TOHOKU UNIVERSITY Researchers

Details of the Researcher

Home

日本語 English

Satoru Yamamoto

Section

Graduate School of Information Sciences

Job title

Professor

Degree

工学博士（東北大学）

researchmap

https://researchmap.jp/read0168329

J-GLOBAL ID

200901081484338963

Research History 6

2004/10 - Present

東北大学大学院情報科学研究科　教授
1992/12 - 2004/09

Tohoku University　Graduate School of Engineering, Department of Aerospace Engineering
1992/04 - 1993/01

スタンフォード大学航空宇宙学科　文部省在外研究員(若手枠）客員研究員
1991/04 - 1992/11

Tohoku University
1989/04 - 1991/03

Tohoku University
1987/04 - 1989/03

東北大学　日本学術振興会特別研究員

Show all Show first 5

Education 2

Tohoku University　Graduate School of Engineering　Graduated from Doctor course of Mechanical Engineering

- 1989/03
Tohoku University　Faculty of Engineering　Graduate from Department of Mechanical Engineering

- 1984/03

Committee Memberships 75

日本ガスタービン学会　代表執行理事

2022/04 - 2024/03
日本機械学会　流体工学部門・部門長

2021/04 - 2022/03
日本学術振興会　特別研究員等審査専門委員

2017/08 - 2019/07
国際電気基準会議（IEC）　TC5日本委員会委員

2017/04 - 2019/03
日本ガスタービン学会　執行理事

2017/04 - 2019/03
(財) 高度情報科学技術研究機構HPCI産業利用WG　委員

2013/04 - 2018/03
日本流体力学会　第２３回数値流体力学シンポジウム実行委員長

2009/04 - 2010/03
日本機械学会　論文集Ｂ１編編修委員会委員長

2009/04 - 2010/03
International Conference on Fluid Dynamics　International Scientific Committee Member

2010/04 - Present
日本機械学会　流体工学部門副部門長

2020/04 - 2021/03
日本機械学会　流体工学部門技術委員会委員長

2019/04 - 2020/03
日本機械学会　東北支部庶務幹事

2018/04 - 2020/03
日本機械学会　東北支部商議員

2018/04 - 2020/03
日本機械学会　東北支部会計幹事

2015/04 - 2017/03
日本機械学会　東北支部商議員

2012/04 - 2017/03
日本機械学会賞委員会　委員

2012/04 - 2013/04
日本機械学会賞委員会　委員

2012/04 - 2013/04
日本ガスタービン学会調査研究委員会　委員

2011/04 - 2013/04
日本ガスタービン学会　理事

2009/04 - 2011/03
日本ガスタービン学会　評議員

2004/04 - 2011/03
日本機械学会　計算力学部門運営委員

2007/04 - 2010/03
日本機械学会　計算力学部門年次大会担当委員会委員長

2008/04 - 2009/03
日本機械学会　論文集Ｂ１編編修委員会副委員長

2008/04 - 2009/03
日本機械学会　計算力学部門年次大会担当委員会委員長

2008/04 - 2009/03
日本機械学会　論文集Ｂ１編編修委員会副委員長

2008/04 - 2009/03
日本機械学会　東北支部商議員

2005/04 - 2008/03
青葉工業会　常任理事

2005/04 - 2008/03
日本機械学会　東北支部商議員

2005/04 - 2008/03
青葉工業会　常任理事

2005/04 - 2008/03
日本機械学会　論文校閲委員

1995/04 - 2008/03
日本機械学会　論文校閲委員

1995/04 - 2008/03
Computational Fluid Dynamics Journal　Editorial Advisory Board

1998/04 - 2006/03
Computational Fluid Dynamics Journal　Editorial Advisory Board

1998/04 - 2006/03
日本機械学会　流体工学部門技術委員会 WG 委員

1998/04 - 2004/03
日本機械学会　流体工学部門技術委員会 WG 委員

1998/04 - 2004/03
日本流体力学会　数値流体力学シンポジウム実行委員

2002/12 - 2003/12
日本流体力学会　数値流体力学シンポジウム実行委員

2002/12 - 2003/12
東北地域総合エネルギー対策推進会議　委員

2001/04 - 2002/03
東北地域総合エネルギー対策推進会議　委員

2001/04 - 2002/03
日本航空宇宙学会　北部支部講演会実行委員

1999/03 - 2001/03
日本航空宇宙学会　北部支部講演会実行委員

1999/03 - 2001/03
日本航空宇宙学会　北部支部幹事

1998/04 - 2001/03
日本航空宇宙学会　北部支部幹事

1998/04 - 2001/03
日本航空宇宙学会　会誌編集委員

1996/04 - 1998/03
日本航空宇宙学会　会誌編集委員

1996/04 - 1998/03
日本機械学会　研究協力部会「RC140 混相流動解析プログラムの高度化と応用に関する研究分科会」研究者側委員

1996/07 - 1997/06
日本機械学会　研究協力部会「RC140 混相流動解析プログラムの高度化と応用に関する研究分科会」研究者側委員

1996/07 - 1997/06
日本機械学会　流体工学部門技術委員会委員

1995/04 - 1996/03
日本機械学会　流体工学部門技術委員会委員

1995/04 - 1996/03
日本航空宇宙学会　北部支部幹事

1993/04 - 1996/03
日本航空宇宙学会　北部支部幹事

1993/04 - 1996/03
日本航空宇宙学会　北部支部講演会実行委員会委員

1994/03 - 1996/02
日本航空宇宙学会　北部支部講演会実行委員会委員

1994/03 - 1996/02
日本機械学会　究協力部会分科会「RC124 流れ解析データベース研究分科会」委員

1993/07 - 1995/06
日本機械学会　究協力部会分科会「RC124 流れ解析データベース研究分科会」委員

1993/07 - 1995/06
日本機械学会　流体工学部門広報委員会委員

1993/04 - 1995/03
日本機械学会　流体工学部門広報委員会委員

1993/04 - 1995/03
日本機械学会　流体工学部門運営委員

2011/04 -
日本機械学会　流体工学部門運営委員

2011/04 -
日本機械学会　流体工学部門講演会実行委員会幹事

2001/10 -
日本機械学会　流体工学部門講演会実行委員会幹事

2001/10 -
日本機械学会　創立 100 周年記念東北支部記念事業委員会委員

1997/10 -
日本機械学会　創立 100 周年記念東北支部記念事業委員会委員

1997/10 -
Int. Symp. on Mathematical Modeling of Turbulent Flows　Steering Committee Member

1995/12 -
乱流の数理モデルに関する国際シンポジウム　組織委員

1995/12 -
日本航空宇宙学会　北部支部主催一般市民向け第 3 回科学講演会実行委員会委員長

1995/10 -
日本航空宇宙学会　北部支部主催一般市民向け第 3 回科学講演会実行委員会委員長

1995/10 -
The Third JSME-KSME Fluids Engineering Conference　Excecutive Committee Member

1994/07 -
第３回JSME-KSME流体工学会議　実行委員

1994/07 -
日本機械学会　東北支部第 29 期総会 . 講演会実行委員会委員

1994/03 -
日本機械学会　東北支部第 29 期総会 . 講演会実行委員会委員

1994/03 -
The 5th Int. Symposium on Computational Fluid Dynamics-Sendai　Executive Committee Member

1993/08 -
第５回国際数値流体力学会議　実行委員

1993/08 -
日本流体力学会　第 25 回乱流シンポジウム実行委員会委員

1993/07 -
日本流体力学会　第 25 回乱流シンポジウム実行委員会委員

1993/07 -

Show all ︎Show first 5

Professional Memberships 4

日本工学アカデミー
日本航空宇宙学会
日本ガスタービン学会
日本機械学会

Research Interests 7

Computational Fluid Dynamics (CFD)
Multiphysics CFD
Mathematical Modeling and Computation
Numerical Analysis
Supercritical Fluids
Gas Turbine
Steam Turbine

Research Areas 3

Aerospace, marine, and maritime Engineering / Aerospace engineering /
Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Thermal engineering /
Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Fluid engineering /

Awards 9

日本機械学会流体工学部門賞

2023/07　日本機械学会
日本ガスタービン学会功労賞

2022/11　日本ガスタービン学会
Best Paper Award 2018

2020/03　IMechE　Results of the International Wet Steam Modeling Project, Proc. IMechE, Part A, Journal of Power and Energy, March, (2018)
平成３０年度特別研究員等審査会専門委員表彰

2019/09　日本学術振興会
Advanves in Engineering, Key Scientific Article

2018/09　Advanves in Engineering　Effect of inlet Wetness on Transonic Wet-steam and Moist-air Flows in Turbomachinery published in International Journal of Heat and Mass Transfer, 19(2018), 720-732
Advances in Engineering, Key Scientific Article

2015/04　Advances in Engineering　Thermophysical Flow Simulations of Rapid Expansion of Supercritical Solutions (RESS) published in Journal of Supercritical Fluids, 97(2015), 192-201
計算力学技術者(CAE技術者)上級アナリスト

2009/09　日本機械学会
日本ガスタービン学会賞奨励賞(The GTSJ Prize, the incentive prize)

1996/04　日本ガスタービン学会(Gas Turbine Society of Japan)
日本機械学会賞奨励賞(The JSME Prize, the incentive prize)

1990/03　日本機械学会(Japan Society of Mechanical Engineers

Show all ︎Show 5

Papers 180

High-fidelity large eddy simulation of transonic wet steam flows through a steam turbine cascade Peer-reviewed

Yasuharu Hagita, Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto

International Journal of Heat and Mass Transfer　242　127415-127415　2025/12
Publisher: Elsevier BV
DOI： 10.1016/j.ijheatmasstransfer.2025.127415 　

ISSN： 0017-9310
Wet-Steam Flow Simulation With Coarse Water Droplets Through a Turbine Cascade Based on Eulerian-Eulerian Method Peer-reviewed

Takashi Furusawa, Kazushi Morikita, Hironori Miyazawa, Satoru Yamamoto, Yasuhiro Sasao, Satoshi Miyake, Soichiro Tabata

Proc. ASME 2025 Turbo Expo　GT2025-151602　1-10　2025/06
Surge and Rotating Stall Detection for Axial Compressor Flow Based on Self-Organizing Map Peer-reviewed

Hironori Miyazawa, Yoshihiro Kitamura, Takashi Furusawa, Satoru Yamamoto, Kentaro Nakayama, Naoyuki Niwa, Naoki Kanazawa

Proc. ASME 2025 Turbo Expo　GT2025-152088　1-13　2025/06
Self-organization of Unsteady Full-Annulus Flows in A Gas Turbine Compressor under Operating Conditions Peer-reviewed

GT2023-101937　1-11　2023/06
Modified heat transfer correction function for modeling multiphase condensing flows in transonic regime Peer-reviewed

Piotr Wiśniewski, Sławomir Dykas, Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto

International Journal of Heat and Mass Transfer　201　123597-123597　2023/02
Publisher: Elsevier BV
DOI： 10.1016/j.ijheatmasstransfer.2022.123597 　

ISSN： 0017-9310
Numerical Modeling of Water Droplets in Compressible Two-Phase Flows Based on Eulerian-Eulerian Method Peer-reviewed

Takashi Furusawa, Yasuhiro Sasao, Ryo Takata, Hironori Miyazawa, Satoru Yamamoto

Proceedings of ASME 2022 Turbo Expo　GT2022-81246　1-9　2022/06

DOI： 10.1115/GT2022-81246 　
The Effect of Partial-Load Operation on a Gas Turbine Compressor of an Advanced Combined Cycle Power Plant Peer-reviewed

Yasuharu Hagita, Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto, Koichi Yonezawa, Shuichi Umezawa, Shuichi Ohmori, Takeshi Suzuki

Proceedings of ASME 2022 Turbo Expo　GT2022-80251　1-12　2022/06

DOI： 10.1115/GT2022-80251 　
Double-flux model for supercritical multicomponent flows at low Mach numbers with preconditioning method Peer-reviewed

Shuto Yatsuyanagi, Takashi Furusawa, Satoru Yamamoto

Journal of Computational Physics　458　111091-111091　2022/06
Publisher: Elsevier BV
DOI： 10.1016/j.jcp.2022.111091 　

ISSN： 0021-9991
産業用ガスタービン圧縮機静動翼列における不安定流動の非定常全周シミュレーション

宮澤弘法, 古澤卓, 山本悟

第36回数値流体力学シンポジウム予稿集　1　2　2022
非一様流入条件下で作動する軸流圧縮機静動翼列全周の非定常流動シミュレーション

宮澤弘法, 古澤卓, 山本悟

日本機械学会第100期流体工学部門講演会予稿集　1　4　2022
Detection of Machinery Failure Signs From Big Time-Series Data Obtained by Flow Simulation of Intermediate-Pressure Steam Turbines Peer-reviewed

Kazuhiko Komatsu, Hironori Miyazawa, Cheng Yiran, Masayuki Sato, Takashi Furusawa, Satoru Yamamoto, Hiroaki Kobayashi

Journal of Engineering for Gas Turbines and Power　144　(1)　2022/01/01
Publisher: ASME International
DOI： 10.1115/1.4052142 　

ISSN： 0742-4795

eISSN： 1528-8919
Numerical study of supercritical octane flows with multicomponent effects by pyrolysis Peer-reviewed

Shuto Yatsuyanagi, Takashi Furusawa, Hironori Miyazawa, Satoru Yamamoto, Takuo Onodera, Sadatake Tomioka

International Journal of Thermal Sciences　171　107193-107193　2022/01
Publisher: Elsevier BV
DOI： 10.1016/j.ijthermalsci.2021.107193 　

ISSN： 1290-0729
Effects of wetness and humidity on transonic compressor of gas turbine Peer-reviewed

Satoru Yamamoto, Koki Araki, Shota Moriguchi, Hironori Miyazawa, Takashi Furusawa, Koichi Yonezawa, Shuichi Umezawa, Shuichi Ohmori, Takeshi Suzuki

International Journal of Heat and Mass Transfer　178　121649-121649　2021/10
Publisher: Elsevier BV
DOI： 10.1016/j.ijheatmasstransfer.2021.121649 　

ISSN： 0017-9310
Numerical Investigation of Supercritical n-Dodecane Flows in a Heated Circular Pipe with Thermal Cracking Peer-reviewed

Shuto Yatsuyanagi, Takashi Furusawa, Satoru Yamamoto, Takuo Onodera, Sadatake Tomioka

Proceedings of ASME Fluids Engineering Division Summer Meeting (FEDSM2021), Virtual Conference　FEDSM2021-65261　1-9　2021/08/10
Turbulent Flow Simulation of Supercritical Hydrothermal Synthesis in T-Shaped Channel Peer-reviewed

Takashi Furusawa, Kenta Matsui, Shuto Yatsuyanagi, Satoru Yamamoto, Akira Yoko, Tadafumi Adschiri

Proceedings of ASME Fluids Engineering Division Summer Meeting (FEDSM2021), Virtual Conference　FEDSM2021-66023　1-7　2021/08/10
Publisher: American Society of Mechanical Engineers
DOI： 10.1115/fedsm2021-66023 　

More details Close

<title>Abstract</title> Turbulent mixing flows of supercritical water and a metal-salt solution were investigated using Reynolds-averaged Navier–Stokes (RANS) simulations. The mass conservation equations for metal-salt and metal-oxide in an aqueous solution, which were coupled with Navier–Stokes equations and the Shear Stress Transport (SST) turbulence model, were solved by considering production by the hydrothermal reaction. The reaction rate in the numerical simulation was interpolated linearly using the experimental data. The mixing flows in a T-shaped channel for various Reynolds numbers were simulated numerically. Fluid mixing causes a hydrothermal reaction in a high temperature region. In a situation with a low temperature and low Reynolds number, the mixing became a steady state, and the metal oxide was generated along the channel wall. For a high Reynolds number, the periodic vortexes were observed at the mixing point and the fluid temperature increased rapidly. A numerical simulation reproduced the apparent reaction rate of the experimental measurements, except for the low Reynolds number case. The time-averaged temperature distributions indicated that the increasing temperature rate in the mixing reactor depends on the inlet supercritical water temperature, which affects the distribution of the concentration of metal oxide. If the turbulence effects were ignored in low-temperature instances, the apparent reaction rate was estimated to be quite low. The turbulent diffusivity and thermal conductivity crucially affected the conversion rate, especially for conditions with a low Reynolds number.
Detection of Machinery Failure Signs from Big Time-series Data Obtained by Flow Simulation of Intermediate-pressure Turbines Peer-reviewed

Kazuhiro Komatsu, Hironori Miyazawa, Cheng Yiran, Masayuki Sato, Takashi Furusawa, Satoru Yamamoto, Hiroaki Kobayashi

Proceedings of the ASME Turbo Expo　GT2021-58698　1-11　2021/06

DOI： 10.1115/GT2021-58698 　
Large eddy simulation of a linear turbine cascade with a trailing edge cutback Peer-reviewed

Shota Moriguchi, Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto

Energy　220　119694-119694　2021/04
Publisher: Elsevier BV
DOI： 10.1016/j.energy.2020.119694 　

ISSN： 0360-5442
Unsteady flow simulation of industrial gas turbine compressor under start-up operation

Hironori Miyazawa, Koki Araki, Takashi Furusawa, Satoru Yamamoto, Shuichi Umezawa, Koichi Yonezawa, Shuichi Ohmori, Takeshi Suzuki

Proceedings of the International Conference on Power Engineering 2021, ICOPE 2021　2021
Numerical approaches for moist air condensing flows modelling in the transonic regime Peer-reviewed

P. Wiśniewski, S. Dykas, S. Yamamoto, B. Pritz

International Journal of Heat and Mass Transfer　162　120392-120392　2020/12
Publisher: Elsevier BV
DOI： 10.1016/j.ijheatmasstransfer.2020.120392 　

ISSN： 0017-9310
Wetness Measurement and Droplet Transport Analysis in Actual Steam Test on A Scaled Low Pressure Turbine Peer-reviewed

Yasuhiro Sasao, Kiyoshi Segawa, Takeshi Kudo, Ryo Takata, Masaki Osako, Satoru Yamamoto

Proceedings of ASME 2020 Turbo Expo　GT2020-16117　1-12　2020/09
Unsteady Flow Simulation through Stator-Rotor Blade Rows in Intermediate-Pressure Steam Turbines with Cutback Blades Peer-reviewed

Hironori Miyazawa, Akihiro Uemura, Takashi Furusawa, Satoru Yamamoto, Koichi Yonezawa, Shuichi Umezawa

Proceedings of ASME 2020 Turbo Expo　GT2020-14937　1-12　2020/09

DOI： 10.1115/GT2020-14937 　
Importance of Air Humidity and Contaminations in the Internal and External Transonic Flows Peer-reviewed

P. Wiśniewski, S. Dykas, S. Yamamoto

Energies　13　(12)　3153-3153　2020/06/17
Publisher: MDPI AG
DOI： 10.3390/en13123153 　

eISSN： 1996-1073

More details Close

The paper presents mathematical modelling of steam condensation in the atmospheric air transonic flows. A single-fluid model was employed. The model was validated against the in-house experimental studies of internal flow in nozzles and against benchmark tests available in literature i.e., RAE2822 transonic airfoil. The impact of air relative humidity on the condensation process under transonic flow conditions was examined. The paper shows that the impact of the condensation process in air transonic flow is non-negligible and has to be taken under consideration in flow simulations. The presence of air contaminants in form of small particles was considered too. Their crucial role in the change of the transonic flow structure was numerically confirmed.
A numerical and analytical coupling method for predicting the performance of intermediate-pressure steam turbines in operation Peer-reviewed

Satoru Yamamoto, Akihiro Uemura, Hironori Miyazawa, Takashi Furusawa, Koichi Yonezawa, Shuichi Umezawa, Shuichi Ohmori, Takeshi Suzuki

Energy　198　117380-117380　2020/05
Publisher: Elsevier BV
DOI： 10.1016/j.energy.2020.117380 　

ISSN： 0360-5442
Simulation of unsteady flows through three-stage middle pressure steam turbine in operation Peer-reviewed

Akihiro UEMURA, Hironori MIYAZAWA, Takashi FURUSAWA, Satoru YAMAMOTO, Koichi YONEZAWA, Shuichi UMEZAWA, Shuichi OHMORI

Mechanical Engineering Journal　884-889　2020
Publisher: Japan Society of Mechanical Engineers
DOI： 10.1299/mej.20-00068 　

eISSN： 2187-9745
Numerical Simulation of Unsteady Moist-air Flows through Whole-annulus Rotor Blade Rows in Transonic Compressor Peer-reviewed

Shota Moriguchi, Takuro Endo, Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto

Proc. ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference　5　(AJKFluids2019-4782)　1-9　2019/07

DOI： 10.1115/AJKFluids2019-4782 　
Numerical Simulation of Supercritical Octane Flows in a Heated Circular Tube with Simple Thermal Cracking Model Peer-reviewed

Takashi Furusawa, Noriyuki Taki, Shuto Yatsuyanagi, Satoru Yamamoto, Takuto Miyaura, Sadatake Tomioka

(AJKFluids2019-4797)　1-8　2019/07
Optical Couarse Droplet Measurement and Wet Loss Analysis on the Wet Air Flow Through the Subsonic Blade Cascade Channel Peer-reviewed

Yasuhiro Sasao, Ryo Takata, Satoshi Miyake, Soichiro Tabata, Satoru Yamamoto

Proc. ASME 2019 Turbo Expo　(GT2019-91928)　1-12　2019/06
Effect of Blade Secular Change on Unsteady Flows in Middle Pressure First-Stage Steam Turbines Peer-reviewed

Akihiro Uemura, Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto, Koichi Yonezawa, Shuichi Umezawa

Proc. ASME 2019 Turbo Expo　8　(GT2019-90644)　1-9　2019/06

DOI： 10.1115/GT2019-90644 　
Wetness Effect on Transonic Moist-air Flow through a Compressor Rotor Peer-reviewed

Shota Moriguchi, Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto

Proc. ASME 2018 5th-Joint US-European Fluid Engineering Division Summer Meeting　3　(FEDSM2018-83422)　1-10　2018/07

DOI： 10.1115/FEDSM2018-83422 　

ISSN： 0888-8116
Numerical Method for Simulating High Pressure CO2 Flows with Nonequilibrium Condensation Peer-reviewed

Takashi Furusawa, Hironori Miyazawa, Satoru Yamamoto

Proc. ASME 2018 Turbo Expo　9　(GT2018-75592)　1-10　2018/06

DOI： 10.1115/GT2018-75592 　
Results of the International Wet Steam Modeling Project International-journal International-coauthorship Peer-reviewed

Jorg Startzmann e, l, cluding, Satoru Yamamoto

Proc. IMechE, Part A, Journal of Power and Energy　1-21　2018/03

DOI： 10.1177/0957650918758779 　
Numerical Investigation of Transonic Supercritical CO2 Flows with Nonequilibrium Condensation in a Laval Nozzle Peer-reviewed

Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto

Proc. 6th International Supercritical CO2 Power Cycles Symposium　2018
Effect of Inlet Wetness on Transonic Wet-steam and Moist-air Flows in Turbomachinery Peer-reviewed

Satoru Yamamoto, Shota Moriguchi, Hironori Miyazawa, Takashi Furusawa

International Journal of Heat and Mass Transfer (Featured online on 'Advances in Engineering':https://advanceseng.com/free-energy-dominates-nucleation-condensation/)　19　720-732　2018

DOI： 10.1016/j.ijheatmasstransfer.2017.12.001 　

ISSN： 0017-9310
FPGA-Based Scalable and Power-Efficient Fluid Simulation using Floating-Point DSP Blocks Peer-reviewed

Kentaro Sano, Satoru Yamamoto

IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS　28　(10)　2823-2837　2017/10

DOI： 10.1109/TPDS.2017.2691770 　

ISSN： 1045-9219

eISSN： 1558-2183
Bandwidth Compression of Floating-Point Numerical Data Streams for FPGA-Based High-Performance Computing Peer-reviewed

Tomohiro Ueno, Kentaro Sano, Satoru Yamamoto

ACM TRANSACTIONS ON RECONFIGURABLE TECHNOLOGY AND SYSTEMS　10　(3)　2017/07

DOI： 10.1145/3053688 　

ISSN： 1936-7406

eISSN： 1936-7414
Numerical analysis of condensation effects on final-stage rotor-blade rows in low-pressure steam turbine Peer-reviewed

Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto

Journal of Fluid Science and Technology　12　(2)　1-12　2017
Publisher: Japan Society of Mechanical Engineers
DOI： 10.1299/jfst.2017jfst0018 　

ISSN： 1880-5558

eISSN： 1880-5558
Mathematical modeling and computation of high-pressure steam condensation in a transonic flow Peer-reviewed

Takashi Furusawa, Satoru Yamamoto

Journal of Fluid Science and Technology　12　(1)　1-11　2017
Publisher: Japan Society of Mechanical Engineers
DOI： 10.1299/jfst.2017jfst0002 　

ISSN： 1880-5558
NUMERICAL METHOD FOR SIMULATING FLOWS OF SUPERCRITICAL CO2 COMPRESSOR WITH NONEQUILIBRIUM CONDENSATION Peer-reviewed

Takashi Furusawa, Hironori Miyazawa, Satoru Yamamoto

PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2016, VOL 9　(GT2016-56431)　331-339　2016

DOI： 10.1115/GT2016-56431 　
Unsteady Force on Multi-stage and Multi-passage Turbine Long Blade Rows Induced by Wet-steam Flows Peer-reviewed

Hironori Miyazawa, Takashi Furusawa, Satoru Yamamoto, Yasuhiro Sasao, Hiroharu Ooyama

PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2016, VOL 8　(GT2016-56360)　1-12　2016

DOI： 10.1115/GT2016-56360 　
Unsteady Force of Wet-steam Flow on Multi-stage Turbine Long Blade Rows Peer-reviewed

Hironori Miyazawa, Toshiki Iwasaki, Satoshi Miyake, Takashi Furusawa, Satoru Yamamoto

Proc. Int. Gas Turbine Congress 2015 Tokyo　1-7　2015/11
Numerical Simulation of Supercritical CO2 Flows in Transonic Turbine and Compressor Peer-reviewed

Takashi Furusawa, Hironori Miyazawa, Satoru Yamamoto

Proc. Int. Gas Turbine Congress 2015 Tokyo　1-6　2015/11
A numerical method applied to forced and natural convection flows over arbitrary geometry Peer-reviewed

Shibo Qi, Takashi Furusawa, Satoru Yamamoto

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER　85　375-389　2015/06

DOI： 10.1016/j.ijheatmasstransfer.2015.02.001 　

ISSN： 0017-9310

eISSN： 1879-2189
Thermophysical flow simulations of rapid expansion of supercritical solutions (RESS) Peer-reviewed

Satoru Yamamoto, Takashi Furusawa

JOURNAL OF SUPERCRITICAL FLUIDS (Featured online on 'Advances in Engineering':https://advanceseng.com/general-engineering/thermophysical-flow-simulations-of-rapid-expansion-of-supercritical-solutions-ress/)　97　192-201　2015/02

DOI： 10.1016/j.supflu.2014.11.016 　

ISSN： 0896-8446

eISSN： 1872-8162
Numerical simulation of three-dimensional supercritical water flows in hydrothermal synthesis reactors with Arbitrary geometry Peer-reviewed

Takashi Furusawa, Shibo Qi, Satoru Yamamoto

ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015　1A　(AJK2015-03096)　1-7　2015
Publisher: American Society of Mechanical Engineers
DOI： 10.1115/AJKFluids2015-03096 　
Unsteady Wet-steam Flows through Low Pressure Turbine Final Three Stages considering Blade Number Peer-reviewed

Satoshi Miyake, Hironori Miyazawa, Satoru Yamamoto, Yasuhiro Sasao, Kazuhiro Momma, Hiroharu Ooyama, Toshihiro Miyawaki

PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2015, VOL 8　(GT2015-42366)　1-11　2015

DOI： 10.1115/GT2015-42366 　
AERODYNAMIC AND STRUCTURAL NUMERICAL INVESTIGATION OF UNSTEADY FLOW EFFECTS ON LAST STAGE BLADES Peer-reviewed

Tadashi Tanuma, Hiroshi Okuda, Gaku Hashimoto, Satoru Yamamoto, Naoki Shibukawa, Kenichi Okuno, Hiroshi Saeki, Tomohiko Tsukuda

PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2015, VOL 8　(GT2015-43848)　1-13　2015

DOI： 10.1115/GT2015-43848 　
EFFECTS OF RETURN CHANNEL WITH SPLITTER VANES ON PERFORMANCE OF MULTISTAGE CENTRIFUGAL COMPRESSOR Peer-reviewed

Manabu Yagi, Takahiro Nishioka, Hiromi Kobayashi, Hideo Nishida, Satoru Yamamoto

ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2015, VOL 2C　(GT2015-43848)　1-10　2015

DOI： 10.1115/GT2015-42442 　
FPGA-based Custom Computing Architecture for Large-Scale Fluid Simulation with Building Cube Method Peer-reviewed

Kentaro Sano, Ryotaro Chiba, Tomoya Ueno, Hayato Suzuki, Ryo Ito, Satoru Yamamoto

Computer Architecture News Special Issue for the proceedings of the International Symposium on Highly-Efficient Accelerators and Reconfigurable Technologies (HEART)　42　(4)　45-50　2014/09/01

DOI： 10.1145/2693714.2693723 　
A new matrix dissipation model for central scheme Peer-reviewed

Xinrong Su, Satoru Yamamoto

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS　74　(7)　494-513　2014/03

DOI： 10.1002/fld.3860 　

ISSN： 0271-2091

eISSN： 1097-0363
Multi-FPGA Accelerator for Scalable Stencil Computation with Constant Memory Bandwidth Peer-reviewed

Kentaro Sano, Yoshiaki Hatsuda, Satoru Yamamoto

IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS　25　(3)　695-705　2014/03

DOI： 10.1109/TPDS.2013.51 　

ISSN： 1045-9219

eISSN： 1558-2183
Numerical Simulation of Supercritical-fluid Flows over Arbitrary Geometry Peer-reviewed

Shibo Qi, Takashi Furusawa, Satoru Yamamoto

Bulletin of JSME, Journal of Fluid Science and Technology　9　(1)　1-16　2014

DOI： 10.1299/jfst.2014jfst0008 　
NUMERICAL INVESTIGATION OF STEAM TURBINE EXHAUST DIFFUSER FLOWS AND THEIR THREE DIMENSIONAL INTERACTION EFFECTS ON LAST STAGE EFFICIENCIES Peer-reviewed

Tadashi Tanuma, Yasuhiro Sasao, Satoru Yamamoto, Yoshiki Niizeki, Naoki Shibukawa, Hiroshi Saeki

PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2014, VOL 1B　(GT2014-26665)　CD-ROM　2014

DOI： 10.1115/GT2014-26665 　
Unsteady Wake and Vortex Interactions in 3-D Steam Turbine Low Pressure Final Three Stages Peer-reviewed

Satoshi Miyake, Itsuro Koda, Satoru Yamamoto, Yasuhiro Sasao, Kazuhiro Momma, Toshihiro Miyawaki, Hiroharu Ooyama

PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2014, VOL 1B　(GT2014-25491)　CD-ROM　2014

DOI： 10.1115/GT2014-25491 　
Analysis of a meshless solver for high Reynolds number flow Peer-reviewed

Xinrong Su, Satoru Yamamoto, Kazuhiro Nakahashi

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS　72　(5)　505-527　2013/06

DOI： 10.1002/fld.3747 　

ISSN： 0271-2091
Comparison of different wall boundary treatments for preconditioning method coupled with building-cube method Peer-reviewed

Shibo Qi, Takashi Furusawa, Satoru Yamamoto, Kazuhiro Nakahashi

Procedia Engineering　61　298-305　2013
Publisher: Elsevier Ltd
DOI： 10.1016/j.proeng.2013.08.019 　

ISSN： 1877-7058
UNSTEADY FLOW EFFECT ON NONEQUILIBRIUM CONDENSATION IN 3-D LOW PRESSURE STEAM TURBINE STAGES Peer-reviewed

Satoshi Miyake, Satoru Yamamoto, Yasuhiro Sasao, Kazuhiro Momma, Toshihiro Miyawaki, Hiroharu Yama

PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2013, VOL 5B　(GT2013-94832)　2013

DOI： 10.1115/GT2013-94832 　
EULERIAN-LAGRANGIAN NUMERICAL SIMULATION OF WET STEAM FLOW THROUGH MULTI-STAGE STEAM TURBINE Peer-reviewed

Yasuhiro Sasao, Satoshi Miyake, Kenji Okazaki, Satoru Yamamoto, Hiroharu Ooyama

PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2013, VOL 5B　(GT2013-95945)　2013

DOI： 10.1115/GT2013-95945 　
AERODYNAMIC INTERACTION EFFECTS FROM UPSTREAM AND DOWNSTREAM ON THE DOWN-FLOW TYPE EXHAUST DIFFUSER PERFORMANCE IN A LOW PRESSURE STEAM TURBINE Peer-reviewed

Tadashi Tanuma, Yasuhiro Sasao, Satoru Yamamoto, Yoshiki Niizeki, Naoki Shibukawa, Hiroshi Saeki

PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2013, VOL 5B　(GT2013-95901)　2013

DOI： 10.1115/GT2013-95901 　
On the accurate prediction of tip vortex: Effect of numerical schemes Peer-reviewed

Xinrong Su, Satoru Yamamoto, Xin Yuan

Proceedings of the ASME Turbo Expo　6　(GT2013-94660)　2013

DOI： 10.1115/GT2013-94660 　
NUMERICAL INVESTIGATION OF EXHAUST DIFFUSER PERFORMANCES IN LOW PRESSURE TURBINE CASINGS Peer-reviewed

Tadashi Tanuma, Yasuhiro Sasao, Satoru Yamamoto, Shinji Takada, Yoshiki Niizeki, Naoki Shibukawa, Hiroshi Saeki

PROCEEDINGS OF THE ASME TURBO EXPO 2011, VOL 7, PTS A-C　(GT2011-45677)　2347-+　2012

DOI： 10.1115/GT2011-45677 　
Simulation of thermal convection based on preconditioning method and BCM Peer-reviewed

Takashi Furusawa, Koutaro Makino, Satoru Yamamoto, Kazuhiro Nakahashi

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B　78　(788)　745-752　2012

DOI： 10.1299/kikaib.78.745 　

ISSN： 0387-5016
Study on flange geometry of steam turbine partial admission stage using unsteady flow analysis Peer-reviewed

Shinji Takada, Yasuhiro Sasao, Satoru Yamamoto, Tadashi Tanuma

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B　78　(788)　753-761　2012

DOI： 10.1299/kikaib.78.753 　

ISSN： 0387-5016
SIMULATION OF UNSTEADY 3-D WET-STEAM FLOWS THROUGH THREE-STAGE STATOR-ROTOR BLADE ROWS WITH EQUILIBRIUM AND NONEQUILIBRIUM CONDENSATIONS Peer-reviewed

Satoshi Miyake, Yasuhiro Sasao, Satoru Yamamoto, Soichiro Tabata, Toshihiro Miyawaki, Hiroharu Ooyama

PROCEEDINGS OF THE ASME TURBO EXPO 2012, VOL 6　(GT2012-68828)　505-513　2012

DOI： 10.1115/GT2012-68828 　
NUMERICAL INVESTIGATION OF THREE-DIMENSIONAL WET STEAM FLOWS IN AN EXHAUST DIFFUSER WITH NON-UNIFORM INLET FLOWS FROM THE TURBINE STAGES IN A STEAM TURBINE Peer-reviewed

Tadashi Tanuma, Yasuhiro Sasao, Satoru Yamamoto, Yoshiki Niizeki, Naoki Shibukawa, Hiroshi Saeki

PROCEEDINGS OF THE ASME TURBO EXPO 2012, VOL 6　(GT2012-69496)　589-602　2012

DOI： 10.1115/GT2012-69496 　
Simulation of Thermophysical Flow in Axisymmetric Nozzle with Expansion Chamber Peer-reviewed

Satoru Yamamoto, Ryo Matsuzawa, Takashi Furusawa

AICHE JOURNAL　57　(10)　2629-2635　2011/10

DOI： 10.1002/aic.12482 　

ISSN： 0001-1541
Domain-Specific Programmable Design of Scalable Streaming-Array for Power-Efficient Stencil Computation Peer-reviewed

Kentaro Sano, Yoshiaki Hatsuda, Satoru Yamamoto

Computer Architecture News Special Issue for the proceedings of the International Workshop on Highly-Efficient Accelerators and Reconfigurable Technologies (HEART)　to be published　2011/09

DOI： 10.1145/2082156.2082168 　
Performance evaluation of FPGA-based custom accelerators for iterative linear-equation solvers

Kentaro Sano, Satoru Yamamoto, Yoshiaki Hatsuda

20th AIAA Computational Fluid Dynamics Conference 2011　2011
Supercritical-Fluid Flow Simulations Across Critical Point Peer-reviewed

Satoru Yamamoto, Takashi Furusawa, Ryo Matsuzawa

COMPUTATIONAL FLUID DYNAMICS 2010　661-667　2011

DOI： 10.1007/978-3-642-17884-9_84 　
Numerical simulation of supercritical water in t-shaped channel across critical point Peer-reviewed

Takashi Furusawa, Satoru Yamamoto

ASME-JSME-KSME 2011 Joint Fluids Engineering Conference, AJK 2011　1　(D)　1055-1060　2011

DOI： 10.1115/AJK2011-01005 　
Numerical simulation of supercritical carbon dioxide flows across critical point Peer-reviewed

Satoru Yamamoto, Takashi Furusawa, Ryo Matsuzawa

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER　54　(4)　774-782　2011/01

DOI： 10.1016/j.ijheatmasstransfer.2010.10.030 　

ISSN： 0017-9310
FPGA-Array with Bandwidth-Reduction Mechanism for Scalable and Power-Efficient Numerical Simulations Based on Finite Difference Methods Peer-reviewed

Kentaro Sano, Wang Luzhou, Yoshiaki Hatsuda, Takanori Iizuka, Satoru Yamamoto

ACM TRANSACTIONS ON RECONFIGURABLE TECHNOLOGY AND SYSTEMS　3　(4)　2010/11

DOI： 10.1145/1862648.1862651 　

ISSN： 1936-7406

eISSN： 1936-7414
Numerical simulation of supercritical hydrothermal synthesis with phase change Peer-reviewed

Takashi Furusawa, Satoru Yamamoto

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B　76　(765)　771-777　2010
Publisher: Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.76.765_771 　

ISSN： 0387-5016
Acceleration of Supercritical-fluid Flow Computation using an Accurate Look-up Table of Thermophysical Properties Peer-reviewed

Takashi Furusawa, Yasuhiro Sasao, Kentaro Sano, Satoru Yamamoto

Proc. 8th Asian Computational Fluid Dynamics Conference　CD-ROM　2010
NUMERICAL AND EXPERIMENTAL INVESTIGATIONS OF UNSTEAY 3-D WET-STEAM FLOWS THROUGH TWO-STAGE STATOR-ROTOR CASCADE CHANNELS Peer-reviewed

Satoru Yamamoto, Yasuhiro Sasao, Hiroto Kato, Hiroshi Satsuki, Hiroharu Ooyama, Kouichi Ishizaka

PROCEEDINGS OF THE ASME TURBO EXPO 2010: TURBOMACHINERY: AXIAL FLOW FAN AND COMPRESSOR AERODYNAMICS DESIGN METHODS, AND CFD MODELING FOR TURBOMACHINERY, VOL 7, PTS A-C　(GT2010-22796)　2257-2265　2010

DOI： 10.1115/GT2010-22796 　
Numerical method for flows of arbitrary substance in arbitrary conditions

Satoru Yamamoto, Takashi Furusawa

Computational Fluid Dynamics 2008　545-550　2009
Publisher: Springer Berlin Heidelberg
DOI： 10.1007/978-3-642-01273-0_71 　
Numerical method for near-critical fluids of arbitrary material Peer-reviewed

Satoru Yamamoto, Atsushi Ito

Computational Fluid Dynamics 2006 - Proceedings of the Fourth International Conference on Computational Fluid Dynamics, ICCFD 2006　In press　795-800　2009
Publisher: springer berlin
DOI： 10.1007/978-3-540-92779-2-125 　
Numerical Prediction of Unsteady Flows through Whole Nozzle-Rotor Cascade Channels with Partical Admission Peer-reviewed

Yasuhiro Sasao, Kazuhiro Monma, Tadashi Tanuma, Satoru Yamamoto

International Journal of Fluid Machinery and Systems　2　(3)　248-253　2009
Publisher: Turbomachinery Society of Japan, Korean Fluid Machinery Association, Chinese Society of Engineering Thermophysics, IAHR
DOI： 10.5293/IJFMS.2009.2.3.248 　

ISSN： 1882-9554

More details Close

This paper presents a numerical study for unsteady flows in a high-pressure steam turbine with a partial admission stage. Compressible Navier-Stokes equations are solved by the high-order high-resolution finite-difference method based on the fourth-order compact MUSCL TVD scheme, Roe's approximate Riemann solver, and the LU-SGS scheme. The SST-model is also solved for evaluating the eddy-viscosity. The unsteady two-dimensional flows through whole nozzle-rotor cascade channels considering a partial admission are numerically investigated. 108 nozzle passages with two blockages and 60 rotor passages are simultaneously calculated. The influence of the flange in the nozzle box to the lift of rotors is predicted. Also the efficiency of the partial admission stage changing the number of blockages and the number of nozzles is parametrically predicted.
NUMERICAL AND EXPERIMENTAL INVESTIGATIONS OF UNSTEADY 3-D FLOW THROUGH TWO-STAGE CASCADES IN STEAM TURBINE MODEL Peer-reviewed

Yasuhiro Sasao, Hiroto Kato, Satoru Yamamoto, Hiroshi Satsuki, Hiroharu Ooyama, Kouichi Ishizaka

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON POWER ENGINEERING 2009 (ICOPE-09), VOL 2　(09-205)　479-484　2009
簡単なＩＢ法による三次元任意形状物体周り流れの数値計算 Peer-reviewed

水谷恒一郎, 山本悟

日本機械学会論文集B編　74　(742)　1347-1353　2008
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.74.1347 　

ISSN： 0387-5016

More details Close

A simple computational algorithm for solving flows over an arbitrary-shaped 3D geometry is proposed. This algorithm is based on the Immersed Boundary (IB) Method. A surface mesh for the object is generated by 3DCG software as a set of triangle polygons. A 3D Cartesian grid is used for the flow field. The velocity field near the object is modified by the present IB method along each grid line separately. In this paper, the present method is applied to an incompressible Navier-Stokes solver based on SMAC method using the staggered grid. Some practical flow problems assuming low Reynolds number are calculated and the results are compared with the experimental and the numerical results. Also, the present method is applied to flows over a moving object. Finally, the performance of the simple IB method applied to flows over 3D objects is discussed.
任意物質の圧縮性熱対流が計算できる数値解法 Peer-reviewed

古澤卓, 山本悟

日本機械学会論文集B編　74　(746)　2984-2090　2008

DOI： 10.1299/kikaib.74.2084 　
Parallel Computation of Condensate Flows through 2-D and 3-D Multistage Turbine Cascades Peer-reviewed

Satoru Yamamoto, Yasuhiro Sasao, Kentaro Sano, Hiroshi Satsuki, Kouichi Ishizaka, Hiroharu Ooyama

Proc. International Gas Turbine Congress 2007 Tokyo　CD-ROM　2007/12
Parallel-Implicit Computation of Three-dimensional Multistage Stator-Rotor Cascade Flows with Condensation Peer-reviewed

Satoru Yamamoto, Yasuhiro Sasao, Shoichiro Sato, Kentaro Sano

Proc. 18th AIAA Computational Fluid Dynamics Conference　(AIAA 2007-4460)　2007/06
A supercritical-fluids simulator applied to flows of arbitrary substance in arbitrary conditions Peer-reviewed

Satoru Yamamoto, Shinichi Yano, Akira Ishigame, Takashi Furusawa

FEDSM 2007: PROCEEDINGS OF THE 5TH JOINT AMSE/JSME FLUIDS ENGINEERING SUMMER CONFERENCE VOL 1, PTS A AND B　CD-ROM　69-74　2007

DOI： 10.1115/FEDSM2007-37154 　
A very simple immersed boundary method applied to three-dimensional incompressible Navier-Stokes solvers using staggered grid Peer-reviewed

Satoru Yamamoto, Koichiro Mizutani

FEDSM 2007: PROCEEDINGS OF THE 5TH JOINT AMSE/JSME FLUIDS ENGINEERING SUMMER CONFERENCE VOL 1, PTS A AND B　CD-ROM　63-68　2007

DOI： 10.1115/FEDSM2007-37153 　
Numerical and experimental predictions of heterogeneous condensate flow of moist air in cooled pipe Peer-reviewed

K Sakakura, S Yamamoto

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW　27　(2)　220-228　2006/04

DOI： 10.1016/j.ijheatfluidflow.2005.08.006 　

ISSN： 0142-727X

eISSN： 1879-2278
多段タービン翼列を通る湿り蒸気流れの数値シミュレーション Peer-reviewed

笹尾泰洋, 山本悟, 石坂浩一, 大山宏治

日本機械学会論文集B編　73　(728)　2006/04

DOI： 10.1299/kikaib.73.936 　
Preconditioning method for compressible near-critical fluids in micro-channel Peer-reviewed

Satoru Yamamoto

Computational Fluid Dynamics 2004, Proceedings　517-522　2006
ターボ機械多段翼列を通る非定常三次元湿り蒸気流れの大規模並列計算

笹尾泰洋, 山本悟

SENAC　39　(3)　33-42　2006
Systolic computational-memory architecture for an FPGA-based flow solver Peer-reviewed

Kentaro Sano, Takanori Iizuka, Satoru Yamamoto

IEEE MWSCAS'06: PROCEEDINGS OF THE 2006 49TH MIDWEST SYMPOSIUM ON CIRCUITS AND SYSTEMS,　423-+　2006

DOI： 10.1109/MWSCAS.2006.382089 　

ISSN： 1548-3746
Numerical Investigation of Condensation and Turbulence in Turbine Stator-rotor Interaction Peer-reviewed

Yasuhiro SASAO, Satoru YAMAMOTO, Tadashi TANUMA

Proceedings of 2005 Asian Congress on Gas Turbine　CD-ROM　2005/11
Preconditioning method applied to near-critical carbon-dioxide flows in micro-channel Peer-reviewed

S Yamamoto, M Toratani, Y Sasao

JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING　48　(3)　532-539　2005/08

DOI： 10.1299/jsmeb.48.532 　

ISSN： 1340-8054
Preconditioning method for condensate fluid and solid coupling problems in general curvilinear coordinates Peer-reviewed

S Yamamoto

JOURNAL OF COMPUTATIONAL PHYSICS　207　(1)　240-260　2005/07

DOI： 10.1016/j.jcp.2005.01.013 　

ISSN： 0021-9991
Numerical Analysis of Combined free and Forced Convection of Fluids with Condensate in Parallel Plate Channels Peer-reviewed

Kei Sakakura, Yasuhiro Sasao, Satoru Yamamoto

Proceedings of the Sixth KSME-JSME Thermal and Fluids Engineering Conference　CD-ROM　2005/03
Numerical Investigation of Condensate Turbulent Flows in Turbomachinery Peer-reviewed

Yasuhiro Sasao, Satoru Yamamoto

Proceedings of the Sixth KSME-JSME Thermal and Fluids Engineering Conference　CD-ROM　2005/03
Computation of practical flow problems with release of latent heat Peer-reviewed

S Yamamoto

ENERGY　30　(2-4)　197-208　2005/02

DOI： 10.1016/j.energy.2004.04.041 　

ISSN： 0360-5442
A Preconditioning Method for Two-Phase Flows with Cavitation Peer-reviewed

Byeong Rog SHIN, Satoru YAMAMOTO

Computational Fluid Dynamics JOURNAL　13　(4)　722-729　2005/01
Preconditioning method for very-slow flows with heterogeneous condensation in a mixing T-junction channel Peer-reviewed

Kei Sakakura, Yasuhiro Sasao, Satoru Yamamoto

Proceedings of the ASME Fluids Engineering Division Summer Conference - 2005, Vol 1, Pts A and B　(FEDSM2005-77073)　1025-1032　2005

DOI： 10.1115/FEDSM2005-77073 　
Numerical prediction of unsteady flows through turbine stator-rotor channels with condensation Peer-reviewed

Yasuhiro Sasao, Satoru Yamamoto

Proceedings of the ASME Fluids Engineering Division Summer Conference - 2005, Vol 1, Pts A and B　(FEDSM2005-77205)　855-861　2005

DOI： 10.1115/FEDSM2005-77205 　
Verification of preconditioned implicit flux-splitting method to two-dimensional natural convections Peer-reviewed

Kei Sakakura, Satoru Yamamoto

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B　71　(709)　2213-2217　2005
Publisher: Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.71.2213 　

ISSN： 0387-5016
A numerical method for natural convection and heat conduction around and in a horizontal circular pipe Peer-reviewed

S Yamamoto, D Niiyama, BR Shin

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER　47　(26)　5781-5792　2004/12

DOI： 10.1016/j.ijheatmasstransfer.2004.06.039 　

ISSN： 0017-9310
Overrelaxation applied to lower-upper symmetric Gauss-Seidel method for hypersonic flows Peer-reviewed

S Yamamoto, D Sato

AIAA JOURNAL　42　(9)　1849-1853　2004/09

ISSN： 0001-1452
Application of preconditioning method to gas-liquid two-phase flow computations Peer-reviewed

BR Shin, S Yamamoto, Y Xin

JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME　126　(4)　605-612　2004/07

DOI： 10.1115/1.1777230 　

ISSN： 0098-2202

eISSN： 1528-901X
PRECONDITIONED FLUX-SPLITTING METHOD FOR CONDENSATE FLOWS AND NEAR-CRITICAL FLUIDS Invited Peer-reviewed

Satoru Yamamoto, Byeong Rog Shin

Proceedings of ECCOMAS2004-Jyvaskyla　CD-ROM　2004/07
Numerical Prediction of Humid Effect to Transonic Flows in Turbomachinery Peer-reviewed

Yasuhiro SASAO, Satoru YAMAMOTO

Proceedings of International Gas Turbine Congress 2003 Tokyo　I　CD-ROM　2003/11
A Numerical Method for Gravitational Condensate Flows with Structure Peer-reviewed

Satoru YAMAMOTO, Daisuke NIIYAMA, Byeong Rog SHIN

Proceedings of the 5th Asian Computational Fluid Dynamics　I　CD-ROM　2003/10
Onset of condensation in vortical flow over sharp-edged delta wing Peer-reviewed

S Yamamoto

AIAA JOURNAL　41　(9)　1832-1835　2003/09

ISSN： 0001-1452
PRECONDITIONED HIGH-RESOLUTION SCHEME FOR GRAVITATIONAL FLOWS WITH CONDENSATION Peer-reviewed

Satoru YAMAMOTO, Daisuke NIIYAMA, Byeong-Rog SHIN

Proceedings of FEDSM’03, 4th ASME_JSME Joint Fluids Engineering Conference　FEDSM2003-45390　CD-ROM　2003/07
Preconditioned implicit flux-splitting scheme for condensate flows Peer-reviewed

S Yamamoto, BR Shin

COMPUTATIONAL FLUID DYNAMICS 2002　I　112-117　2003
Preconditioned implicit flux-splitting scheme and its application to thermal-fluid convections Peer-reviewed

Satoru Yamamoto, Daisuke Niiyama, Byeong Rog Shin

Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B　69　(678)　274-279　2003
Publisher: Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.69.274 　

ISSN： 0387-5016
Numerical Method of Steady and Unsteady Compressible Interdisciplinary Flow Problems Invited Peer-reviewed

Satoru Yamamoto

Computational Fluid Dynamics JOURNAL　11　234-241　2002/07
Numerical investigation of supersonic MPD viscous flows with ionization Peer-reviewed

Hironori Takeda, Satoru Yamamoto

JSME International Journal, Series B: Fluids and Thermal Engineering　45　(1)　97-101　2002/02

DOI： 10.1299/jsmeb.45.97 　

ISSN： 1340-8054
Implicit time-marching solution of partially ionized flows in self-field MPD thruster Peer-reviewed

H Takeda, S Yamamoto

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　44　(146)　223-228　2002/02

DOI： 10.2322/tjsass.44.223 　

ISSN： 0549-3811
Numerical simulation of transonic viscous flow around wing in atmospheric conditions Peer-reviewed

Daigo Sato, Satoru Yamamoto

Nippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B　68　(671)　1905-1910　2002
Publisher: Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.68.1905 　

ISSN： 0387-5016
Onset of Condensation in Vortical Flow over Sharp-edged Delta Wing Peer-reviewed

Satoru Yamamoto

Proc. of 15th AIAA Computational Fluid Dynamics　CD-ROM　1-10　2001/06
Time-marching method for complicated compressible flow equations with source term Peer-reviewed

S Yamamoto

COMPUTATIONAL FLUID DYNAMICS 2000　133-138　2001
Numerical Study of Unsteady 3D Hypersonic Shock Interference Flows Peer-reviewed

Satoru Yamamoto

Computational Fluid Dynamics JOURNAL　Special Number　766-770　2001
Flow Characteristics of Unsteady Three-dimensional Type IV Shock Interference Peer-reviewed

Satoru YAMAMOTO, Hiroshi TERASHIMA

Preprint of Fluids 2000, AIAA Paper 2000-2690　1-7　2000/06
Numerical simulation of condensation around the 3-D wing Peer-reviewed

S Yamamoto, H Hagari, M Murayama

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　42　(138)　182-189　2000/02

ISSN： 0549-3811
An efficient implicit scheme of MPD thruster viscous flow Peer-reviewed

Satoru Yamamoto, Fumito Chiba

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B　66　(643)　647-654　2000
Publisher: Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.66.647 　

ISSN： 0387-5016
Numerical investigation shock/vortex interaction in hypersonic thermochemical nonequilibrium flow Peer-reviewed

S Yamamoto, N Takasu, H Nagatomo

JOURNAL OF SPACECRAFT AND ROCKETS　36　(2)　240-246　1999/03

ISSN： 0022-4650
Shock-Vortex Capturing Method and it's Application to Unsteady 3-D Cascade Flow Peer-reviewed

Satoru Yamamoto

Computational Fluid Dynamics JOURNAL　8　(2)　341-349　1999
Numerical Study of Unsteady Gas and Steam Turbine Cascade Flows Peer-reviewed

Satoru Yamamoto, Tadashi Tanuma

Proc. of Int. Gas Turbine Congress 1999 Kobe　I　489-496　1999
Numerical Simulation of Condensation around the 3-D Wing Peer-reviewed

Satoru Yamamoto, Hideki Hagari, Mitsuhiro Murayama

Journal of Japan Society of Aeronautics and Space Sciences　47　(540)　41-46　1999/01
Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES
DOI： 10.2322/jjsass.47.41 　

ISSN： 1344-6460

More details Close

The nonequilibrium condensation generating around the 2-D and 3-D wings in moist air, so-called 'Vapor Trail, ' is numerically investigated. The fundamental equations composed of the compressible Navier-Stokes equations and tho model equations for the phase change based on the classical condensation theory are solved using the fourth-order accurate compact MUSCL TVD scheme and the second-order Runge-Kutta scheme. As numerical examples, the 2-D transonic viscous flows around the RAE 2822 wing in moist air are calculated changing the relative humidity and the calculated results are compared with those in dry air and the experiment. Also the 3-D flows around the ONERA M 6 wing in moist air are preliminary calculated.
Comptation of Unsteady 3-D Transonic Flow through Gas Turbine Cascade Channel Peer-reviewed

Satoru YAMAMOTO, Takashi SHIRAISHI

Trans. JSME, Series B　64　(624)　2424-2430　1998/08

DOI： 10.1299/kikaib.64.2424 　
An efficient CFD approach for simulating unsteady hypersonic shock-shock interference flows Peer-reviewed

S Yamamoto, S Kano, H Daiguji

COMPUTERS & FLUIDS　27　(5-6)　571-580　1998/06

DOI： 10.1016/S0045-7930(97)00061-3 　

ISSN： 0045-7930
Numerical study of unsteady shock/boundary-layer interaction induced by a blunt fin Peer-reviewed

Satoru Yamamoto, Norinao Takasu

29th AIAA Fluid Dynamics Conference　1-9　1998
Publisher: American Institute of Aeronautics and Astronautics Inc.
DOI： 10.2514/6.1998-2815 　
Numerical investigation of nonequilibrium condensation effect around 3-D transonic wing in moist air Peer-reviewed

S Yamamoto, H Hagari

SIXTEENTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN FLUID DYNAMICS　515　554-559　1998

ISSN： 0075-8450
Aerodynamic Performance of a Cooled Turbine Nozzle Peer-reviewed

渋谷直紀, 川崎榮, 田沼唯士, 山本悟

Journal of GTSJ　25　(99)　70-75　1997/12
Numerical Investigation of Unsteady Shock/shock and Shock/vortex Interactions in Non-perfect Gas Peer-reviewed

Satoru Yamamoto

Proc. of the 7th Int. Symp. on Computational Fluid Dynamics　1　640-645　1997/09
Parametric Study of Unsteady Hypersonic Shock/Shock Interference Flow using Shock-Vortex Capturing Method Peer-reviewed

Norinao Takasu, Satoru Yamamoto

Proc. of Int. Conf. on Fluid Engineering, JSME Centennial Grand Congress　1　431-436　1997/07
Numerical Investigation of Condensation Effect to Unsteady Transonic Viscous Flows in Moist Air Peer-reviewed

Hideki Hagari, Satoru Yamamoto

Proc. of Int. Conf. on Fluid Engineering, JSME Centennial Grand Congress　III　1701-1706　1997/07
Navier-stokes analysis of unsteady transonic flows through gas turbine cascadeswith and without coolant ejection Peer-reviewed

T. Tanuma, N. Shibukawa, S. Yamamoto

Proceedings of the ASME Turbo Expo　1　25-32　1997
Publisher: American Society of Mechanical Engineers (ASME)
DOI： 10.1115/97-GT-479 　
Stabilization of higher-order high resolution schemes for the compressible Navier-Stokes equations Peer-reviewed

H Daiguji, Yuan, X, S Yamamoto

INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW　7　(2-3)　250-&　1997

DOI： 10.1108/09615539710163293 　

ISSN： 0961-5539
Numerical Investigation of Shock/Vortex Interaction in Hypersonic Thermochemical Nonequilibrium Flow Peer-reviewed

S.Yamamoto, N.Takasu, H.Nagatomo

Preprint of the AIAA 32nd Thermophysics Conference, AIAA Paper 97-2553　1-9　1997
An Application of q-w Turbulence Model to Numerical Simulation of Near Wake Flow Peer-reviewed

A. Lebedev, H. Daiguji, S. Yamamoto

Computational Fluid Dynamics JOURNAL　5　(4)　509-526　1997/01
Navier-stokes analysis of unsteady transonic flows through gas turbine cascadeswith and without coolant ejection Peer-reviewed

T. Tanuma, N. Shibukawa, S. Yamamoto

Proceedings of the ASME Turbo Expo　1　1-15　1997
Publisher: American Society of Mechanical Engineers (ASME)
DOI： 10.1115/97-GT-479 　
Shock-Vortex Capturing Method for Strongly Unsteady Flow Problems Peer-reviewed

S. Yamamoto

Proc. of 15th Int. Conf. on Numerical Methods in Fluid Dynamics, Lecture Notes in Phys., Springer　490　590-595　1996/06
Structure of Bow Shock and Compression Wave Interaction in Unsteady Hypersonic Shock/Shock Interference Flow Peer-reviewed

S.Yamamoto, S.Kano

AIAA Paper 96-2152　1-8　1996
Numerical Simulation of Hypersonic Non-equilibrium Wake Flow Using a Higher-Resolution Method Peer-reviewed

長友英夫, 山本悟, 大宮司久明

Trans. JSME, Series B　62　(600)　3052-3057　1996
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.62.3052 　

ISSN： 0387-5016

More details Close

An object which flies hypersonic speed, such as an aeroassisted orbital transfer vehicle, is affected greatly by not only the bow shock but also the expansion around the shoulder and the recompression of separated flow. Though the experiments to analyze this flow have been performed by some groups recently, there are some difficulties in measuring the ow because of limitations of instrumentation. Both experimental and numerical approaches are necessary to analyze the phenomena. The efficient numerical code which has been developed by the authors for hypersonic thermochemical non-equilibrium flow is applied to simulate the problem. The calculated results of different accuracy's in space, the perfect gas and the experimental data are compared.
Numerical Method for Transonic Viscous Flow Considering Humidity Peer-reviewed

Akihiro Iriya, Satoru Yamamoto, Hisaaki Daiguji

Trans. JSME, Series B　62　(603)　3854-3859　1996

DOI： 10.1299/kikaib.62.3854 　
Numerical investigation of shock interference in hypersonic thermochemical nonequilibrium flow Peer-reviewed

H Nagatomo, S Yamamoto, H Daiguji

COMPUTATIONAL FLUID DYNAMICS '96　1　39-44　1996
Structure of Unsteady Shock/vortex Interaction behind the Object obtained by the Fourth-order Shock Capturing Method Peer-reviewed

S.Yamamoto, H.Daiguji

Proc. of the Symp. on Mathematical Modeling of Turbulent Flows, The University of Tokyo　I　369-374　1995/12
Numerical Investigation of Unsteady Shock/turbulent Boundary Layer Interactions in Turbomachinery Peer-reviewed

S.Yamamoto, H.Daiguji

Proc. of the Symp. on Mathematical Modeling of Turbulent Flows, The University of Tokyo　I　363-368　1995/12
Structure of Unsteady Hypersonic Shock/Shock Interference Flows obtained by the Higher-Resolution CFD Approach Peer-reviewed

S.Yamamoto, S.Kano, T.Okuyama, H.Daiguji

Proc. of the Symp. on Mathematical Modeling of Turbulent Flows, The University of Tokyo　I　375-380　1995/12
A Higher-Order CFD Approach to Shock/Vortex Interaction and its Application to Turbomachinery Invited Peer-reviewed

S.Yamamoto, X.Yuan, H.Daiguji

Proc.of the 1995 Yokohama Int. Gas Turbine Congress　I　27-34　1995/10
An implicit explicit flux vector splitting scheme for hypersonic thermochemical nonequilibrium flows Peer-reviewed

S Yamamoto, H Nagatomo, H Daiguji

FOURTEENTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN FLUID DYNAMICS　453　314-319　1995

ISSN： 0075-8450
An Efficient CFD Approach for Simulating Unsteady Hypersonic Shock-Shock Interference Flows Peer-reviewed

Shintaro Kano, Satoru Yamamoto, Hisaaki Daiguji

Proc. of 6th Int. Symp. on Computational Fluid Dynamics　2　570-575　1995
Navier-Stokes Analysis of Unsteady Transonic Flows through Turbine Cascades Peer-reviewed

T.Tanuma, S.Yamamoto, X.Yuan, H.Daiguji

Proc. of the Seventh Int. Symp. on Unsteady Aerodynamics and Aeroelasticity of Turbomachines, Elsevier Science　I　691-707　1994/09
Publisher:
Higher-Resolution Finite Difference Schemes for Unsteady Transonics Cascade Flow Peer-reviewed

X.Yuan, S.Yamamoto, H.Daiguji

Journal of Gas Turbine Society of Japan　22　(86)　29-35　1994/09
Publisher: Gas Turbine Society of Japan
ISSN： 0387-4168
COMPUTATION OF UNSTEADY TRANSONIC CASCADE FLOW USING THE EULER AND NAVIER-STOKES EQUATIONS OF CONTRAVARIANT VELOCITIES Peer-reviewed

S YAMAMOTO, H DAIGUJI

JSME INTERNATIONAL JOURNAL SERIES B-FLUIDS AND THERMAL ENGINEERING　37　(3)　522-530　1994/08

DOI： 10.1299/jsmeb.37.522 　

ISSN： 1340-8054
Higher-Order Numerical Simulation of Unsteady Shock/Vortex Interactions Peer-reviewed

S.Yamamoto, A.Takahashi, H.Daiguji

AIAA Paper 94-2305　1-8　1994
A Higher-Resolution Shock-Capturing Scheme for Simulating Unsteady Three-Dimensional Transonic Flows in Turbomachinery Peer-reviewed

X.Yuan, S.Yamamoto, H.Daiguji

AIAA Paper 94-3199　1-8　1994
On the 4th-Order Compact MUSCL TVD Scheme Approached to Complex Flow Problems Peer-reviewed

Satoru Yamamoto, Hisaaki Daiguji

Proc. of the 5th Int. Symposium on Computational Fluid Dynamics　III　381-386　1993/09
Three-Dimensional Navier-Stokes Simulation of Transonic Cascade Flows Considering Unsteady Wakes Peer-reviewed

Xin Yuan, Satoru Yamamoto, Hisaaki Daiguji

Proc. of the 5th Int. Symposium on Computational Fluid Dynamics　III　421-426　1993/09
Unsteady Navier-Stokes Analysis of Transonic Cascade Flow in Turbomachinery Peer-reviewed

Tadashi Tanuma, Satoru Yamamoto, Xin Yuan, Hisaaki Daiguji

Proc. of the 5th Int. Symposium on Computational Fluid Dynamics　III　217-222　1993/09
A Higher-Order Accurate Navier-Stokes Solver for 3D Supersonic Mixing Layers with an Efficient Visualization Algorithm Peer-reviewed

Koichi Ishizaka, Yasushi Sugita, Satoru Yamamoto, Hisaaki Daiguji

Proc. of the 5th Int. Symposium on Computational Fluid Dynamics　I　358-362　1993/09
Application of Computational Fluid Dynamics to Large-Scale Turbine Blade Designs Peer-reviewed

Tadashi Tanuma, Xin Yuan, Satoru Yamamoto, Hisaaki Daiguji

Proc. of JSME-ASME Int. Conf. on Power Engineering-93　2　(93)　361-366　1993/09
HIGHER-ORDER-ACCURATE UPWIND SCHEMES FOR SOLVING THE COMPRESSIBLE EULER AND NAVIER-STOKES EQUATIONS Peer-reviewed

S YAMAMOTO, H DAIGUJI

COMPUTERS & FLUIDS　22　(2-3)　259-270　1993/03

DOI： 10.1016/0045-7930(93)90058-H 　

ISSN： 0045-7930
A Fourth-Order MUSCL Finite-Difference Scheme for Solving the Unsteady Compressible Euler Equations Peer-reviewed

S. Yamamoto, H. Daiguji, K. Ishizaka

Trans. JSME, Series B　59　(557)　43-48　1993/01
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.59.43 　

ISSN： 0387-5016

More details Close

A fourth-order compact MUSCL (Monotone Upstream-centered Scheme for Conservation Laws) TVD (Total Variation Diminishing) scheme is proposed for solving the unsteady compressible Euler Equations. The fundamental form of the present scheme is based on the second (third) -order accurate MUSCL finite-difference scheme. One of the distinctive features of this scheme is the ability to capture discontinuities such as slip lines or contact surfaces as well as shocks more sharply than the existing TVD schemes in spite of the use of a simpler algorithm than that of the so-called ENO scheme. Therefore, this scheme can be easily applied to any ordinary numerical solvers based on the second (third) -order MUSCL scheme. We also adopt this scheme into the existing Euler solver developed by the authors which can simulate unsteady inviscid flows accurately by means of the Newton iteration and the Crank-Nicholson method. In order to verify the reliability of the present scheme, an unsteady inviscid supersonic flow having oblique shocks and a slip line is computed. The results show that the slip line as well as oblique shocks can be captured completely.
Numerical Analysis and Steam-Tunnel Tests of Transonic Flows through a Steam Turbine Cascade Peer-reviewed

T. Tanuma, S. Yamamoto, T.Ikeda, H. Daiguji

Trans. JSME, Series B　58　(555)　3330-3336　1992/11

DOI： 10.1299/kikaib.58.3330 　
Numerical Analysis of Unsteady Turbulent Flows through Transonic Turbine and Compressor Cascades Peer-reviewed

S. Yamamoto, H. Daiguji

Computational Fluid Dynamics JOURNAL　1　(1)　91-103　1992/04
Numerical Simulation of Supsersonic Mixing Layers using a Fouth-order Accurate Shock Capturing Scheme Peer-reviewed

Hisaaki Daiguji, Satoru Yamamoto, Koichi Ishizaka

Proc. of 13th Int. Conf. on Numerical Methods in Fluid Dynamics, Lecture Notes in Phys., Springer-Verlag　414　315-319　1992
A Higher-Order Accurate Navier-Stokes Solver for Transonic and Supersonic Flows in Turbomachinery Peer-reviewed

S.Yamamoto, H.Daiguji

AIAA Paper 92-3044　1-8　1992
Unsteady Navier-Stokes Simulation of Turbulent Flows through a Supersonic Compressor Cascade Peer-reviewed

S.Yamamoto, H. Daiguji

Proc. of the First ASME/JSME Fluids Engineering Conference　FED-120　73-79　1991/06
Development of A Numerical Simulation for Analyzing Unsteady Transonic Cascade Flows Peer-reviewed

K. Ishizaka, S. Yamamoto, H.Daiguji

日本機械学会論文集Ｂ編　57　(544)　4130-4135　1991
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.57.4130 　

ISSN： 0387-5016

More details Close

An efficient numerical simulator for calculating the unsteady transonic cascade flows and for visualizing these numerical data is developed. The authors have already developed a numerical method, in which an implicit time-marching finite-difference scheme for solving the unsteady Euler and Navier-Stokes equations in general curvilinear coordinates and several numerical techniques have been applied in order to simulate the unsteady flows having shocks and their induced boundary layer separations such as the flow through a transonic or supersonic compressor cascade. With regard to a system developed by us, a graphics work station having the power of the super-minicomputer was connected with an image recorder which can control a 16mm movie camara, and we have developed a computational code with the UNIX System which can calculate any flow and make the visualized film from the results at the same time. In particular, we can make an animation visualizing the unsteady transonic cascade flow within a half-day at most with no effort, Therefore, we should emphasize that the present system is one of the most effective tools for simulating unsteady flows.
A NUMERICAL-METHOD FOR THE TRANSONIC CASCADE FLOW PROBLEM Peer-reviewed

S YAMAMOTO, H DAIGUJI

COMPUTERS & FLUIDS　19　(3-4)　461-478　1991

ISSN： 0045-7930
Numerical Simulation of Unsteady Turbulent Flow through Transonic and Supersonic Cascades Peer-reviewed

Satoru Yamamoto, Hisaaki Daiguji

Proc. of 12th Int. Conf. on Numerical Methods in Fluid Dynamics, Lecture Notes in Phys., Springer-Verlag　371　485-489　1990/07
A Streamwise TVD Scheme for Solving the Compressible Euler Equations Peer-reviewed

Satoru Yamamoto, Hisaaki Daiguji

Proc. of Third Int. Conf. on Hyperbolic Problems, Uppsala　II　980-991　1990/06
A Navier-Stokes Analysis of 3-D Transonic Cascade Flow and Its Visualization Peer-reviewed

Satoru Yamamoto, Hisaaki Daiguji, Shuji Ikeda

Trans. JSME, Series B　56　(523)　765-772　1990/03
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.56.765 　

ISSN： 0387-5016

More details Close

The purpose of this paper is, first, to analyze 3-D transonic cascade flow by using the TVD Navier-Stokes code developed by the authors. Since the momentum equations of contravariant velocities are used in the code, the treatments of boundary conditions, especially the solid wall and the periodic boundaries for the 3-D cascade flow, become very easy. A Chakravarthy-Osher type TVD scheme modified by the authors is adopted in order to clearly simulate 3-D complex flow having shock waves and separation bubbles. The second purpose is to visualize the computed results by using the 3-D color graphic display. As numerical examples, the 3-D viscous flows thorough a transonic axial-flow compressor rotor with or without a tip clearance are computed, and the colored oli-flow patterns, 3-D particle paths, 3-D time lines which show the shock/boundary layer interactions and a leakage vortex near the casing wall are obtained. In particular, the mechanism of occurrence of the leakage vortex is investigated in detail.
A Numerical Method for Solving the Unsteady Compressible Navier-Stokes Equations Peer-reviewed

Satoru Yamamoto, Hisaaki Daiguji

Proc. of Int. Symp. on Computational Fluid Dynamics-Nagoya　II　710-715　1989/08
Computer Simulation of 3-D Compressible Cascade Flow in Turbomachine Peer-reviewed

Satoru Yamamoto, Hisaaki Daiguji, Yasuhiko Otsuki

Photographic Journal of Flow Visualization　6　42-47　1989/07
Computation of Transonic Cascade Flow Using the Euler and Navier-Stokes Equations of Contravariant Velocities Peer-reviewed

Satoru Yamamoto, Hisaaki Daiguji, Kazumichi Ito

Trans. JSME, Series B　55　(515)　1943-1951　1989/07
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.55.1943 　

ISSN： 0387-5016

More details Close

Implicit time-marching finite-difference methods for solving the two- and three-dimensional compressible Euler and Navier-Stokes equations are presented. The distinctive feature of these methods is to use the momentum equations of contravariant velocity components. By using such equations, accurate and easy treatments of the solid wall boundary condition are realized for the Euler equations, and simple treatments of he periodic boundary condition become possible for the impeller flows. The numerical method are based on the Beam-Warming delta-form approximate-factorization scheme, and take into consideration the diagonalization and upstreaming by the theory of characteristics. The computations of turbulent flows are implemented using the two-equation k-ε turbulence model with the law of the wall. Finally, some numerical results of transonic cascade flow are shown.
An Implicit Time-Marching Method for Solving the 3-D Compressible Navier-Stokes Equations Peer-reviewed

Hisaaki Daiguji, Satoru Yamamoto

Proc. of 11th Int. Conf. on Numerical Methods in Fluid Dynamics, Lecture Notes in Phys., Springer-Verlag　323　210-214　1989
反変速度成分の三次元オイラ-方程式の各種差分スキ-ムとタ-ボ機械の流れへの応用 Peer-reviewed

権正吾, 山本悟, 伊藤一道, 大宮司久明

ターボ機械　16　(2)　74-80　1988/02
Publisher: Turbomachinery Society of Japan
DOI： 10.11458/tsj1973.16.74 　

ISSN： 0385-8839
An Implicit Time-Marching Scheme for Solving the Compressible Navier-Stokes Equations Peer-reviewed

S. Yamamoto, H. Daiguji

Proc. of the Int. Symp. on Computational Fluid Dynamics, Sydney, published by North-Holland　1　773-784　1988
Publisher:
Time-Marching Finite-Difference Scheme for Three-Dimensional Compressible Euler Equations Peer-reviewed

H. Daiguji, S. Yamamoto, Y. Motohashi

Trans. JSME, Series B　53　(486)　393-399　1987
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/kikaib.53.393 　

ISSN： 0387-5016

More details Close

Explicit and implicit time-marching finite-difference schemes are proposed for analysing three -dimensional steady and unsteady inviscid transonic flows. These schemes are different from the existing methods since the Euler equations of contravariant velocities in general curvilinear coordinates are used. However, some computational techniques used in the existing methods, such as linearization, diagonalization and upstreaming are also applied to these schemes. The finally obtained equations for the numerical computation have almost the same complexity as the corresponding existing methods. The remarkable feature of these methods is the ability to treat solid wall boundary conditions easily and exactly including, implicit schemes. A calculated result of shocked transonic flow through a converging-diverging square nozzle is shown.
Computation of Transonic Cascade Flow Using the Euler and Navier-Strokes Equations of Contravariant Velocities Peer-reviewed

S. Yamamoto, H. Daiguji, K. Ito

Proc. of the 1987 Tokyo Int. Gas Turbine Congress　II　295-302　1987
AN EFFICIENT TIME-MARCHING SCHEME FOR SOLVING COMPRESSIBLE EULER EQUATIONS Peer-reviewed

H DAIGUJI, S YAMAMOTO

BULLETIN OF THE JSME-JAPAN SOCIETY OF MECHANICAL ENGINEERS　29　(255)　2845-2850　1986/09

ISSN： 0021-3764
An Implicit Time-marching Method for Solving the 3-D Compressible Euler Equations Peer-reviewed

H. Daiguji, Y. Motohashi, S. Yamamoto

Proc. of 10th Int. Conf. on Numerical Methods in Fluid Dynamics, Lecture Notes in Phys., Springer-Verlag　264　205-210　1986
An Efficient Time-Marching Method for Solving the Compressible Euler Equations Peer-reviewed

H. Daiguji, S. Yamamoto

Proc. of Int. Symp. on Computational Fluid Dynamics-Tokyo　1　217-228　1985

Show all ︎Show first 5

Misc. 112

実際の作動環境における遷音速軸流圧縮機の熱流動シミュレーション技術 Invited Peer-reviewed

山本悟, 古澤卓, 宮澤弘法

日本ガスタービン学会誌　53　(4)　22-28　2025/07
超臨界二酸化炭素を用いた先進発電サイクルの技術動向 Invited Peer-reviewed

古澤卓, 山本悟

日本ガスタービン学会誌　52　(3)　2024/05
「特殊用途タービンシステムの最新動向」特集刊行にあたり，巻頭言 Invited Peer-reviewed

山本悟

日本ガスタービン学会誌　52　(3)　2024/05
巻頭言、スーパーコンピュータ SX と歩んだ研究者人生 Invited

山本悟

東北大学サイバーサイエンスセンター大規模科学計算システム広報SENAC　57　(1)　1-2　2024/01
Publisher: 東北大学サイバーサイエンスセンター
デジタルツイン数値タービンへの道 Invited

山本悟

日本機械学会流体工学部門ニュースレター　11月号　2023/11
機械工学年鑑2023「流体工学」章代表者 Invited Peer-reviewed

山本悟

日本機械学会ホームページ https://www.jsme.or.jp/kikainenkan2023/　2023/07
東北大学山本(悟)・古澤研究室の紹介 Invited Peer-reviewed

山本悟, 古澤卓

日本ガスタービン学会誌　51　(4)　7-9　2023/07
デジタルツイン数値タービンの研究開発—Research Development of Digital Twin Numerical Turbine—特集カーボンニュートラルのための火力発電技術

山本悟, 宮澤弘法, 古澤卓

ターボ機械 = Turbomachinery　51　(5)　275-281　2023/05
Publisher: 東京 : ターボ機械協会 ; 1973-
ISSN： 0385-8839
デジタルツイン数値タービンの研究開発 Invited Peer-reviewed

山本悟, 宮澤弘法, 古澤卓

ターボ機械5月号（日本工業出版）　2023/05
持続可能社会に向けたデジタルツインガスタービンの研究開発，マルチフィジックスCFDアプリ：数値タービン Invited

山本悟, 古澤卓, 宮澤弘法

クリーンエネルギー（日本工業出版）　31　(3)　32-36　2022/03

ISSN： 0918-7510
LES of Supercritical-Water Mixing Flow in a Continuous Hydrothermal Synthesis Reactor

古澤卓, 名古屋雄大, 山本悟, 横哲, 阿尻雅文

数値流体力学シンポジウム講演論文集(CD-ROM)　36th　2022

ISSN： 2433-2674
A study on stability improvement of a gas-turbine compressor for power generation under partial-load operation based on full-anulus flow computation

萩田泰晴, 宮澤弘法, 古澤卓, 山本悟

日本ガスタービン学会定期講演会講演論文集(CD-ROM)　50th　2022

ISSN： 2432-6739
Simulation of Moist-Air Flows through A Full-Annulus Industrial Gas Turbine Compressor under Partial-Load Operations

徳山好紀, 萩田泰晴, 宮澤弘法, 古澤卓, 山本悟

日本ガスタービン学会定期講演会講演論文集(CD-ROM)　50th　2022

ISSN： 2432-6739
Turbulent Mixing Flow Simulation of Supercritical Water in a Continuous Hydrothermal Synthesis Reactor

松井建太, 古澤卓, 山本悟, 横哲, 阿尻雅文

数値流体力学シンポジウム講演論文集(CD-ROM)　35th　2021

ISSN： 2433-2674
Unsteady flow simulation for an actual gas-turbine compressor under part-load operation

萩田泰晴, 徳山好紀, 宮澤弘法, 古澤卓, 山本悟, 梅沢修一, 米澤宏一, 鈴木武志, 大森修一

日本ガスタービン学会定期講演会講演論文集(CD-ROM)　49th　2021

ISSN： 2432-6739
Numerical Simulation of Nonequilibrium Condensation in High-pressure CO2 Flows with Real Gas Effect

古澤卓, 小島匠, 宮澤弘法, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　34th　2020

ISSN： 2433-2674
Simulation of Unsteady Flows through Intermediate-Pressure Steam Turbine Stages with Eroded Stator Blade Rows

船迫昌平, 宮澤弘法, 古澤卓, 山本悟, 米澤宏一, 梅沢修一, 大森修一, 鈴木武志

数値流体力学シンポジウム講演論文集(CD-ROM)　34th　2020

ISSN： 2433-2674
Simulation of Unsteady Flows in Intermediate Pressure Steam Turbine with Cutback Stator Blade Row

宮澤弘法, 上村晃弘, 古澤卓, 山本悟, 梅沢修一, 米澤宏一, 大森修一, 鈴木武志

日本機械学会年次大会講演論文集(CD-ROM)　2020　2020

ISSN： 2424-2667
非平衡凝縮を伴うマルチフィジックス熱流動のシミュレーション技術，特集「マルチフィジックスシミュレーションの進展」 Invited Peer-reviewed

山本悟, 古澤卓

日本ガスタービン学会誌　47　(6)　389-395　2019/11
数値タービンのスーパーコンピューティング Invited Peer-reviewed

山本悟

化学工学会誌　88　(6)　337-339　2019/06
ガスタービン用圧縮機翼列流れへの湿りの影響に関する数値的研究-第3報:Rotor37における湿り空気の凝縮-

森口昇太, 宮澤弘法, 古澤卓, 山本悟

日本ガスタービン学会定期講演会講演論文集(CD-ROM)　47th　2019

ISSN： 2432-6739
蒸気タービン中圧三段の非定常流動シミュレーション

宮澤弘法, 上村晃弘, 古澤卓, 山本悟, 米澤宏一, 梅沢修一, 大森修一

数値流体力学シンポジウム講演論文集(CD-ROM)　33rd　2019

ISSN： 2433-2674
低圧タービン翼のカットバックに関するLES

森口昇太, 宮澤弘法, 古澤卓, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　33rd　2019

ISSN： 2433-2674
超臨界CO2流れのシミュレーション技術 Invited Peer-reviewed

山本悟

日本ガスタービン学会ガスタービンセミナー　2019/01
Steam Turbine Tutrial: A Free Energy Perspective on Homogneous Nucleation Model Invited

Satoru Yamamoto

ASME 2018 Turbo Expo　(GT2018-77505)　2018/05
ガスタービン用圧縮機翼列流れへの湿りの影響に関する数値的研究-第2報:Rotor37の湿り空気流動解析-

森口昇太, 宮澤弘法, 古澤卓, 山本悟

日本ガスタービン学会定期講演会講演論文集(CD-ROM)　46th　2018

ISSN： 2432-6739
遷臨界条件下における三次元ラバルノズル内の非平衡凝縮シミュレーション

古澤卓, 宮澤弘法, 森口昇太, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　32nd　2018

ISSN： 2433-2674
高解像度差分スキームを用いた湿り空気流動の数値解析

森口昇太, 宮澤弘法, 古澤卓, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　32nd　2018

ISSN： 2433-2674
ガスタービン用圧縮機翼列流れへの湿りの影響に関する数値的研究(第1報)Rotor37による数値タービンの検証—A numerical study of wetness effects on gas turbine compressor flow field : The verification of Numerical Turbine on NASA rotor 37

森口昇太, 宮澤弘法, 古澤卓, 山本悟, 田中隆太, 青塚瑞穂

日本ガスタービン学会定期講演会講演論文集 / 日本ガスタービン学会編　45　47-52　2017/10
Publisher: 日本ガスタービン学会
ISSN： 2432-6593
ガスタービン用圧縮機翼列流れへの湿りの影響に関する数値的研究-第1報:Rotor37による数値タービンの検証-

森口昇太, 宮澤弘法, 古澤卓, 山本悟, 田中隆太, 青塚瑞穂

日本ガスタービン学会定期講演会講演論文集　45th　2017

ISSN： 2432-6593
軸流圧縮機遷音速湿り空気流れの数値シミュレーション

森口昇太, 宮澤弘法, 古澤卓, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　31st　2017

ISSN： 2433-2674
高圧条件における二酸化炭素のラバルノズル内部非平衡凝縮シミュレーション

古澤卓, 宮澤弘法, 森口昇太, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　31st　2017

ISSN： 2433-2674
蒸気タービン低圧段における非定常衝撃波干渉の数値解析

宮澤弘法, 古澤卓, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　31st　2017

ISSN： 2433-2674
Evaluation of Lossless Data Compression Hardware with Quantized Length of Prediction Residual Peer-reviewed

2016　88-96　2016/05/30
非平衡凝縮流れ解析に関する最近の研究動向

山本悟, 古澤卓, 宮澤弘法

日本ガスタービン学会定期講演会講演論文集　44th　2016

ISSN： 2432-6593
非平衡凝縮および平衡凝縮が蒸気タービン多段長翼列に与える影響に関する数値的評価

宮澤弘法, 服部雄真, 古澤卓, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　30th　2016

ISSN： 2433-2674
高圧条件における水蒸気のノズル内部の非平衡凝縮シミュレーション

古澤卓, 宮澤弘法, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　30th　2016

ISSN： 2433-2674
凝縮を伴う超臨界二酸化炭素の遷音速流動シミュレーション

古澤卓, 宮澤弘法, 山本悟

日本機械学会年次大会講演論文集(CD-ROM)　2016　2016

ISSN： 2424-2667
実機翼枚数を考慮した蒸気タービン低圧段長翼列に作用する非定常空力解析

宮澤弘法, 古澤卓, 山本悟

日本機械学会年次大会講演論文集(CD-ROM)　2016　2016

ISSN： 2424-2667
複数FPGAによる並列流体計算と帯域圧縮通信による性能向上

上野知洋, 佐野健太郎, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　30th　2016

ISSN： 2433-2674
1610 Simulation of Unsteady Wet-steam Flows through Low-ressure Turbine Stages with Multi-passage

MIYAZAWA Hironori, Yamamoto Satoru

Fluids engineering conference ...　2015　"1610-1"-"1610-2"　2015/11/07
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-0251

More details Close

Unsteady wet-steam flows through a three-stage low-pressure steam-turbine model developed by Mitsubishi Heavy Industry are numerically investigated. We solved compressible Nervier-Stokes equations coupled with nonequilibrium condensation models and SST turbulence model. Numerical results obtained by assuming single passage and multi passage are compared with each other and the effect of the blade number on unsteady wet-steam flows in the real low-pressure steam turbine is discussed. Numerical results are also compared with the experimental data.
1608 Numerical Simulation of Transonic Flows of Supercritical CO2 through a 2D Cascade

FURUSAWA Takashi

Fluids engineering conference ...　2015　"1608-1"-"1608-2"　2015/11/07
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-0251

More details Close

Brayton Cycle of CO_2 has been recognized as an attractive new method for power generation. In this cycle, Supercritical CO_2 is compressed and heated beyond the critical pressure and temperature. Transonic flows through a compressor cascade are investigated under the supercritical condition by our numerical method coupled with the condensation model. The condensation by the temperature decreasing is found near the leading edge.
J0520101 Gasdynamics of Unsteady Flows through 3-D Steam Turbine Low Pressure Final Three Stages

MIYAZAWA Hironori, MIYAKE Satoshi, Yamamoto Satoru

Mechanical Engineering Congress, Japan　2015　"J0520101-1"-"J0520101-3"　2015/09/13
Publisher: The Japan Society of Mechanical Engineers

More details Close

In this paper, unsteady forces of wet-steam flows through real steam turbine low pressure final three stages developed by Mitsubishi Heavy Industry are numerically investigated. Compressible Nervier-Stokes equations coupled with nonequilibrium condensation models are simultaneously solved. The SST-model is also employed for evaluating the eddy-viscosity. Time-dependent pressure distributions on three-stage stator-rotor blade surfaces at constant spans are plotted to show the magnitude and the variation of unsteady forces locally. And then, the flow mechanism, how such unsteady forces are generated from the wet-steam flow through the multi-stage blade rows, is predicted.
J0520302 Transonic Flow Simulation of Supercritical CO_2 through a Compressor Cascade

Furusawa Takashi, Yamamoto Satoru

Mechanical Engineering Congress, Japan　2015　"J0520302-1"-"J0520302-4"　2015/09/13
Publisher: The Japan Society of Mechanical Engineers

More details Close

Supercritical CO_2 has been recognized as an attractive new method for power generation. In this system, Supercritical CO_2 is compressed and heated beyond the critical pressure and temperature. In this study, transonic flows through a compressor cascade are investigated under the supercritical pressure condition by our numerical method. A detached bow shock is found near the leading edge and a normal shock is captured between the blades. The results are compared with those of the atmospheric condition.
J0520201 A numerical method applied to turbulent supercritical-fluid flow simulations

QI Shibo, FURUSAWA Takashi, YAMAMOTO Satoru

Mechanical Engineering Congress, Japan　2015　"J0520201-1"-"J0520201-4"　2015/09/13
Publisher: The Japan Society of Mechanical Engineers

More details Close

The numerical simulation of turbulent supercritical water flows is presented. In the present method, the supercritical-fluids simulator is coupled with the building-cube method because of its simplicity and efficiency, and a meshless method is implemented as a wall boundary treatment because of its flexibility and adaptability. The implementation of the SST turbulence model has been accomplished to deal with the turbulent supercritical-fluid flows. The supercritical water jet submerged in a subcritical water environment is simulated, which is a typical process of supercritical-fluid flows in the hydrothermal spallation drilling application. First, turbulence model implementation verification is proposed with the classical case of zero pressure gradient flat plate. Then, the effects of temperature and pressure on the behavior of the supercritical water jets are investigated.
Inter-Cube Data-Exchanging for Custom Fluid Computing Machine Based on Building-Cube Method

UENO Tomoya, UENO Tomohiro, SANO Kentaro, YAMAMOTO Satoru

Technical report of IEICE. VLD　114　(426)　79-84　2015/01/29
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

More details Close

In our research project, we have developed an FPGA-based custom computing machine for parallel fluid computation based on Building-Cube Method(BCM). In BCM, fluid computation is parallelized with cubes with various sizes, which are each composed of an orthogonal computational lattice with the same resolution. Although BCM is expected to provide good load balancing with cubes, the sustained performance is limited for an incompressive fluid computing scheme due to its low operational intensity. Moreover, it is also reported that parallel processing efficiency is decreased by the overhead of data transfer and interpolation for exchanging ghost cells between adjacent cubes. This paper describes an algorithm and its hardware mechanism for data-transfer and interpolation to achieve efficient inter-cube data exchange.
Small Bandwidth Compression Hardware Exploited Distribution of Length of Prediction Residual

Ueno Tomohiro, Ito Ryo, Sano Kentaro, Yamamoto Satoru

Technical report of IEICE. VLD　114　(426)　73-78　2015/01/29
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

More details Close

This paper shows a compact bandwidth compressor to increase the performance of numerical computation on FPGA. We must reduce an area overhead of the compressor to apply to numerical computation with multiple channels. Therefore, we propose a method exploited distribution of residual length to reduce the area of barrel shifters which cause of huge hardware. We show that the proposed method achieves a decent compression ratio with very small compressor by simulation with modeled data and hardware implementation.
実機低圧タービンを通る非定常湿り蒸気流れの複数流路解析

宮澤弘法, 山本悟

日本機械学会流体工学部門講演会講演論文集(CD-ROM)　93rd　2015

ISSN： 1348-2882
超臨界二酸化炭素の二次元翼列遷音速流動シミュレーション

古澤卓, 宮澤弘法, 山本悟

日本機械学会流体工学部門講演会講演論文集(CD-ROM)　93rd　2015

ISSN： 1348-2882
湿りを伴う実機タービンの低圧段長翼列に作用する非定常空力解析

宮澤弘法, 三宅哲, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　29th　2015

ISSN： 2433-2674
High-performance Numerical Stream Compuation with Hardware-based Memory Bandwidth Compression

上野知洋, 佐野健太郎, 山本悟

情報処理学会研究報告(Web)　2015　(HPC-151)　2015
帯域圧縮による数値計算ハードウェアの高性能化

上野知洋, 佐野健太郎, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　29th　2015

ISSN： 2433-2674
Implementation and Evaluation of Multi-stream Bandwidth Compressor

2014　(24)　1-6　2014/01/21
ストリームプロセッサ自動生成コンパイラの開発と格子ボルツマン法専用計算コアへの適用

伊藤涼, 鈴木隼人, 上野知洋, 佐野健太郎, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　28th　2014

ISSN： 2433-2674
ワークショップ「CFDの産業活用における方向性」，マルチフィジックスCFDの産業応用 Invited Peer-reviewed

山本悟

日本機械学会2013年度年次大会DVD論文集　2013/09
Publisher: 日本機械学会
密結合FPGAクラスタによる格子ボルツマン法専用計算機の設計と実装

鈴木隼人, 高野芳彰, 千葉諒太郎, 佐野健太郎, 山本悟

第75回全国大会講演論文集　2013　(1)　127-128　2013/03/06

More details Close

本研究では、高効率なカスタムコンピューティングを目的として、FPGAを用いた格子ボルツマン法専用計算機の開発を行っている。この専用計算機の計算要素は、計算格子を走査して得られるデータストリームに対し、ストリーミング計算を行う。また、計算要素を2次元アレイ構造に配置することにより、時間的及び空間的に並列に計算を行うことが可能となる。本稿では、計算要素の設計の詳細、および密結合FPGAクラスタによる試作実装について述べる。
ビルディングキューブ法に基づく非圧縮性流体計算の専用計算機アーキテクチャに関する一考察

千葉諒太郎, 高野芳彰, 佐野健太郎, 山本悟, 佐々木大輔, 中橋和博

第75回全国大会講演論文集　2013　(1)　129-130　2013/03/06

More details Close

本研究ではビルディングキューブ法による流体計算を高速に行うカスタムアクセラレータの実現を目的とし、FPGAによる試作実装を行っている。本稿ではその仮アーキテクチャを提案し、性能評価を行う。計算機の性能を制限する主な要因は、バンド幅不足による演算器稼働率の低下である。このことから、仮アーキテクチャの設計要件を任意に増加可能な計算要素及び必要最小限のデータ移動による計算とし、設計を行う。性能評価においては、仮アーキテクチャのパラメータが性能に与える影響と最も大きなバンド幅を要求する接続を明らかにする。さらに、計算ステージ毎の実効バンド幅及び計算時間から、もっとも効果的に性能を上昇させるステージを特定する。
Performance Evaluation of Parametalized Data Compression Hardware for Floating-Point Data Stream

2013　(4)　1-6　2013/01/09
Implementation and performance evaluation of the accelerator for Lattice Boltzmann method on FPGA cluster

2013　(29)　1-6　2013/01/09
Implementation and Evaluation of Data Compression Hardware for Bandwidth Enhancement of Multiple Data Streams

上野知洋, 高野芳彰, 佐野健太郎, 山本悟

電子情報通信学会技術研究報告　113　(52(RECONF2013 1-19))　2013

ISSN： 0913-5685
密結合FPGAクラスタを用いた高効率LBM専用計算機の性能評価

伊藤涼, 千葉諒太郎, 鈴木隼人, 上野知洋, 佐野健太郎, 山本悟

電気関係学会東北支部連合大会講演論文集(CD-ROM)　2013　2013
Implementation and Evaluation of FPGA-based Data Compression Hardware of Floating-Point Data-Stream

上野知洋, 高野芳彰, 佐野健太郎, 山本悟

電子情報通信学会技術研究報告　112　(70(RECONF2012 1-23))　2012

ISSN： 0913-5685
数値データストリーム圧縮ハードウェアの性能評価

上野知洋, 高野芳彰, 佐野健太郎, 山本悟

数値流体力学シンポジウム講演論文集(CD-ROM)　26th　2012

ISSN： 2433-2674
B-14 Performance Prediction of Partial Admission Stage based on Simulation of Unsteady Three-Dimensional Flows

SASAO Yasuhiro, TAKADA Shinji, TANUMA Tadashi, YAMAMOTO Satoru

(39)　159-162　2011/07/06
Publisher: Gas Turbine Society of Japan
ISSN： 0919-1941

More details Close

In this paper, the performance of a partial admission stage is parametrically predicted using the high-order high-resolution numerical method developed by our group. Compressible Navier-Stokes equations are solved by the high-order high-resolution finite-difference method based on the fourth-order compact MUSCL TVD scheme, Roe's approximate Riemann solver, and the LU-SGS scheme. The SST-model is also solved for evaluating the eddy-viscosity. Unsteady three-dimensional flows through half-arc nozzle-rotor cascade channels considering a partial admission are numerically investigated. 54 nozzle passages with two blockages and 30 rotor passages are simultaneously calculated. The influence of the flange in the nozzle box to the lift of rotors is predicted.
高性能格子ボルツマン計算のためのマルチFPGAアクセラレータの性能見積り

高野芳彰, 佐野健太郎, 山本悟

先進的計算基盤システムシンポジウム論文集　2011　268-268　2011/05/18
Evaluation of Scalable Streaming Array for High-Performance Stencil Computation with Low Memory Bandwidth

SANO Kentaro, HATSUDA Yoshiaki, KONO Yoshiaki, YAMAMOTO Satoru

IEICE technical report　111　(31)　79-84　2011/05/05
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

More details Close

Stencil computation is one of the important kernels in scientific computations, however, the sustained performance is limited by memory bandwidth on multi-core processors and GPGPUs due to its small operational-intensity. In this paper, we propose a scalable streaming-array (SSA), which allows multiple FPGAs to achieve linearly-scalable stencil computation by deeply pipelining with a constant external-memory bandwidth. We present a design of SSA and formulate a performance model of the pipelined execution. For 2D Jacobi computations, SSA implemented on nine Stratix III FPGAs with the memory bandwidth of only 2 GB/s achieves 260 GFlop/s, corresponding to 87.4 % of the peak, due to the linear speedup obtained for larger than medium-sized computation.
Encoding Methods of Multiple Data Streams for Hardware Compressors of Floating-Point Data

2010　(5)　6p　2011/02
Publisher: 情報処理学会
ISSN： 1884-0930
Encoding Methods of Multiple Data Streams for Hardware Compressors of Floating-Point Data

SANO Kentaro, KATAHIRA Kazuya, YAMAMOTO Satoru

IEICE technical report　110　(361)　111-116　2011/01/10
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

More details Close

This paper presents encoding methods to synchronously compresses and decompress multiple data-streams of floating-point numbers in order to enhance memory bandwidth of stream computation. The compressors compress the multiple data in parallel and send the compressed data to the decompresses through a single channel. When the data streams have different compression ratios, streams with low compression ratios have to be sent with a higher priority than the others for synchronization among the streams. In our encoding methods, the synchronous decompression is achieved without extra information in addition to the compressed data We show the hardware mechanisms for the proposed methods, and demonstrate that they work correctly by using software emulation. We also evaluate a necessary size of FIFOs to temporally store the data to be sent into the single channel.
Paradigm shift of CFD toward CFC Invited Peer-reviewed

Satoru Yamamoto

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B　77　(774)　195-204　2011
Publisher: 日本機械学会
DOI： 10.1299/kikaib.77.195 　

ISSN： 0387-5016
ターボ機械・エネルギー機器に関する先端マルチフィジックスシミュレーション，非平衡凝縮・超臨界流体の数値解法をその応用 Invited Peer-reviewed

山本悟

ターボ機械　657-666　2010/11
Publisher: ターボ機械協会
0601 Numerical Study of Performance Improvement for Steam Turbine Admission Stage by Changing Flange Structure

Takada Shinji, SASAO Yasuhiro, YAMAMOTO Satoru

Fluids engineering conference ...　2010　181-182　2010/10/29
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-2882

More details Close

In the partial admission stage of steam turbines, a flange is placed to separate the nozzle box. The flange makes a large wake which causes the partial admission loss and the ventilation loss. Additionally, it causes a rotor lift oscillation which gives an extra stress to rotors. This paper presents a numerical study of unsteady flows in a partial admission stage. Seven cases with a different flange thickness were simulated. Thicker flanges resulted in better total efficiencies.
0604 CFD Analyses of Turbine Exhaust Hood Performances with Nonuniform Inlet Flows

Tanuma Tadashi, Niizeki Yoshiki, Sasao Yasuhiro, Shibukawa Naoki, Yamamoto Satoru

Fluids engineering conference ...　2010　187-188　2010/10/29
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-2882

More details Close

Low pressure exhaust hood is one of the important parts in steam turbines, since the aerodynamic loss of exhaust hoods is nearly the same level of the loss of stator and rotor blading in low pressure steam turbines and there seems to be not little room remained for the enhancement of steam turbine efficiency. This paper presents the result of exhaust hood CFD analyses using last stage exit velocity distributions measured in the real scale development steam turbine as the inlet boundary condition to improve the accuracy of the CFD analysis.
0603 Numerical Simulation of Supercritical Carbon Dioxide through Supersonic Nozzle

Anan Ryo, Furusawa Takashi, Yamamoto Satoru

Fluids engineering conference ...　2010　185-186　2010/10/29
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-2882

More details Close

Our research group has proposed a numerical method for supercritical fluids; Supercritical-Fluid Simulator(SFS). In this paper, supercritical carbon dioxide flows impacting on a flat plate through supersonic nozzle are calculated using SFS and the flow features changing inlet pressure, inlet temperature and the distance to the flat plate are comparatively investigated. Especially, it is noted that the density in the nozzle is rapidly changed and is deeply dependent to the inlet boundary conditions.
0602 Numerical Analysis of Unsteady Flows through Multi-Stage Stator-Rotor Steam Turbine Model

MIYAKE Satoshi, KATO Hiroto, SASAO Yasuhiro, YAMAMOTO Satoru

Fluids engineering conference ...　2010　183-184　2010/10/29
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-2882

More details Close

Unsteady 3-D flows through two-stage stator-rotor cascade channels in two steam turbine models developed by Mitsubishi Heavy Industry (MHI) are numerically investigated. In low pressure steam turbine cascades, steam flows generate water droplets mainly due to homogeneous nucleation. The mass generation rate for water droplets is modeled as a sum of the mass generation rate of critical-sized nucleus and the growth rate of a water droplet based on the classical condensation theory. The total pressure, the static pressure, and the yaw angle in span-wise directions obtained by the 3-D calculations are compared with the experimental data.
A-14 Unsteady Flow Simulation of Model Turbine using Wet-steam

Sasao Yasuhiro, Kato Hiroto, Yamamoto Satoru

(38)　119-122　2010/10/20
Publisher: Gas Turbine Society of Japan
ISSN： 0919-1941

More details Close

Unsteady 3-D flows through two-stage stator-rotor cascade channels in a model turbine are numerically investigated. Compressible Nervier-Stokes equations are solved by the fourth-order compact MUSCL TVD scheme, Roe's approximate Riemann solver, and the LU-SGS scheme. The SST-model is used for evaluating the eddy-viscosity. Condensate mass fractions, pressure distributions, and total pressure losses obtained by the 3-D calculations are compared with each other and compared with the experimental data. Finally the output and the total-total efficiency ratios in the model turbine are numerically predicted.
Hardware Lossless-Compressors of Floating-Point Data Streams to Enhance Memory Bandwidth

SANO Kentaro, KATAHIRA Kazuya, YAMAMOTO Satoru

IEICE technical report　110　(204)　37-42　2010/09/09
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

More details Close

This paper presents an FPGA-based lossless compressor that directly compresses floating-point data streams to enhance the effective memory bandwidth of a lattice Boltzmann method (LBM) accelerator. We show that the compression algorithms based on the 1D polynomial prediction are suitable for high-throughput hardware design. Moreover we show that integer operations provide comparable prediction performance to a floating-point predictor, while an integer predictor is expected to have smaller circuits than a floating-point one. We evaluate the compression ratio, the operating frequency and the resource consumption of the compressors with integer-based predictors through their prototype implementation using ALTERA Stratix III FPGA. We demonstrate that the implemented compressors dominate only 0.15 to 0.23 % of the entire logic resources and operate at 95 to 174 MHz to provide the compression ratio of up to 3.5, which means that we can enhance the memory bandwidth by a factor of 3.5 on average.
GALS Design for Scalable Array Processors Operating on Multiple FPGAs

WANG LUZHOU, SANO Kentaro, YAMAMOTO Satoru

IEICE technical report　110　(32)　69-74　2010/05/06
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

More details Close

So far we have proposed systolic computational-memory(SCM)architecture for high-performance and scalable computation based on the finite difference methods. The SCM architecture has a completely parallel array structure to achieve scalable performance to the increased hardware resources of a multi-FPGA system. The problem is that real-world implementation requires globally asynchronous and locally synchronous(GALS)design for scalably operating over multiple FPGAs with different clock domains. This paper presents GALS design of SCM arrays(SCMA)for asynchronous communication and a stall mechanism to guarantee the data synchronization among processing elements of different clock domains. Prototype implementation with ALTERA Stratix III FPGAs shows that the proposed design does not give a big overhead in operating frequency and hardware resource utilization. We also evaluate the scalability of the SCMA over multiple FPGAs considering actual stall cycles.
小特集：「マルチフィジックスCFD/EFDの最前線」巻頭言 Invited Peer-reviewed

山本悟

日本機械学会論文集B編　764　(765)　711-711　2010/05
Publisher: 日本機械学会
DOI： 10.1299/kikaib.76.765_711 　

ISSN： 0387-5016
FPGA-based Stream Computation for HPC Designing and Evaluating a Scalable Pipeline-Module for 2D Jacobi Computation

SANO Kentaro, HATSUDA Yoshiaki, OTSUBO Yasuhiro, YAMAMOTO Satoru

IEICE technical report　109　(198)　113-118　2009/09/10
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

More details Close

VLSI technology scaling has made the effective performance of computing systems to be influenced mainly by their memory bandwidth rather than their arithmetic performance. Stream computation is expected to improve the effective performance by increasing an operational intensity for such bandwidth-bound computations. This research aims at building scalable FPGA-based custom-computing machines (CCMs) for high-performance computing, which consists of easily-extendable pipeline stages for effective stream computation. In this paper, we show streaming formulation and a model of its pipeline execution for the Jacobi computation, which is one of the simplest stencil computations. We design a pipeline module of the FPGA-based CCM and estimate the performance of its prototype implementation.
RC-011 Evaluating Inter-FPGA communication of Custom Computing Machines for Finite Difference Methods

WANG Luzhou, SANO Kentaro, HATSUDA Yoshiaki, IIZUKA Takanori, YAMAMOTO Satoru

8　(1)　189-196　2009/08/20
Publisher: Forum on Information Technology
蒸気タービン翼列における湿り蒸気流れの数値解法の現状 Invited Peer-reviewed

山本悟

ターボ機械　2009/04
Finite-Difference Method for Heat Conduction Equation and Excel Calculation, Special Issue: Heat Transfer; Combustion and Drying Invited Peer-reviewed

Satoru Yamamoto

Journal of the Technical Association of Refractories　28　(4)　239-244　2008/12
Inter-FPGA communication mechanism of FPGA-array for high-performance difference scheme computation

WANG LUZHOU, SANO Kentaro, HATSUDA Yoshiaki, YAMAMOTO Satoru

IEICE technical report　108　(300)　45-48　2008/11/10
Publisher: The Institute of Electronics, Information and Communication Engineers
ISSN： 0913-5685

More details Close

We propose array-structured custom-computing machines for high-performance difference scheme computation. The performance of the machines is in proportion to the number of PEs, because of the array structure of PEs. To achieve higher performance, we are implementing a large PE-array with an FPGA-array consisting of a lot of FPGAs. For the FPGA-array, the bandwidth between FPGAs limits the overall performance. In this paper, we show that actual computation requires narrower bandwidth than the full bandwidth due to sparse data-transer requirement. And then, we present a hardware structure to exploit the sparse data-transfer for narrower bandwidth in the inter-FPGA communication.
A-6 Numerical Analysis of Unsteady Wet-Steam Flows through Multi-Stage Steam Turbine

Sasao Yasuhiro, Yamamoto Satoru, Satsuki Hiroshi, Ohyama Hiroharu, Ishizaka Kouichi

(36)　47-48　2008/10/01
Publisher: Gas Turbine Society of Japan
ISSN： 0919-1941

More details Close

Unsteady 3-D flows through two-stage stator-rotor cascade channels in the steam turbine developed by Mitsubishi Heavy Industry(MHI) are numerically investigated. The mass generation rate for water droplets is formed as a sum of the mass generation rate of critical-sized nucleus and the growth rate of a water droplet based on the classical condensation theory. Wetness due to condensation, pressure distributions, and total pressure losses obtained by the 3-D calculations are compared with each other and compared with the experimental data. Also flow distributions of yaw and pitch angle in span-wise direction at the outlet of stators and rotors are compared with the experiments.
A-25 Numerical Analysis of Unsteady Flows through Whole Nozzle-Rotor Cascade Channels with Partial Admission

Sasao Yasuhiro, Monma Kazuhiro, Yamamoto Satoru, Tanuma Tadashi

(36)　155-158　2008/10/01
Publisher: Gas Turbine Society of Japan
ISSN： 0919-1941

More details Close

Unsteady flows through whole nozzle-rotor cascade channels in partial admission stage are numerically investigated using the high-resolution finite-difference method developed by our group. Compressible Navier-Stokes equations are solved by the fourth-order compact MUSCL TVD scheme, Roe's approximate Riemann solver, and the LU-SGS scheme. The SST-model is used for evaluating the eddy-viscosity. As numerical examples, unsteady two-dimensional flows in a partial admission stage of steam turbine are first calculated. 108 nozzle passages with two blockages and 60 rotor passages are simultaneously calculated. The effect of the blockage to the lift of rotors is numerically investigated. Also the efficiency of the partial admission stage changing the number of blockages and the number of nozzles is parametrically predicted.
RC-003 Evaluation of Inter-FPGA Communication Bandwidth for Array-Structured Custom Computers Dedicated to Difference Schemes

WANG Luzhou, SANO Kentaro, HATSUDA Yoshiaki, YAMAMOTO Satoru

7　(1)　25-28　2008/08/20
Publisher: Forum on Information Technology
FPGA-BASED IMPLEMENTATION OF ARRAY-STRUCTURED CUSTOM COMPUTING MACHINES FOR DIFFERENCE SCHEMES

SANO Kentaro, WANG Luzhou, HATSUDA Yoshiaki, YAMAMOTO Satoru

Proceedings of the conference on computational engineering and science　13　(2)　683-686　2008/05/19
Publisher: 日本計算工学会
ISSN： 1342-145X
マルチフィジックスＣＦＤシミュレーションの産業応用，タービン多段静動翼列を通る湿り蒸気流れの大規模計算 Invited Peer-reviewed

山本悟

日本流体力学会誌「ながれ」　27　121-126　2008/04

DOI： 10.11426/nagare1982.27.121 　
518 Preconditioning method applied to thermal convections of arbitrary substance(2)

FURUSAWA Takashi, YAMAMOTO Satoru

Fluids engineering conference ...　2007　"518-1"-"518-4"　2007/11/17
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-2882

More details Close

This paper presents the capability of the supercritical-fluids simulator (SFS) developed by us to simulate thermal convections of arbitrary substance in arbitrary conditions. In SFS, a numerical method based on the preconditioning method coupled with the PROPATH database is used. The method enables us to calculate not only thermal convections of supercritical fluids but also those of arbitrary substances in gas and liquid phases. As numerical examples, carbon-dioxide, water, nitrogen, methane and helium in a square cavity in several conditions are calculated using SFS and the calculated results are compared with each other and some of them are compared with the existing numerical results.
熱伝導方程式の差分解法とExcelを用いた計算 Invited Peer-reviewed

山本悟

耐火物技術協会誌　59　(9)　460-466　2007/09
Publisher: 耐火物技術協会
ISSN： 0039-8993
機械工学年鑑，流体工学，タービン流れ Invited Peer-reviewed

山本悟

日本機械学会誌　27-28　2007/08
Publisher: 日本機械学会
Numerical Turbine and the Supercomputing Invited Peer-reviewed

山本悟, 笹尾泰洋

ターボ機械協会誌　2006/09
3102 Numerical Simulation of Interference Flows with Condensation through Turbine Cascades in Multiple Stage

SASAO Yasuhiro, YAMAMOTO Satoru, ISHIZAKA Koichi, OHYAMA Hiroharu

The Computational Mechanics Conference　2005　(18)　197-198　2005/11/17
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-026X

More details Close

Wet-steam flows through steam-turbine cascades in a multiple stage are numerically simulated. As numerical examples, wet-steam flows through a single cascade channel developed by Bakhtar is calculated and the calculated results are compared with the experiments, and wet-steam flows through turbine cascades in multi stage developed by Mitsubishi Heavy Industries are calculated assuming unsteady states. Finally, the effect of the wetness in the stages are numerically predicted. Fundamental equations contain conservation laws of water vapor, water liquid, the number density of nucleus, momentum equations, and the energy equation. The SST turbulence model is employed to predict the eddy viscosity. The classical condensation theory is used for modeling homogeneous and heterogeneous condensations. These equations are solved by the fourth-order compact MUSCL TVD scheme and LU-SGS scheme.
ガスタービンの流体力学解析，数値計算 Invited Peer-reviewed

山本悟

第１１回ガスタービン教育シンポジウム資料　2005/07
Publisher: 日本ガスタービン学会
Numerical simulation of humid-air and wet-steam turbulent flows in turbomachinery

SASAO Yasuhiro, YAMAMOTO Satoru

The Computational Mechanics Conference　2004　(17)　159-160　2004/11/17
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-026X

More details Close

In this study, transonic humid-air and wet-steam turbulent flows through a steam turbine cascade channel are calculated. Transonic condensate flows in turbomachinery are numerically predicted by using the high-resolution method developed by our group. Fundamental equations consist of conservation laws of mixed gas, water vapor, water liquid, and the number density of water droplets, coupled with the momentum equations and the energy equation. The classical condensation theory is employed for modeling homogeneous nucleation and non-equilibrium condensation. These equations are solved by a high-order high-resolution finite-difference method based on the fourth-order compact MUSCL TVD scheme, Roe's approximate Riemann solver, and the LU-SGS scheme. SST model is used for evaluating eddy-viscosity.
ガスタービンに関連するCFD（数値流体力学）解析の現状，ガスタービンCFD技術の現状と将来動向 Invited Peer-reviewed

山本悟

日本ガスタービン学会誌　32　(4)　239-302,図巻頭4p　2004/07
Publisher: 日本ガスタービン学会
ISSN： 0387-4168
蒸気タービンの湿り蒸気の影響低減技術 Invited Peer-reviewed

田沼唯士, 長尾進一郎, 山本悟

ターボ機械　31　(8)　453-458　2003/08
Publisher: Turbomachinery Society of Japan
DOI： 10.11458/tsj1973.31.453 　

ISSN： 0385-8839
Gas Turbine Technology in Japan, R&D of CFD Code for Compressible Interdisciplinary Flows Invited Peer-reviewed

Satoru Yamamoto

Bulletin of GTSJ　2003/04
Computation of Vapor Trail over Delta Wing in Atmospheric Flight Conditions

YAMAMOTO Satoru, SHIN Byong-Rog

Journal of the Visualization Society of Japan　22　447-450　2002/07/01
Publisher: 可視化情報学会
ISSN： 0916-4731
複雑系流体解析コードの研究開発（ガスタービンから相変化工学まで） Invited Peer-reviewed

山本悟

日本ガスタービン学会誌　30　(4)　2002/07
航空分野からの研究発表を概観して Invited Peer-reviewed

山本悟

日本数値流体力学会誌　10　(1)　15-17　2002/01
419 Numerical Simulation of Condensation in 3-D Large-scale Vortex

Yamamoto Satoru, Shin Byong-Rog

Fluids engineering conference ...　2001　59-59　2001/09/28
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-2882
420 Numerical Simulation of Unsteady Steam Turbine Cascade Flow with Condensation

Yamamoto Satoru, Otomo Hiroyuji, Tanuma Tadashi

Fluids engineering conference ...　2001　60-60　2001/09/28
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-2882
412 Numerical Simulation of Transonic Viscous Flow around Wing in Atmospheric Conditions

SATO Daigo, YAMAMOTO Satoru, SHIN Byeong Rog

Fluids engineering conference ...　2001　52-52　2001/09/28
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-2882
CFD特集-2, タービン翼列内流れの非定常解析 Invited Peer-reviewed

山本悟

ターボ機械　28　(12)　28-34　2000/05
熱流体の数値計算, 数値解析手法 Invited Peer-reviewed

山本悟

日本ガスタービン学会誌　26　(102)　3-9　1998/09
ガスタービン冷却静翼の空力特性

渋川直紀, 川崎榮, 田沼唯士, 山本悟

ガスタービン定期講演会講演論文集　25　25-30　1997/05/15
Publisher: 公益社団法人日本ガスタービン学会
ISSN： 0919-1941
ナビエ・ストークス方程式による流れの数値シミュレーション, CFDの基礎(II), 反応流のモデルと計算 Invited Peer-reviewed

山本悟

日本数値流体力学会第1,2回講習会資料　125-212　1994/08
Numerical Simulation of Nonequilibrium Flow around the OREX(Proceedings of the 12th NAL Symposium on Aircraft Computational Aerodynamics. CFD Workshop on Hypersonic Flow)

Nagatomo Hideo, Yamamoto Satoru, Daiguji Hisaaki

Special publication of National Aerospace Laboratory : SP　26　19-22　1994
Publisher: 独立行政法人航空宇宙技術研究所
ISSN： 0289-260X
B-13 非定常遷音速翼列流れの高解像差分スキーム(非定常空力)

袁新, 山本悟, 大宮司久明

ガスタービン秋季講演会講演論文集　(5)　217-224　1993/09/27
Publisher: 公益社団法人日本ガスタービン学会
ISSN： 0919-1968
最近のターボ機械流れの解析技術 Invited Peer-reviewed

山本悟, 大宮司久明

ターボ機械　19　(11)　56-62　1991/11

DOI： 10.11458/tsj1973.19.750 　
数値シミュレーション技術（流れの数値解析法） Invited Peer-reviewed

大宮司久明, 山本悟

日本ガスタービン学会誌　17　(65)　4-10　1989/06
Publisher: Gas Turbine Society of Japan
ISSN： 0387-4168

Show all ︎Show first 5

Books and Other Publications 10

数値流体力学の基礎と応用

山本悟

森北出版　2025/04/14

ISBN: 9784627692312
Introduction to Three-dimensional Incompressible CFD

Satoru Yamamoto

ResearchGate　2020/01
Mathematical Modelling and Computation for Rapid Expansion of Supercritical Solutions, Supercritical and Other High-pressure Solvent Systems (ed. by Thomas M. Attard and Andrew J. Hunt)

atoru Yamamoto, Takashi Furusawa

Royal Society of Chemistry　2018/08

DOI： 10.1039/9781788013543-FP001 　
Introduction to Multiphysics CFD

Satoru Yamamoto

ResearchGate　2018/04

More details Close

Online lecture note: Introduction to Multiphysics CFD
Introduction to Mathematical Modeling and Computation

Satoru Yamamoto

ResearchGate　2018/04

More details Close

Online lecture note: Introduction to Mathematical Modeling and Computation
ガスタービン工学

山本悟

日本ガスタービン学会　2013/08
大学院情報理工学3 計算力学

山本悟

講談社サイエンティフィク　2000/03
Special Issue Dedicated to Professor Hisaaki Daiguji on the Occasion of His Retirement from Tohoku University, Computational Fluid Dynamics Journal

Mohamed Hafez, Satoru Yamamoto

1999
乱流の数値流体力学

山本悟, 大宮司久明

1998/01
衝撃波ハンドブック

大宮司久明, 山本悟

1995/12

Show all Show first 5

Presentations 61

航空宇宙研究を支える数値流体力学 Invited

山本悟

２０２５年度第１回H.I.T.航空宇宙研究センター特別講演会　2025/07/16
ベクトル型スパコンに最適化されたデジタルツイン数値タービン Invited

山本悟

第123回大阪大学工業会機械工学系技術交流会　2025/03/07
デジタルツインで明るい未来 Invited

山本悟

東北大学オープンキャンパス機械系オープン講義２０２４　2024/07/31
デジタルツイン数値タービンの研究開発 Invited

山本悟

日本ガスタービン学会第52回ガスタービンセミナー　2024/01/30
デジタルツイン数値タービンへの道 Invited

山本悟

日本機械学会2023年度年次大会　2023/09/05
臨界点をまたぐ超臨界流体のシミュレーション技術 Invited

山本悟

VINAS Industry Seminar「カーボンニュートラル・超臨界CO2・水素利用技術セミナー」　2021/03/09
Modeling and Simulation of Thermophysical Flows with Nonequilibrium Condensation International-presentation Invited

Satoru Yamamoto

14th International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows　2019/08/08
超臨界CO2流れのシミュレーション技術 Invited

山本悟

日本ガスタービン学会ガスタービンセミナー　2019/01/25
Steam Turbine Tutrial: A Free Energy Perspective on Homogneous Nucleation Model International-presentation Invited

Satoru Yamamoto

ASME 2018 Turbo Expo　2018/06/14
蒸気タービンを通過する湿り蒸気流れのCFD Invited

ターボ機械協会第122回セミナー「蒸気タービンのCFD」　2015/11/06
数値タービンならびに超臨界流体シミュレータ(SFS)の研究開発 Invited

VINAS User Conference 2015　2015/10/15
マルチフィジックスCFDの産業応用 Invited

山本悟

日本機械学会2013年次大会ワークショップマルチフィジックスCFDの産業応用「CFDの産業活用における方向性」　2013/09/09
Numerical Turbine System(NTS) and the Parallel Computation International-presentation Invited

Satoru Yamamoto, Yasuhiro Sasao

17th Workshop on Sustained Simulation Performance　2013/03/13
Simullation of Thermophysical Flows with Non-equilibrium Condensation International-presentation Invited

Satoru Yamamoto, Satoshi Miyake, Takashi Furusawa, Ryo Anan

Cambridge Baumann Centenary Conference on Wet Steam Flows　2012/09/10
Simulation of Thermophysical Flows International-presentation Invited

Satoru Yamamoto, Takashi Furusawa

Eighth KSME-JSME Thermal and Fluids Engineering Conference　2012/03/30
Preconditioning Method of Simulating Gas, Liquid, and Supercritical-fluid Flows with Phase Change International-presentation Invited

2010 Korea-Japan CFD Workshop　2010/11/19
蒸気タービン湿り蒸気流れの大規模シミュレーション Invited

日本機械学会2010年度年次大会先端技術フォーラム「流体機械・エネルギー機器の研究開発における先端マルチフィジックスシミュレーション」　2010/09/06
Numerical Method of Simulating Supercritical-fluid Flows across Critical Point International-presentation Invited

2nd International Workshops on Advances in Computational Mechanics　2010/03/31
Current Status of CFD Codes: IB Solver, Numerical Turbine(NT), and Supercritical-fluids Simulator(SFS) International-presentation Invited

11th Teraflop Workshop　2009/10/19
楽しい数値計算－数値流体力学・計算数理科学 Invited

岩手大学特別講義　2009/07/24
数値タービンと超臨界流体シミュレータ Invited

第１９回東北混相流研究会　2007/06/08
Supercomputing of Flows with Complex Physics and the Future Progress International-presentation Invited

5th Teraflop Workshop, Sendai　2006/11/21
Numerical Solution of the Rayleigh-Benard Convection at a Supercritical State International-presentation Invited

Satoru Yamamoto, Atsushi Ito, Akira Ishigame

ISHR&ICSTR2006　2006/08/06
Mathematical Modeling and Numerical Schemes for Condensate Flows and Near-critical Fluids International-presentation Invited

19th Symposium of Computational Fluid Dynamics, Japan-Korea CFD Seminar　2005/12/14
Numerical method for transonic flows with nonequilibrium condensation International-presentation Invited

Xi'an Jiaotang University, Invited Lectures　2005/12/04
ＯＳ「ＣＦＤの工学的応用」相変化を伴う流れ解析法の構築と実用化 Invited

日本機械学会計算力学講演会　2005/11/19
計算数理科学－その基盤としてのＣＦＤ－ Invited

特別講義、大阪大学　2005/07/22
Numerical Method for Multiphase with Phase Transition and Turbulence International-presentation Invited

IWACOM　2004/11
High-order Scheme International-presentation Invited

5th Asian Computational Fluid Dynamics Conference　2003/10/26
8th International Symposium on Gas-Liquid Two Phase Flows International-presentation

ASME Fluid Engineering Division Summer Meeting, 8th International Symposium on Gas-Liquid Two Phase Flows　2003/07/07
General Session II International-presentation

3rd Int. Symp. on Advanced Energy Conversion Systems and Related Technologies　2001/12/15
Numerical Method of Steady and Unsteady Compressible Interdisciplinary Flow Problems International-presentation

Japan-Russia Int. Workshop on Turbulence, Instabilities and Parallel Computing　2001/10/22
Onset of Condensation in Vortical Flow over Sharp-edged Delta Wing International-presentation

AIAA 15th CFD Conference　2001/06
CFD技術、タービン翼列内流れの非定常解析 Invited

ターボ機械協会第26回講習会　2001/03/09
NUMERICAL STUDY OF NONEQUILIBRIUM CONDENSATION IN UNSTEADY TRANSONIC VISCOUS FLOW PROBLEM International-presentation

ECCOMAS 2000　2000/09
NUMERICAL STUDY OF NONEQUILIBRIUM CONDENSATION IN UNSTEADY TRANSONIC VISCOUS FLOW PROBLEM International-presentation

AIAA FLUIDS 2000 Conference and Exhibit　2000/06
NUMER ICAL STUDY OF UNSTEADY GAS AND STEAM TURBINE CASCADE FLOWS International-presentation

International Gas Turbine Congress 1999　1999/11
Numerical Study of Unsteady 3D Hypersonic Shock Interference Flows International-presentation

8th ISCFD'99　1999/09
Numerical Investigation of Nonequilibrium Condensation Effect around 3-D Transonic Wing in Moist Air International-presentation

16th International Conference on Numerical Methods in Fluid Dynamics　1998/07
Numerical Study of Unsteady Shock/Boundary-Layer Interaction Induced by A Blunt Fin International-presentation

29th AIAA Fluid Dynamics Conference　1998/06
TVD法, 反応流 Invited

日本航空宇宙学会北部支部, CFD講習会　1997/10/02
Numerical Investigation of Shock/Vortex Interaction in Hypersonic Thermochemical Nonequilibrium Flow International-presentation

32nd Thermophysics Conference　1997/06
ガスタービン翼列流れにおける衝撃波/渦干渉の数値計算法 Invited

日本航空宇宙学会第29期年会講演会　1997/04/08
NUMERICAL INVESTIGATION OF STRONGLY NON-LINEAR TRANSONIC FLOW PROBLEMS AROUND THE AIRFOIL International-presentation

20th Congress of the International Council of the Aeronautical Science　1996/09
Accurate Schemes in CFD, Higher-Order Shock-Vortex Capturing for Unsteady Internal and External Flows International-presentation Invited

14th NAL Symposium on Aircraft Computational Aerodynamics　1996/06/06
SHOCK-VORTEX CAPTURING METHOD FOR STRONGLY UNSTEADY FLOW PROBLEMS International-presentation

15th International Conference on Numerical Methods in Fluid Dynamics　1996/06
Structure of Bow Shock and Compression Wave Interactions in Unsteady Hypersonic Shock/Shock Interference Flow International-presentation

1st AIAA Theoretical Fluid Mechanics Meeting　1996/06
東北大学における航空宇宙関連の研究の現状 Invited

岩手県宇宙航空開発推進協議会主催航空宇宙開発セミナー　1995/11/22
流束分離とTVD法 Invited

日本航空宇宙学会北部支部、圧縮性流れのCFD講習会　1995/10/14
非定常圧縮性流れの数値解析法(亜音速から極超音速まで)

東京大学大学院航空宇宙工学専攻1995年Aerospace Propulsion Seminar　1995/09/22
非定常衝撃波/渦干渉流れの高解像差分スキームとそのターボ機械への応用

1995 ターボ機械の空力セミナー in 盛岡　1995/08/20
ナビエ・ストークス方程式による流れのシミュレーション、CFDの基礎(II)、反応流のモデルと計算 Invited

日本数値流体力学会第1,2回講習会　1994/08/29
HIGHER-ORDER NUMERICAL SIMULATION OF UNSTEADY SHOCK/VORTEX INTERATIONS International-presentation

25th AIAA Fluid Dynamics Conference　1994/06
再突入の極超音速流、極超音速熱・化学非平衡流の数値解法 Invited

日本機械学会第71期通常総会、先端技術フォーラム　1994/03/29
スタンフォード大学での留学生活とその周辺の環境 Invited

日本機械学会東北支部技術懇談会　1993/06/18
A HIGHER-ORDER ACCURATE NAVIER-STOKES SOLVER FOR TRANSONIC AND SUPERSONIC FLOWS IN TURBOMACHINERY International-presentation

AIAA/SAE/ASME/ASEE 28th Joint Propulsion Conference and Exhibit　1992/07/06
HIGHER-ORDER-ACCURATE UPWIND SCHEMES FOR SOLVING THE COMPRESIBLE EULER AND NAVIER-STOKES EQUATIONS International-presentation

Fourth International Symposium on CFD　1991/09
UNSTEADY NAVIER-STOKES SIMULATION OF TURBULENT FLOWS THROUGH A SUPERSONIC COMPRESSOR CASCADE International-presentation

First ASME-JSME Fluids Engineering Conference　1991/06
Numerical Simulation of Unsteady Turbulent Flow through Transonic and Supersonic Cascades International-presentation

12th International Conference on Numerical Methods in Fluid Dynamics　1990/07
A Streamwise TVD Scheme for Solving the Compressible Euler Equations International-presentation

Third International Conference on Hyperbolic Problems　1990/06
A NUMERICAL METHOD FOR SOLVING THE UNSTEADY COMPRESSIBLE NAVIER-STOKES EQUATIONS International-presentation

International Symposium on Computational Fluid Dynamics　1989/08

Show all Show first 5

Media Coverage 18

東北大、発電用ガスタービン用のデジタルツインをスパコン「AOBA」上に構築

TECH+

2023/07/03

Type: Internet
【東北大学】発電用ガスタービンのデジタルツインをスーパーコンピュータ上で実現

HPCwire JAPAN

2023/06/30

Type: Internet
東北大、発電用ガスタービンのデジタルツインをスーパーコンピュータ上で実現

日本経済新聞　電子版

2023/06/30

Type: Newspaper, magazine
発電用ガスタービンのデジタルツインをスーパーコンピュータ上で実現～脱炭素デジタル社会の電力安定供給に貢献～

東北大学　プレスリリース

2023/06/30

Type: Internet
スーパーコンピュータで発電用ガスタービンの数値シミュレーションを高速化

MONOist　https://monoist.atmarkit.co.jp/mn/articles/2110/27/news045.html

2021/10/27

Type: Internet
東北大とNEC、スーパーコンピューターでガスタービンの数値シミュレーションを高速化

Yahoo ニュース　https://news.yahoo.co.jp/articles/d7e90ba92ced94cb0b97a810875933ca4c43cc51

2021/10/19

Type: Internet
東北大とNEC、スーパーコンピューターでガスタービンの数値シミュレーションを高速化

ZDNet Japan　https://japan.zdnet.com/article/35178217/

2021/10/19

Type: Internet
東北大とＮＥＣ、発電用ガスタービンスパコンで数値予測高速化

日刊工業新聞

2021/10/19

Type: Newspaper, magazine
NEC：東北大学と共同で、スーパーコンピュータを活用した発電用ガスタービンの数値シミュレーション高速化技術を開発

モーターファン　https://motor-fan.jp/tech/article/6193/

2021/10/18

Type: Newspaper, magazine
NEC 東北大学世界最速で数値解析発電用GT開発に利用

電気新聞

2021/10/18

Type: Newspaper, magazine
東北大とNEC、スーパーコンピュータを活用した発電用ガスタービンの数値シミュレーション高速化技術を開発

日本経済新聞　電子版

2021/10/15

Type: Newspaper, magazine
東北大学とNEC、スーパーコンピュータを活用した発電用ガスタービンの数値シミュレーション高速化技術を開発

NEC　プレスリリース

2021/10/15

Type: Internet
東北大学とNEC、スーパーコンピュータを活用した発電用ガスタービンの数値シミュレーション高速化技術を開発～高速かつ高精度なデジタルツインシミュレーションを実現し、電力の安定供給と発電効率の向上に貢献～

東北大学　プレスリリース

2021/10/15
東北大学とNEC、スーパーコンピュータを活用した発電用ガスタービンの数値シミュレーション高速化技術を開発

財経新聞　https://www.zaikei.co.jp/releases/1447235/

2021/10/15

Type: Newspaper, magazine
東北大学とNEC、スーパーコンピュータを活用した発電用ガスタービンの数値シミュレーション高速化技術を開発

スマートジャパン　https://release.itmedia.co.jp/release/sj/2021/10/15/380c54d8878a983af18ecad2cdd36d34.html

2021/10/15

Type: Internet
東北大学とNEC、スーパーコンピュータを活用した発電用ガスタービンの数値シミュレーション高速化技術を開発

excite ニュース　https://www.excite.co.jp/news/article/Jcn_76570274/?p=2

2021/10/15

Type: Internet
東北大学とNEC、スーパーコンピュータを活用した発電用ガスタービンの数値シミュレーション高速化技術を開発

IoTNEWS　https://iotnews.jp/archives/193314

2021/10/15

Type: Internet
火力発電の損傷予測東北大など、修繕時期把握

日本経済新聞

2021/10/15

Type: Newspaper, magazine

Show all Show first 5