integrated simulation

    HAYASE Toshiyuki, OBAYASHI Shigeru, SAIJO Yoshifumi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2012/04 - 2015/03

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    It has been pointed out that hemodynamics has a strong relationship with occurrence and development of circulatory diseases. However primary parameter to these diseases is still unknown. This research was conducted for a simultaneous analysis of blood pressure (BP) and flow in a carotid artery using photoplethysmography (PPG) and two-dimensional ultrasonic-measurement-integrated (2D-UMI) simulation. The system analyzes BP and flow fields from the viewpoint of influence of phases of BP and flow corresponding to forward and backward waves on vessel wall. The simultaneous analysis system using PPG and 2D-UMI simulation was developed, and characteristics of the blood flow field in a carotid artery was clarified focusing on time variation of the phase corresponding to forward and backward waves identified by wave intensity (WI).

  9. Ground experiment of the innovative sonic boom reduction technology

    OBAYASHI Shigeru, KOBAYASHI Hideaki, ASAI Keisuke, NAGAI Hiroki, OGAWA Toshihiro, SAITO Tsutomu, KAWAZOE Hiromitsu, CHIBA Kazuhisa, NUMATA Daiju

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2011/04 - 2015/03

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    Design and evaluation systems for supersonic vehicles are constructed in this research to develop a low-boom supersonic vehicle based on Supersonic Biplane Theory. The following experimental and numerical simulation techniques were developed: free flight experiment of three-dimensional projectiles, surface pressure distribution measurement using ultrafast response pressure-sensitive paint, a calibration technique of pressure waveforms by the multipole method, a force balance measurement system in a supersonic wind tunnel, sonic boom estimation with consideration of the real atmospheric conditions, and design optimization and exploration for unsteady phenomena.

  10. Study of Next-Generation CFD toward Petaflops Computers

    NAKAHASHI Kazuhiro, YAMAMOTO Satoru, OBAYASHI Shigeru, KOBAYASHI Hiroaki, YAMAMOTO Kazuomi, SASAKI Daisuke, JEONG Shinkyu, TAKIZAWA Hiroyuki, EGAWA Ryusuke, KUROTAKI Takuji, ENOMOTO Shunji, IMAMURA Taro, TAKAHASHI Shun

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)

    Category: Grant-in-Aid for Scientific Research (S)

    2009/05 - 2014/03

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    This study was conducted aimed at solving the problems of the current CFD in the use of the aerodynamic designs of aircrafts, such as the physical model dependence of the computational results and the increase of the work load for treating complex geometries. The Building-Cube Method was proposed bearing the further performance improvement of computers in mind, and the various algorithm studies for practical use were conducted. One of the achievements was demonstrated by the world-leading large scale flow computation around a car using the K-computer. It is significant that the proposed CFD approach can treat extremely complicated and incomplete CAD data directly for the simulation. This can be a game-changing technology for aerodynamic design process of aircrafts and automobiles.

  11. 後方乱気流ライダ計測融合シミュレーション技術の確立

    大林 茂

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 挑戦的萌芽研究

    Category: 挑戦的萌芽研究

    Institution: 東北大学

    2008 - 2010

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    仙台空港には電子航法研究所(ENRI)により後方乱気流の検出を目的としたドップラーライダが設置されている。我々のグループでは、仙台空港において実フライト機を対象とした後方乱気流の計測を過去3年間継続的に行ってきており、あらゆる条件下における後方乱気流の位置データを保有している。我々のグループでは、ライダ計測値からの後方乱気流の自動抽出法を開発しており、開発した自動抽出法を全ての観測データに適用することにより、後方乱気流移流データベースを構築した。このデータベースにより,減衰過程と気象因子との相関関係を得て、時々刻々変化する気象条件に照らし合わせて後方乱気流の挙動を事前に予測することができると考えられる。そのため、構築した後方乱気流移流データベースにデータマイニング手法を適用した。それにより、気温の影響により後方乱気流の垂直移動距離が変化することを示すことができた。また、我々のグループでは数値流体力学シミュレーション(CFD)を利用した後方乱気流の挙動解析をベースとした離発着効率化をこれまで検討してきた。これまでは,実際の運航に近い技術になるほどCFDシミュレーションの果たす役割は大きくなかった。その理由としては、CFDシミュレーションが理想状態の解析を得意とし、大気乱れを含むような実環境下における後方乱気流の挙動を予測することが困難であることが挙げられる。そこで、従来のCFDシミュレーションとは異なる初期値・境界値の設定方法を行うために局地気象予報モデルを利用したネスティングシミュレーションも行った。これにより、仙台空港周辺で特に卓越する海風中に発生する水平ロール対流の中での後方乱気流の挙動を再現することができた。

  12. Analogue experiments of volcanic explosion focusing on pressure release processes

    GOTO Akio, OBAYASHI Shigeru, FURUKAWA Takeshi, OGAWA Toshihiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2008 - 2010

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    When analyzing volcanic explosion we often suppose the instantaneous release of pressurized gas and ignore gas species. Our laboratory experiments have revealed that even if total released energy is the same the resultant phenomena differs depending on gas release rate and thermodynamic properties of volcanic gas. We also observed the activity of Villarrica volcano, Chile. We did not catch air wave accompanying explosions but detected stable monochromatic infrasound. Using this we determined the shape of the cavity in the vent.

  13. Fundamental Research for Silent Supersonic Transport Based on Supersonic Biplane Theory

    OBAYASHI Shigeru, ASAI Keisuke, NAGAI Hiroki, SASOU Akihiro, KAWAZOE Hiromitsu, MATSUNO Takashi, NAKAHASHI Kazuhiro, MATSUSHIMA Kisa, JEONG Shinkyu, TSUBOI Nobuyuki, NAKAMURA Yoshiaki, MIYAJI Kouji, SATO Tetsuya, MATSUO Akiko, SAWAI Syujiro, FUJITA Kazuhisa, KOBAYASHI Hiroaki, TAGUCHI Hideyuki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2007 - 2009

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    Supersonic Biplane Theory is a concept of eliminating wave drag and sonic boom by using shock wave interaction between two airfoils facing each other. The following research topics are investigated in this research to construct and validate the theory : Definition of three-dimensional wing configuration and its optimization, Investigation of low speed characteristics of supersonic biplane by using CFD and EFD, Supersonic wind tunnel test of starting process of three-dimensional supersonic biplane, Free flight experiment of supersonic biplane using ballistic range.

  14. Improvement and advanced utilization of downscaling system of weather diagnosis

    IWASAKI Toshiki, YAMAZAKI Takeshi, SHA Imei, OBAYASHI Shigeru, MATSUSHIMA Dai, KANNO Hiromitsu, SASAKI Kaori, ISHII Shoken, IWAI Hironori, NODA Akira

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2007 - 2009

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    Downscaleprediction system of meso-scale phenomena has been developed with its applications to agriculture and aviation. To advance its predictive skill, further efforts are required to improve physics parameterization, and to optimize initial and lateral boundary conditions. In agriculture, predictabilities have been studied on local sever wind (Kiyokawadashi) and potential forecast of Magnaporthe grisea. Feasibility study has been made on monitoring/very short-range prediction system for aviation weather on the basis of data assimilation of Doppler lidar into downscale system.

  15. High-Resolution Numerical Method of Flow Using High-Density Mesh

    NAKAHASHI Kazuhiro, MATSUSHIMA Kisa

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2006 - 2008

  16. 非線型積分偏微分方程式と社会科学に現れる最適制御

    有澤 真理子, 大林 茂, 大西 匡光

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 基盤研究(C)

    Category: 基盤研究(C)

    Institution: 東北大学

    2005 - 2007

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    数理ファイナンスのオプション価格付け問題に現れるジャンプ付確率過程について考察した。特に、ジャンプ付確率過程に対応する積分偏微分方程式に関して、以下の研究をした。第一に、この方程式を適切に扱うために前年度導入した粘性解について、解の比較定理の証明を訂正した。(Annal.de I.H.P.Anal.Nonlin.Vol24-1,Jan.-Feb.(2007),pp.167-169.)積分方程式に含まれるレヴィー作用素の密度関数が特異的な場合、偏微分方程式に対して確立された理論があてはまらず、その難点を克服するために、Jensenの定理とAleksandrovの定理という凸解析の結果に立ち戻る必要があることがわかった。更に、この訂正によって、ジャンプ付確率過程のジャンプの大きさが場所によって異なる場合には、積分偏微分方程式には未だ技術的困難があることもわかった。第二に、新しく導入された粘性解の枠組みで、積分方程式の解の一様ヘルダー連続性を調べた。次の3通りの結果を得た。1.空間一次元の場合、積分偏微分方程式の中のレヴィー作用素は、積分密度関数が特異になればなるほど、二階一様楕円型偏微分作用素に近い平滑化作用を持つ。2.空間次元が二次以上の場合、レヴィー作要素と二階一様楕円型偏微分作用素の和は積分密度関数の特異性によらず、二階一様楕円型偏微分作用素と同じ平滑化作用を持つ。3.空間次元が二次以上で、偏微分作用素が退化楕円型である場合、方程式に零次項を加えると、その解は零次項の係数の逆数に比例した平滑性を持つ。以上3通りの結果より、すべての空間次元で、たとえ偏微分作用素が退化していても、レヴィー作用素の積分密度関数の特異性が十分高ければ、方程式に対応するジャンプ付確率過程はエルゴード性を持つことがわかった。この結果は、Proceedings of the 6th RITS Symposium on "Stochastic Processes and Applications to Mathematical Finance"(Ed.S.Ogawa, J.Akahori, S.Watanabe),World Scientifics,(2007)に発表された。

  17. Transdisciplinary Research for Silent Supersonic Aircraft by Integrating Computation and Experiment

    OBAYASHI Shigeru, HAYASE Toshiyuki, SASOH Akihiro, SAITOH Tsutomu, NAKAHASHI Kazuhiro, MATSUSHIMA Kisa

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: TOHOKU UNIVERSITY

    2003 - 2006

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    One of the fundamental problems preventing commercial transport aircraft from supersonic flight is the generation of strong sonic booms. The strength of the shock waves generated by an aircraft flying at supersonic speed is a direct function of both the aircraft's weight and its occupying volume; it has been very difficult to sufficiently reduce the shock waves generated by the heavier and larger conventional supersonic transport (SST) configuration to meet acceptable at-ground sonic-boom levels. Our team first re-analyzed the classic Busemann biplane configurations to understand its basic wave cancellation concept using modern Computational Fluid Dynamics (CFD) tools. We then designed a two-dimensional (2-D) supersonic biplane that not only shows the desired aerodynamic characteristics at its design condition, but also outperforms a zero-thickness flat-plate airfoil. (Zero-thickness plat-plate airfoils are known as the most efficient monoplane airfoil at supersonic speeds.) Also we studied biplane performance not only at their design Mach numbers but also at off-design conditions. We extended the analysis to 3-D wing configurations as well. In parallel to the computational studies, we carried out series of experiments. The first experiment conducted here was the sonic boom experiment using gas gun. The N-wave was captured successfully. The second experiment was the 2 D wind tunnel test using Indraft Wind Tunnel Facility newly constructed in this research. In addition, conventional wind tunnel tests were conducted using existing wind tunnels. These experiments revealed important off-design flow features to be further studies by using CFD. The main research result is the development of the supersonic biplane theory. Biplane configuration allows canceling shock waves created by supersonic objects. It can be unconventional and innovative concept for future supersonic transport.

  18. Study of Near-Sonic Flows

    NAKAHASHI Kazuhiro, MATSUSHIMA Kisa, OBAYASHI Shigeru, TAKAYAMA Kazuyoshi, FUJII Kozo, KIM Hyoung-Jin

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: TOHOKU UNIVERSITY

    2002 - 2005

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    Numerical and experimental studies of flows at near-sonic speed have been conducted. The following are the major results obtained by this research. 1. The TAS-code, an in-house unstructured-grid based CFD soft, was sophisticated and a practical engineering tool for analyzing and designing transonic airplanes was constructed. 2. An efficient direct optimization code using the adjoint equation was developed. It was applied to optimize the wing-nacelle-pylon integration of a transonic airplane and an important engineering information was obtained. 3. An efficient, multi-disciplinary optimization code for designing a high-performance transonic airplane was developed using the genetic algorithm and the data mining method. 4. A new method to improve the prediction accuracy of the drag by CFD was developed. With this method, an optimization of winglet, which is generally very sensitive to the solution accuracy, becomes possible. 5. A sonic plane at Mach 0.98 was aerodynamically optimized using the TAS-code. The result showed 25% improvement of the lift-to-drag ratio and the important knowledge of a general condition for an efficient sonic plane was obtained. 6. Dynamically unstable tendency of a reentry capsule at transonic speed was numerically analyzed and a prediction method for the dynamic stability of the capsule was proposed. 7. Physics of base flows of a high-speed vehicle was numerically investigated with the LES/RANS hybrid methodology. It was shown that the time-series characteristics at transonic speed was significantly different from other speed regimes. 8. An elevon reversal phenomena at near-sonic speed of a reusable space plane was numerically investigated using the TAS-code and the cause was identified. The method to prevent the elevon reversal was proposed. 9. Various flow phenomena of weak shock waves were experimentally and numerically investigated for the physical understanding.

  19. A New Design Method for Market-Oriented Aircraft

    OBAYASHI Shiogeru

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: TOHOKU UNIVERSITY

    1999 - 2001

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    Toward aircraft built domestically or developed by Asian Airbus-like consortium, researches have bee conducted for market, Computational Fluid Dynamics (CFD), and design optimization. Market study focused on feasibility of supersonic regional transport, which connects Asian cities within one-day round trip. A conceptual design of supersonic regional jet has been presented. Sophisticated Evolutionary Multiobjective Optimization (EMO) has been developed and applied to supersonic wing design. This research is one of the most realistic EMO applications and has been recognized internationally. EMO searches many compromised solutions (Pareto solutions) between multiple objective functions simultaneously. The resulting set of solutions reveals design tradeoffs between conflicting design objectives. This method has been applied to supersonic wing design with four design objective and various design tradeoffs have been examined. The tradeoff study is trivial between two objectives : however, it will become more difficult as the number of design objectives increases. Therefore, aiming for real-world applications of EMO, visualization of Pareto solutions are studied as post-processing together with the improvement and application of EMO itself. Self-Organizing Map (SOM) has been utilized as a visualization technique of high dimensional space. Datamining of design tradeoffs between multiple design objectives are performed by using SOM of Pareto solutions in the objective function space. SOM is also confirmed to be useful as the datamining tool by mapping the solutions in design variable space because the resulting SOM represents the aerodynamic knowledge in wing design througjh the clusters of design variables. In addition to these works, researches have been performed for unstructured adjoint approach as an alternative optimization method and for extension of CFD code to fluid-structure interaction toward multidisciplinary design optimization. These activities have been reported at international conferences.

  20. Transition Measurement and Prediction of a Supersonic Experimental Aircraft Wing Boundary Layer

    KOHAMA Yasuaki, FUKUNISHI Yu, IKOHAGI Toshiaki, NAKAHASHI Kazuhiro, WATANABE Hideo, OHBAYASHI Shigeru

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B).

    Category: Grant-in-Aid for Scientific Research (B).

    Institution: TOHOKU UNIVERSITY

    1998 - 2000

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    Through 3 years of the this research project, we have succeeded to clarify the complicated 3D transition mechanism. Especially, swept wing boundary layer transition mechanism is as follows. Stream wise stationary vortex system start to appear as the primary instability. Unsteady wave instabilities of two different frequency modes are induced by this stationary vortices. High frequency secondary instability is considered to be the key sequence for the turbulent transition. By sucking the low momentum flow selectively at the position of stationary vortices, we have succeeded to delay the transition with at least 1/3 of the suction volume compared with the uniform suction case.

  21. Aerodynamic Research for the Next Generation Supersonic Transport

    NAKAHASHI Kazuhiro, SAWADA Keisuke, INOUE Osamu, OBAYASHI Shigeru, YAMAMOTO Satoru, FUKUNAGA Hisao

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A).

    Category: Grant-in-Aid for Scientific Research (A).

    Institution: Tohoku University

    1998 - 2000

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    In this study, aerodynamic problems related to the next generation supersonic transport have been investigated and the following results were obtained. 1. A CFD code based on the unstructured grid to efficiently and accurately evaluate the aerodynamic performance of airplanes was developed. This includes several new schemes such as the surface/volume grid generation methods using the CAD data and the implicit time integration on unstructured grid. 2. The CFD code was applied to evaluate the aerodynamic coefficients of the NAL experimental supersonic airplane in ascent flight. Numerical result revealed the cause of the high lift production during the transonic flight regime. 3. The separation process of the NAL experimental supersonic airplane from the rocket booster was numerically simulated and the aerodynamic coefficients during the separation were obtained by a newly developed overset grid method. This scheme is a promising approach to evaluate the dynamic stability of the airplane as well. 4. For aerodynamic investigations of the takeoff/landing performance of a supersonic transport, a numerical scheme to predict vortex-dominated flows over delta wings were developed using the adaptive refinement and the vortex-center identification. This scheme was shown to be effective to accurately predict the vortex breakdown at high angle of attack. 5. An inverse design method originally developed for transonic wings was extended to supersonic wings. With this code, the main wing of the NAL experimental supersonic airplane was designed to realize the enlarged natural laminar flow on the upper surface of the wing for improved L/D performance. 6. An efficient adjoint optimization code has been developed using the unstructured grid approach, The resulting code has been used for aerodynamic shape optimization problems of wing alone, wing-fuselage, and wing-fuselage-nacelle configurations, as well as flap angle optimization on the wing-fuselage configuration at transonic cruise. 7. An improved multiobjective genetic algorithm has been developed and applied to the supersonic wing design. Four design objectives were considered : minimizations of aerodynamic drag both at supersonic and transonic cruise conditions as well as minimizations of pitching moment and root-bending moment. The design results indicate that a new type of "arrow wing" configuration has good performances in all design objectives.

  22. Development and Evaluation of the Unstructured-Grid CFD

    NAKAHASHI Kazuhiro, KATO Takuma, OBAYASHI Shigeru, FUKUNISHI Yu, MITANI Toru, ANDO Yasunori

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: TOHOKU UNIVERSITY

    1997 - 1999

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    The present study is to refine and examine the unstructured-grid CFD (computational fluid dynamics) so as to use it as a practical engineering tool for analysis and design of fluid machineries. In the three-year research, the following results were obtained. (1) A new method to generate unstructured surface grid on the CAD-define model was developed. With this method, the pre-processing procedure of the unstructured-grid CFD was significantly simplified (2) An implicit time integration and a space marching solution algorithms were developed to reduce the computational time of the flow solver on unstructured grids. The applicability of the flow solver was also extended to combustion and incompressible flows. (3) A solution-adaptive refinement method coupled with a flow-feature detection was proposed. This method was demonstrated of its effectiveness for the high-alpha delta wings. (4) An overset unstructured grid method was proposed to compute flow around multiple bodies with relative motions. (5) The accuracy and usefulness of the unstructured-grid CFD were evaluated by applying it to wings, airplanes, SCRAM jet engines, cavity and rectangular-duct flows, and so on. These results met more than our expectations. The newly proposed algorithms during the research have already been recognized in the international academic conferences. Several new directions of the unstructured-grid CFD, such as optimization, were also commenced during this research.

  23. Aerodynamic Design of Supersonic Transport Competitive

    System: Cooperative Research

    1996/04 -

  24. 遺伝的アルゴリズムによる航空機主翼形状の数値的空力最適化

    大林 茂

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 奨励研究(A)

    Category: 奨励研究(A)

    Institution: 東北大学

    1996 - 1996

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    本研究では、遺伝的アルゴリズムを利用して、3次元ナビエ・ストークス方程式による航空機主翼形状の空力最適化を世界で初めて行った。従来、ナビエ・ストークス方程式を用いての最適化は、ナビエ・ストークス計算そのものに時間がかかるので、最適化法としての勾配法や遺伝的アルゴリズムによる方法を問わず、行われていなかった。例えば勾配法では、勾配計算が複雑で時間がかかりすぎるし、遺伝的アルゴリズムでは、評価回数が多いので全計算時間が莫大なものになる。しかし、遺伝的アルゴリズムは並列性に優れているので、十分強力な並列計算機を用いれば、現実的な計算時間で最適化をすることが可能と考えられる。 本研究では、並列化に加えて、多重格子法によるナビエ・ストークス計算そのものの高速化、さらに設計モデルの単純化を行うことにより、比較的短時間で主翼形状の空力最適化を行うことが可能となった。ここで、設計モデルの単純化のために、2次元翼型ではキャンバー線を固定し、翼厚分布のみを変数とした。また3次元的には、翼平面形を固定し、捻れ角のみを変数とした。 一方、空力性能だけでは現実的な設計はできないので、構造力学的な拘束条件を加えた。結果として得られた翼は、既存の設計指針や空力性能を高めるための理論的・経験的知見をすべて矛盾なく満たしており、現モデルの範囲内で最適な翼であることが確認された。

  25. 超音速ボルテックスジェネレーターの提案

    中橋 和博, 大林 茂

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 基盤研究(C)

    Category: 基盤研究(C)

    Institution: 東北大学

    1996 - 1996

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    本研究では、亜音速場でよく用いられる縦渦導入による境界層剥離制御法が超音速流中の境界層剥離に対しても有効かどうかを数値解析でもって調べること,およびそのための効率よい数値計算手法の構築を目的とし,研究を以下のように進めて大きな成果を得た. 1.超音速流中のボルテックスジェネレーターまわりの詳細な数値計算を効率よく行うための数値解法の開発を進めた.従来の差分法計算法に生じる計算特異点等の問題点を解決するため,非構造格子法によるナビエ・ストークス計算コードの開発を進めた.その結果,計算特異点等の問題が解決されたことにより計算時間は従来の計算法に比べ数分の1に減らすことが可能になり,その有効性を確認した.この計算法は,世界的に現在主流の差分法に基づく計算法に取って代わりうる能力があり,数値流体力学研究への貢献は非常に大きい. 2.平板上に三角錐状の突起をつけた場合および同様の形状の空洞を設けた場合について,それらが超音速流中において誘起する流れ場をナビエ・ストークス数値計算により調べた.その結果,突起形態および空洞形態ともその後流に対の縦渦を誘起することを確認し,かつその誘起渦度の強さは三角錐の開き角と一様流のマッハ数との関係で大きく変化することを見いだした.また,空洞型ボルテックスジェネレーターは超音速場での衝撃波発生および空力加熱問題点で有利であるが,生成された縦渦が下流では壁面へと進んで平板境界層と融合し,境界層外の運動量を境界層に導く効果は弱くなってしまうこと,また,三角錐開き角とマッハ数との関係も上流境界層が厚い場合は明確ではないとの結果を得た. 以上の研究において,備品として購入したコンピュータはプログラム開発および計算前処理と後処理端末として非常に有効であった.

  26. 数値流体力学を用いた空力最適化アルゴリズムの研究

    大林 茂

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 奨励研究(A)

    Category: 奨励研究(A)

    Institution: 東北大学

    1995 - 1995

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    近年の数値流体力学(CFD)の発達に伴い、CFDを用いて翼などの空力形状の最適化を数値的に行う試みがなされている。しかし、流体問題の非線形性、解析のコスト、それに航空機設計における制約条件の厳しさ(多さ)などのため、勾配法に基づく従来の最適化法を空力最適化に適用することは困難であった。 遺伝的アルゴリズム(GA)は、生物進化に着想を得た確率的最適化法の一種である。この方法は、勾配に関する情報を必要としない、ロバストな最適化法として知られている。しかし、GAでは毎世代、設計候補の集団の個々のメンバーに対し適応度評価をするため、莫大な数の評価計算が必要となる。空力最適化では、GFDによる流体解析のコストが高いため、単純にGAを適用すると膨大な計算時間が必要となってしまう。 空力形状を設計する場合、物体まわりの圧力分布が分かれば空力性能の概略が分かるので、圧力分布を指定することにより形状を設計する逆設計法がよく用いられている。この圧力分布から見積もった空力性能を最適化すると、GAを効率的に利用できるが分かった。すなわち、各設計候補にGFDによる流体解析をするのではなく、圧力分布から得られる揚力と抵抗の見積もりから設計評価をすることで、GAに必要とされる莫大な数の評価計算をはるかに短縮できた。 本研究では、こうしてGAにより得られた最適な圧力分布をターゲットとして、GFDを用いて逆問題を解き、空力的に最適な形状を求める逆最適設計法を提案した。この方法を、2次元遷音速翼型及び3次元遷音速翼の設計に適用し、設計例を示した。

  27. Aerodynamic Optimization Using Computational Fluid Dynamics Competitive

    1994/04 - 1995

  28. 圧縮性Navier-Stokes方程式の数値計算法の開発と応用

    大林 茂

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 奨励研究(A)

    Institution: 東京大学

    1986 - 1986

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Teaching Experience 8

  1. 融合流体情報学　東北大学

  2. 応用計算力学特論　室蘭工業大学

  3. 先端機械工学特論　日本大学工学部

  4. 数値流体力学特論　東北学院大学

  5. 航空宇宙流体工学　東北大学

  6. 自然界の構造　東北大学

  7. 流体力学　東北大学

  8. 数学　東北大学

Show all Show first 5

Social Activities 50

  1. 飛行機のながれ ～航空産業のデジタルとグリーン～

    令和4年度みやぎ県民大学大学開放講座 東北大学流体科学研究所 ながれの科学

    2022/09/02 - 2022/09/02

  2. グローバルCOE航空宇宙流体科学サマースクール

    2011/08/03 - 2011/08/05

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    東北大学グローバルCOE プログラム「流動ダイナミクス知の融合教育研究世界拠点」が主催となり，宇宙航空研究開発機構，名古屋大学，鳥取大学及び東北大学の方々の研究交流を目的としたサマースクールを開催．

  3. グローバルCOE航空宇宙流体科学サマースクール

    2010/08/02 - 2010/08/04

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    東北大学グローバルCOE プログラム「流動ダイナミクス知の融合教育研究世界拠点」が主催となり，宇宙航空研究開発機構，名古屋大学，鳥取大学及び東北大学の方々の研究交流を目的としたサマースクールを開催．

  4. みやぎ県民大学 大学開放講座 主催：宮城県教育委員会

    2009/07/27 - 2009/08/21

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    プラズマの流れ，分子，原子のようなミクロの流れなどの日頃意識することのないながれから、飛行機に関わる様々なながれ、そして地下のながれまで様々なながれをご紹介し、その中に潜む科学を解き明かします。

  5. グローバルCOE航空宇宙流体科学サマースクール

    2009/08/08 - 2009/08/10

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    東北大学グローバルCOE プログラム「流動ダイナミクス知の融合教育研究世界拠点」が主催となり，宇宙航空研究開発機構，名古屋大学，鳥取大学及び東北大学の方々の研究交流を目的としたサマースクールを開催．

  6. のりもの展～現代から未来へ・ドキドキ体験２００８

    2008/07/19 - 2008/08/25

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    仙台市科学館における特別展にて超音速機MISORAの模型とパネルを旅客機の最新事情を提示している「航空旅行まめ知識コーナー」の一角に展示。

  7. みやぎ県民大学 大学開放講座 主催：宮城県教育委員会

    2006/09/01 - 2006/09/29

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    流れを科学する-身の回りの”流れ”を科学的に考察し、実生活と先端科学技術に利用されている現状と未来展望を解説する。

  8. 2006年度21世紀COE航空宇宙流体科学サマースクール

    2006/07/02 - 2006/07/04

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    東北大の21世紀COEプログラム「流動ダイナミクス国際研究教育拠点」が主催 となり，航空宇宙・流体科学の研究を通し、産業界やJAXA研究者，東北大教員・院生の交流を目的としたサマースクール

  9. 2005年度21世紀COE航空宇宙流体科学サマースクール

    2005/07/19 - 2005/07/21

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    東北大の21世紀COEプログラム「流動ダイナミクス国際研究教育拠点」が主催 となり，航空宇宙・流体科学の研究を通し、産業界やJAXA研究者，東北大教員・院生の交流を目的としたサマースクール

  10. 2004年度21世紀COE航空宇宙流体科学サマースクール

    2004/07/15 - 2004/07/17

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    東北大の21世紀COEプログラム「流動ダイナミクス国際研究教育拠点」が主催 となり，航空宇宙・流体科学の研究を通し、産業界やJAXA研究者，東北大教員・院生の交流を目的としたサマースクール

  11. みやぎ県民大学 大学開放講座 主催：宮城県教育委員会

    2011/09/02 -

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    プラズマの流れ，分子，原子のようなミクロの流れなどの日頃意識することのないながれから、飛行機に関わる様々なながれ、そして地下のながれまで様々なながれをご紹介し、その中に潜む科学を解き明かします。

  12. フジテレビとくだね

    2011/03/08 -

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    岡山での軍用機低空飛行が原因とみられる民家全壊事故に関する検証取材。

  13. フジテレビスーパーニュース

    2011/03/07 -

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    岡山での軍用機低空飛行が原因とみられる民家全壊事故に関する検証取材。

  14. 明治大学GCOEプログラム 第８回現象数理若手シンポジウム

    2011/01/12 -

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    講演“航空機の設計と数理モデル,”

  15. J-BILAT第五回セミナー(J-BILAT 5th seminar)

    2010/11/11 -

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    講演“日本の航空科学技術の研究ポテンシャルについて(Research Potential of Japanese Programme),”

  16. みやぎ県民大学 大学開放講座 主催：宮城県教育委員会

    2010/08/27 -

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    プラズマの流れ，分子，原子のようなミクロの流れなどの日頃意識することのないながれから、飛行機に関わる様々なながれ、そして地下のながれまで様々なながれをご紹介し、その中に潜む科学を解き明かします。

  17. 平成22年度多賀城市中央公民館講座「市民教養講座」

    2010/07/03 -

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    現代の急激に変化する社会状況や、あらゆるジャンルの最新情報等の講話を聴く事により、市民の教養を深め学習意欲の向上を図る。たま、この受講により、生涯学習に対する理解や関心を高め、市民の学びの輪が拡大することを目的とする。 テーマ：わくわくする未来の飛行機～これからの日本の活躍～

  18. 2枚翼 超音速機で復活へ

    2009/07/13 -

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    超音速機「MISORA」について

  19. 複葉で新型超音速機。東北大教授ら研究中。70年前の理論活用 騒音の元、衝撃波7割減。

    2009/03/28 -

  20. 複葉の超音速機開発へ。東北大衝撃波騒音70％減、燃費も向上。

    2009/03/25 -

  21. 複葉翼で新型超音速機。大林・東北大教授らモデル設計。衝撃波ごう音7割減。

    2009/03/23 -

  22. 複葉で新型超音速機。衝撃波騒音70％減。東北大がモデル完成。

    2009/03/17 -

  23. 複葉の超音速機開発加速。模型機、11年飛行目指す。

    2009/03/16 -

  24. 複葉翼で新型超音速機。厄介な衝撃波70％減。東北大がモデル設計。

    2009/03/16 -

  25. 新型は複葉で。東北大流体科学研究所、衝撃波大幅に低減開発へモデル完成。

    2009/03/15 -

  26. 「MISORA」複葉の新超音速機開発へ。東北大がモデル設計。厄介な衝撃波、70％減。

    2009/03/13 -

  27. 複葉機で超音速飛行。東北大が新型モデル設計。厄介な衝撃波70％減。

    2009/03/12 -

  28. 複葉で新型超音速機。東北大がモデル設計 衝撃波70％減。

    2009/03/11 -

  29. 複葉で新型超音速機。東北大流体力学研がモデル設計

    2009/03/09 -

  30. 東北大仙台セミナー そらからの贈り物

    2009/01/20 -

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    宇宙航空の最先端を知る 果てしない探究心 未知の世界に挑戦

  31. 東北大サイエンスカフェから ごう音軽減し実用へ

    2008/12/19 -

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    複葉翼でサイレント超音速機を作る

  32. 近づく宇宙 育て好奇心 東北大がセミナー複葉翼でサイレント超音速機を作る

    2008/12/14 -

  33. 第３回東北大学仙台セミナー 併設 宇宙の学校（コズミックカレッジ）

    2008/12/13 -

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    そらからの贈りもの～宇宙航空の最先端を知る～ 講演「わくわくする未来の飛行機～これからの日本の活躍～」

  34. 東北大学サイエンスカフェ

    2008/12/12 -

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    現在研究が進行中の最先端の科学技術に関する話題について、その研究を進めている当人が話すことによって、研究段階で市民の反応を知り、これからの社会が必要とする科学技術に対するイマジネーションを高める。 大学生、中高生などの若い世代に、知的感動と未来の社会の担い手にふさわしい科学技術に対する知識を与える場となるように企画する。

  35. 機械が“突然変異”するとき

    2008/12 -

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    旅客機や新幹線にも利用された，形を「進化させる技術」にせまる。より速く，多くの人を。飛行機や新幹線は，さまざまな要望に合わせて進歩しつづけてきた。その精密な形は，これまで技術者の経験と勘によって生み出されてきた。しかし近年，生物が進化するように，コンピューター上で「機械の形」が世代交代をくりかえし，“子供”を生み出す手法が導入されつつある。機械のさらなる進歩を支える「遺伝的アルゴリズム」を紹介。

  36. みやぎ県民大学 大学開放講座 主催：宮城県教育委員会

    2008/10/10 -

    More details Close

    流れを科学する-身の回りの”流れ”を科学的に考察し、実生活と先端科学技術に利用されている現状と未来展望を解説する。

  37. 衝撃波消し夢の空へ

    2007/12/30 -

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    大林茂の研究グループは、超音速機の開発に取り組んでいる。流体力学のコンピュータシミュレーションを専門とする大林らは、上下の翼の間に衝撃波の大半を閉じ込めて打ち消すという設計思想で、騒音解消に道を開こうとしている。

  38. 超音速複葉旅客機MISORA

    2007/12 -

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    大林茂教授のグループは、上下に２枚の翼（複葉）をもつ超音速旅客機「MISORA」を発表した。MISORAは、東京ーニューヨーク間を６時間でつなぎ、しかも従来の超音速機が発する巨大な騒音をほとんど出さないという。２枚の翼が可能にした、新しい超音速飛行技術を紹介。

  39. 衝撃波無し超音速旅客機

    2007/11/15 -

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    東北大が宇宙航空研究開発機構（JAXA）と開発している次世代超音速旅客機は翼が２枚。複葉だと低騒音、低燃費が実現できる。

  40. 超音速の「複葉機」 騒音を8割減らす

    2007/09/14 -

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    大林グループは騒音の発生を大幅に抑制できる超音速旅客機（SST）用の主翼設計。3年後目処に実験機製作。

  41. 「東北大学の新世紀」環境にやさしい超音速への挑戦！

    2007/08/27 -

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    「東北大学の新世紀」環境にやさしい超音速への挑戦！にて複葉超音速飛行の研究が放映された。

  42. 室蘭工大で特別講演

    2007/06/14 -

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    翼２枚で空気抵抗解消～航空輸送力の強化訴え

  43. サイレント超音速旅客機コンセプト「MISORA（みそら）」(MItegated SOnic-boom Research Airplane)

    2007/02 -

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    日本航空宇宙学会誌 Vol.55 No.637にてサイレント超音速旅客機コンセプト「MISORA（みそら）」(MItegated SOnic-boom Research Airplane)が表紙画像に 採用。

  44. 安全を目指せ 航空新技術の挑戦

    2006/10/14 -

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    NHK教育「サイエンスZERO」第141回「安全を目指せ 航空新技術の挑戦」にてJAXAと共同研究中の晴天乱気流の計算結果が放映された。

  45. 第１０回「航空宇宙技術フォーラム」

    2006/08/22 -

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    テーマ： 「環境にやさしい未来の超音速旅客機」による講演

  46. 日本発新型旅客機へ

    2005/11/14 -

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    超音速旅客機の騒音や衝撃波を大幅に軽減できる「複葉翼」の理論確率

  47. 「複葉翼」で課題克服 次世代理論の確立

    2005/09/23 -

    More details Close

    超音速旅客機の騒音や衝撃波低減の理論確立

  48. 東北大流体研・宇宙開発機構 共同研究で協力協定

    2004/06/18 -

  49. 流体科学研究所・宇宙開発機構 ロケット技術向上へ連携１７日調印

    2004/06/15 -

  50. 子供のための模型飛行機教室

    2002/09/28 -

    More details Close

    航空宇宙分野の専門家による飛行の原理の分かり易い解説と指導により,子供達に航空宇宙工学の基礎的な概念の一端を学んでもらう

Show all Show first 5

Media Coverage 62

  1. 晴天乱気流

    フジテレビ　ニュース番組 めざまし8「わかるまで解説」　乱気流による事故の多発をうけ 「晴天乱気流」について解説

    2024/05/30

    Type: TV or radio program

  2. 接着剤なしで異種材料接合

    日本経済産業新聞　10面

    2022/06/15

    Type: Newspaper, magazine

  3. 接着剤無しでCFRP/チタン合金の高強度接合を実現 - 金属3D造形による金属表面構造制御により界面はく離を抑制 -

    東北大学プレスリリース

    2022/05/26

    Type: Other

  4. 接着剤無しでCFRP/チタン合金の高強度接合を実現

    ジャムコニュース

    2022/05/26

    Type: Other

  5. 子供の科学

    誠文堂新光社　飛行機が低燃費に？主翼の空気の流れを解明!!(pp.6)

    2021/11/10

    Type: Newspaper, magazine

  6. 『「情熱Labo」#18 東北大学 大林 茂 教授 「空気の流れ」謎のメガネ＆マネキンとの関係は？』

    宮城テレビ放送　OH！バンデス（第4部） 2021/7/30放送

    2021/07/30

    Type: TV or radio program

  7. 地面効果翼機「AIRFISH 8」地面効果の説明監修 Myself

    日本テレビ放送網（株）　世界まる見え！テレビ特捜部

    2020/11/23

    Type: TV or radio program

  8. 航空技術部門へのメッセージ Myself

    JAXA航空マガジン FLIGHT PATH No.24　p.p.8-9

    2019/12

    Type: Promotional material

  9. JAXA・東北大と連携 PDエアロ無人機で宇宙へ

    日刊工業新聞

    2018/12/26

    Type: Newspaper, magazine

  10. なんでも未来ずかん どうなる？ こうなる！ ボクらの未来へ出発だ！！

    講談社　MISORA掲載

    2017/11/30

    Type: Other

    More details Close

    製品名 なんでも未来ずかん どうなる？ こうなる！ ボクらの未来へ出発だ！！ 著者名 監：川口 友万 絵：川崎 タカオ 絵：田川 秀樹 絵：ハマダ ミノル 発売日 2017年11月30日 価格 定価：1,870円（本体1,700円） ISBN 978-4-06-220860-4 判型 AB ページ数 64ページ

  11. Optimizing The MRJ's Aerodynamics Through Advanced Design

    Mitsubishi Aircraft Corporation Website

    2017/09/18

    Type: Internet

  12. ドローンの魅力と近未来技術としての活動

    河北新報

    2017/01/30

  13. 仙台空港活性化案について

    宮城テレビ放送

    2016/12/27

    Type: TV or radio program

  14. 【シリーズ】モノづくりにおけるデータサイエンス ③多目的設計探査の考え方 Myself

    日科技連　日科技連機関紙「日科技連ニュース」2016年11月号

    2016/11/10

    Type: Promotional material

  15. MISORA

    図書館教育ニュース　図書館教育ニュース

    2016/06/18

  16. 「アサヒスーパードライ」タンブラーの設計

    2016/03/07

    Type: Newspaper, magazine

  17. ビッグデータ時代の設計手法, 多目的設計探査（MODE）の考え方 Myself

    日経テクノロジー　日経テクノロジー

    2016/02/13

    Type: Newspaper, magazine

  18. トライアルユース“風速10m～15m で飛ばない 絵灯籠の検討”実験

    読売新聞

    2013/12/24

    Type: Newspaper, magazine

  19. トライアルユース“風速10m～15m で飛ばない 絵灯籠の検討”実験

    河北新報

    2013/12/18

    Type: Newspaper, magazine

  20. 次世代流動実験センター開催・共用促進事業体験学習会

    河北新報

    2013/12/06

    Type: Newspaper, magazine

  21. 千葉県立現代産業科学館特別展「飛べ！大空に－とばすワザ とぶフシギ－」

    千葉県立現代産業科学館特別展

    2013/11/09

    Type: Other

  22. 静かで燃費もいい超音速旅客機驚きのデザイン

    Newsweek旅行とビジネスを変える日本版エアライン新常識

    2013/07/09

    Type: Newspaper, magazine

  23. 河北新報朝刊掲載コラム「科学の泉」衝撃波の科学と応用⑥ 五十肩の治療にも活用 Myself

    河北新報

    2013/07/07

    Type: Newspaper, magazine

  24. 河北新報朝刊掲載コラム「科学の泉」衝撃波の科学と応用⑤ 超音速機の課題は騒音対策 Myself

    河北新報

    2013/07/06

    Type: Newspaper, magazine

  25. 河北新報朝刊掲載コラム「科学の泉」衝撃波の科学と応用④ 技術的達成度高いコンコルド Myself

    河北新報

    2013/07/05

    Type: Newspaper, magazine

  26. 河北新報朝刊掲載コラム「科学の泉」衝撃波の科学と応用③ 雷、花火の音も同じ原理 Myself

    河北新報

    2013/07/04

    Type: Newspaper, magazine

  27. 河北新報朝刊掲載コラム「科学の泉」衝撃波の科学と応用② １万度を超える大気圏突入 Myself

    河北新報

    2013/07/03

    Type: Newspaper, magazine

  28. 河北新報朝刊掲載コラム「科学の泉」衝撃波の科学と応用① 圧力がかかった空気の波 Myself

    河北新報

    2013/07/02

    Type: Newspaper, magazine

  29. 超音速の「複葉機」案

    読売新聞夕刊10面

    2013/06/20

    Type: Newspaper, magazine

  30. 打倒ソニックブーム！超音速旅客機の挑戦

    サイエンスZERO Ｅテレ

    2013/05/05

    Type: TV or radio program

  31. 岡山での軍用機低空飛行が原因とみられる民家全壊事故に関する検証取材

    フジテレビ　フジテレビスーパーニュース

    2011/03/11

    Type: TV or radio program

  32. 岡山での軍用機低空飛行が原因とみられる民家全壊事故に関する検証取材

    フジテレビ　フジテレビとくだね

    2011/03/08

    Type: TV or radio program

  33. インターネットテレビ番組COLUMBUS CHANNEL

    2010/11

    Type: Newspaper, magazine

    More details Close

    研究紹介

  34. 2枚翼 超音速機で復活へ

    読売新聞サイエンス面10頁

    2009/07/13

    Type: Newspaper, magazine

  35. 複葉で新型超音速機。東北大教授ら研究中。70年前の理論活用 騒音の元、衝撃波7割減。

    神戸新聞

    2009/03/28

    Type: Newspaper, magazine

  36. 複葉の超音速機開発へ。東北大衝撃波騒音70％減、燃費も向上。

    熊本日日新聞

    2009/03/25

    Type: Newspaper, magazine

  37. 複葉翼で新型超音速機。大林・東北大教授らモデル設計。衝撃波ごう音7割減。

    福井新聞

    2009/03/23

    Type: Newspaper, magazine

  38. 複葉で新型超音速機。衝撃波騒音70％減。東北大がモデル完成。

    山陰新聞

    2009/03/17

    Type: Newspaper, magazine

  39. 複葉翼で新型超音速機。厄介な衝撃波70％減。東北大がモデル設計。

    徳島新聞 夕刊

    2009/03/16

    Type: Newspaper, magazine

  40. 複葉の超音速機開発加速。模型機、11年飛行目指す。

    大分合同新聞 夕刊

    2009/03/16

    Type: Newspaper, magazine

  41. 新型は複葉で。東北大流体科学研究所、衝撃波大幅に低減開発へモデル完成。

    静岡新聞

    2009/03/15

    Type: Newspaper, magazine

  42. 「MISORA」複葉の新超音速機開発へ。東北大がモデル設計。厄介な衝撃波、70％減。

    下野新聞

    2009/03/13

    Type: Newspaper, magazine

  43. 複葉機で超音速飛行。東北大が新型モデル設計。厄介な衝撃波70％減。

    山陰中央新報

    2009/03/12

    Type: Newspaper, magazine

  44. 複葉で新型超音速機。東北大がモデル設計 衝撃波70％減。

    埼玉新聞　埼玉新聞

    2009/03/11

    Type: Newspaper, magazine

  45. 複葉で新型超音速機。東北大流体力学研がモデル設計。

    中部経済新聞　中部経済新聞

    2009/03/09

    Type: Newspaper, magazine

  46. 宇宙航空の最先端を知る 果てしない探究心 未知の世界に挑戦 東北大仙台セミナー そらからの贈り物

    河北新報　河北新報

    2009/01/20

    Type: Newspaper, magazine

  47. 東北大サイエンスカフェから ごう音軽減し実用へ

    河北新報　河北新報

    2008/12/19

    Type: Newspaper, magazine

  48. 機械が“突然変異”するとき

    科学雑誌Newton　科学雑誌Newton

    2008/12/14

    Type: Newspaper, magazine

  49. 近づく宇宙 育て好奇心 東北大がセミナー複葉翼でサイレント超音速機を作る

    河北新報　河北新報

    2008/12/14

    Type: Newspaper, magazine

  50. 衝撃波消し夢の空へ

    読売新聞　読売新聞宮城版

    2007/12/30

    Type: Newspaper, magazine

  51. 超音速複葉旅客機MISORA

    科学雑誌Newton　科学雑誌Newton

    2007/12

    Type: Newspaper, magazine

  52. 衝撃波無し超音速旅客機

    朝日新聞　朝日新聞宮城版

    2007/11/15

    Type: Newspaper, magazine

  53. 「東北大学の新世紀」環境にやさしい超音速への挑戦！

    東日本放送　東日本放送

    2007/09/14

    Type: TV or radio program

  54. 超音速の「複葉機」 騒音を8割減らす

    日本経済新聞　日本経済新聞

    2007/09/14

    Type: Newspaper, magazine

  55. 室蘭工大で特別講演

    室蘭民報　室蘭民報 夕刊

    2007/06/14

    Type: Newspaper, magazine

  56. サイレント超音速旅客機コンセプト「MISORA（みそら）」(MItegated SOnic-boom Research Airplane)

    日本航空宇宙学会誌 Vol.55 No.637

    2007/02

    Type: Other

  57. 安全を目指せ 航空新技術の挑戦

    NHK教育「サイエンスZERO」第141回　「安全を目指せ 航空新技術の挑戦」にてJAXAと共同研究中の晴天乱気流の計算結果が放映された。

    2006/10/14

    Type: TV or radio program

  58. 未来の超音速旅客機をめざして

    2006/07/24

    Type: TV or radio program

    More details Close

    FNN仙台放送スーパーニュース 「シリーズ東北大学100年物語」6回目 「未来の超音速旅客機をめざして」にて複葉超音速飛行の研究が放映された。

  59. 日本発新型旅客機へ

    東北大学学生新聞　超音速旅客機の騒音や衝撃波を大幅に軽減できる「複葉翼」の理論確率

    2005/11/04

    Type: Newspaper, magazine

  60. 「複葉翼」で課題克服 次世代理論の確立

    河北新報　超音速旅客機の騒音や衝撃波低減の理論確立

    2005/09/23

    Type: Newspaper, magazine

  61. 東北大流体研・宇宙開発機構 共同研究で協力協定

    読売新聞

    2004/06/18

    Type: Newspaper, magazine

  62. 流体科学研究所・宇宙開発機構 ロケット技術向上へ連携１７日調印

    河北新報

    2004/06/15

Show all Show first 5

Other 29

  1. 航空機の舵面LCOに関する研究

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    遷音速における非線形空気力とガタ等の構造非線形の双方を考慮可能な解析ツールを開発する。

  2. ソニックブーム長距離非線形伝播音響解析ツール開発およびソニックブーム波形に対する大気乱流効果に関する研究（その１）（その２）（その３）

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    本委託研究は，宇宙航空研究開発機構 航空プログラムグループが進める静粛超音速機技術の研究開発で必要となる，ソニックブーム推算技術のうち機体近傍場の圧力波形を高精度に推算する技術の獲得を目的とし，格子細分化に基づく解適合格子法の開発を行う．

  3. 局所気象シミュレーションを利用した乱気流検知システムの高性能化

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    計測融合シミュレーションによるオンラインの観測データ補正技術の開発で、オフラインでＣＦＤによる局所気象シミュレーションを用いた検証を行う。１年目は検討、２年目はアルゴリズム試作を行う。

  4. 計測融合シミュレーションを利用したドップラーライダーの信号処理改善

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    観測データ補正プログラムを開発して、飛行実験データを用いて改善効果を評価する。

  5. 実験/計算融合によるソニックブーム推定方法の高精度化

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    波形パラメータ法に対して、実験と計算による近傍場波形の推定精度の検証、気象データと計算による大気乱れの影響の検証を行い、ソニックブーム推定精度の高精度化を試みる。

  6. 乱流遷移基礎研究

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    単翼周りの流れを対象に実験的、数値的に乱流遷移現象を解析する.

  7. 衝撃波を相殺する複葉型超音速翼の空力設計における実験・計算融合

    More details Close

    複葉型超音速２次元翼の衝撃波干渉ならびに不始動発生条件を実験・実験結果とCFD計算結果の比較によるデータ取得

  8. 蒸気タービン翼列の多目的最適化（１）（２）（３）

    More details Close

    蒸気タービン翼列を対象とした流体解析技術，および，流体解析によるタービン翼列性能の把握とそれを基にしたタービン翼列形状や動作条件の多目的最適化技術．

  9. 多目的ロバスト設計に関する研究

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    多目的ロバスト設計に関する研究

  10. 超音波計測連成解析による超高精度生体機能計測システム

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    超音波計測連成解析による超高精度生体機能計測システム開発

  11. 流体解析を用いた形状最適化

    More details Close

    ＧＡによる多目的最適化技術

  12. ＣＦＤによる大気局所シミュレーションコードの開発

    More details Close

    ＣＦＤによる大気局所シミュレーションコードの開発

  13. 高精度近似関数による多目的最適化に関する研究

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    高精度近似関数による多目的最適化に関する研究

  14. リフティングボディ型再突入機形状の遷音速特性の改善

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    リフティングボディ型再突入機形状の遷音速特性の数値シミュレーションと空力最適化

  15. ディーゼル機関の燃焼室形状最適化技術の開発

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    ディーゼル機関の燃焼室形状最適化技術の開発

  16. 多目的最適化アルゴリズムの研究・開発

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    領域適応型遺伝的アルゴリズムの開発と実装

  17. 航空機形状の最適化に関する研究(１)(２)(３)(４)(５)(６)

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    リージョナルジェット機の構造と空力を考慮した多分野融合最適設計法の開発

  18. 高速ネットワークを用いた航空機安全環境・飛行制御統合シミュレーション法の開発

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    SuperSINETを用いた航空機安全環境・飛行制御統合シミュレーション法の開発

  19. 進化的アルゴリズムによる流体機械最適化の研究

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    進化的アルゴリズムによる流体機械最適化の研究

  20. CFDによる航空宇宙機の最適化手法の開発と応用に関する研究

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    CFDによる航空宇宙機の最適化手法の開発と超音速機への応用に関する研究

  21. ＧＡを利用した吸排気系形状最適化技術の開発

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    自動車エンジンの高出力化と環境適合性を両立させる多目的最適設計法の開発

  22. 宇宙推進用エンジンに関する基礎現象の解明と性能向上に関する研究

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    宇宙推進用エンジンに関する基礎現象の解明と性能向上に関する研究

  23. ロータ用非定常CFDコードの開発

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    ヘリコプターローター周りの流れのシミュレーションコードの開発

  24. CFDによる航空宇宙機の空力設計手法の開発と応用に関する研究

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    数値流体力学手法の高度化と最適設計・逆設計法の開発

  25. 生物の情報処理機能に基づく大規模システム最適化

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    遺伝的アルゴリズムによる最適設計・逆設計法の開発

  26. 遺伝的アルゴリズムの大規模並列計算

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    遺伝的アルゴリズムによる最適設計・逆設計法の開発

  27. CFDの高度化と空力最適設計法の開発

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    CFDの高度化と空力最適設計法の開発と航空機設計の適用

  28. CFDの高度化と空力最適設計法の開発

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    数値流体力学手法の高度化と最適設計・逆設計法の開発

  29. CFDによる航空宇宙機の空力設計手法及びCFD計算手法に関する研究

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    数値流体力学手法の高度化と最適設計・逆設計法の開発

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