Details of the Researcher

PHOTO

Somarathne Kapuruge Don Kunkuma Amila
Section
Institute of Fluid Science
Job title
Specially Appointed Associate Professor(Research)
e-Rad No.
91014695

Research History 2

  • 2024/09 - Present
    Tohoku University　Institute of Fluid Science　Specially Appointed Associate Professor

  • 2014/04 - 2024/09
    Tohoku University　Institute of Fluid Science

Education 5

  • Toyohashi University of Technology　Department of Mechanical Engineering　Doctor of Engineering

    2011/04 - 2014/03

  • Toyohashi University of Technology　Department of Mechanical Engineering　Master of Engineering

    2009/04 - 2011/03

  • Toyohashi University of Technology　Department of Mechanical Engineering　Research Student in Mechanical Engineering

    2008/04 - 2009/03

  • University of Moratuwa (Sri Lanka)　Chemical and Process Engineering　Chemical and Process Engineering

    1998/10 - 2003/08

  • Ananda College（Sri Lanka)　Physical Science Division　Pure Mathematics, Applied Mathematics, Physics and Chemistry

    1995/07 - 1998/07

Committee Memberships 2

  • 5th Ammonia Energy Symposium Chile, 2026　Scientific Committee Member

    2025/11 - 2026/10

  • 4th Ammonia Energy Symposium, Minnesota, USA, 2025　Scientific Committee Member

    2024/10 - 2025/10

Research Interests 5

  • High pressure Combustion

  • Liquid Ammonia Spray combustion

  • Fuel NOx emission reduction

  • Turbulent combustion Modelling

  • Ammonia Combustion

Research Areas 1

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Thermal engineering / Ammonia Combustion Modelling

Awards 3

  1. The Young Investigator Award of The 14th Asia-Pacific Conference on Combustion, Kaohsiung, Taiwan (2023)

    2025/05　Asia-Pacific Conference on Combustion

  2. Best paper Award

    2019/11

  3. 日本機械学会 熱工学部門講演論文表彰

    2018/09　日本機械学会

Papers 24

  1. Spray and Combustion Characteristics of Liquid Ammonia Using Pressure-swirl, Single-hole, and Three-hole Nozzles in a Swirling Burner Peer-reviewed

    Yi-Rong Chen, K.D.Kunkuma A. Somarathne, Gauthier Reibel, Akihiro Hayakawa, Taku Kudo, Hideaki Kobayashi

    Combustion and Flame　291　115088-115088　2026/09

    Publisher: Elsevier BV

    DOI： 10.1016/j.combustflame.2026.115088 　

    ISSN： 0010-2180

  2. Effects of wall heat loss on emission characteristics of liquid ammonia spray combustion using a swirling burner Peer-reviewed

    Yi-Rong Chen, Gauthier Reibel, Kohei Oku, Hirofumi Yamashita, Akihiro Hayakawa, Taku Kudo, Hisayoshi Ito, K. D. Kunkuma A. Somarathne, Hideaki Kobayashi

    Applications in Energy and Combustion Science　23　100370-100370　2025/09

    Publisher: Elsevier BV

    DOI： 10.1016/j.jaecs.2025.100370 　

    ISSN： 2666-352X

  3. Visualization of Liquid Ammonia Spray Using 2p-SLIPI and Comparison of Liquid Ammonia Spray and Gaseous Ammonia Combustion in a Swirl Combustor at Atmospheric Pressure Peer-reviewed

    Hirofumi Yamashita, Akihiro Hayakawa, Kohei Oku, Sophie Colson, Gauthier Reibel, Yi-rong Chen, K. D. Kunkuma A. Somarathne, Ekenechukwu C. Okafor, Taku Tsujimura, Shintaro Ito, Masahiro Uchida, Taku Kudo, Hideaki Kobayashi

    Fuel　371　131833　2024/09

    DOI： 10.1016/j.fuel.2024.131833 　

    ISSN： 0016-2361

  4. Optimum primary equivalence ratio for rich-lean two-stage combustion of non-premixed ammonia/methane/air and ammonia/hydrogen/air flames in a swirling flow

    Hirofumi Yamashita, Akihiro Hayakawa, Ekenechukwu C. Okafor, Sophie Colson, K. D. Kunkuma A. Somarathne, Taku Tsujimura, Shintaro Ito, Masahiro Uchida, Taku Kudo, Hideaki Kobayashi

    Fuel　368　131598-131598　2024/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.fuel.2024.131598 　

    ISSN： 0016-2361

  5. Towards the development of liquid ammonia/air spray combustion in a gas turbine-like combustor at moderately high pressure

    Kapuruge Don Kunkuma Amila Somarathne, Hirofumi Yamashita, Sophie Colson, Kohei Oku, Keito Honda, Ekenechukwu Chijioke Okafor, Akihiro Hayakawa, Taku Kudo, Hideaki Kobayashi

    Applications in Energy and Combustion Science　16　100215-100215　2023/12

    Publisher: Elsevier BV

    DOI： 10.1016/j.jaecs.2023.100215 　

    ISSN： 2666-352X

  6. Study on the effect of injection temperature and nozzle geometry on the flashing transition of liquid ammonia spray

    Sophie Colson, Hirofumi Yamashita, Kohei Oku, Kapuruge Don Kunkuma Amila Somarathne, Taku Kudo, Akihiro Hayakawa, Hideaki Kobayashi

    Fuel　348　128612-128612　2023/09

    Publisher: Elsevier BV

    DOI： 10.1016/j.fuel.2023.128612 　

    ISSN： 0016-2361

  7. Towards the development of liquid ammonia/air spray combustion in a Gas turbine-like combustor Peer-reviewed

    K. D. Kunkuma, A. Somarathne, Hirofumi Yamashita, Sophie Colson, Akihiro Hayakawa, Taku Kudo, Hideaki Kobayashi

    The 14th Asia-Pacific Conference on Combustion (ASPACC), Kaohsiung, Taiwan (2023), Paper No. 184.　2023/05

  8. Liquid Ammonia Spray Combustion and Emission Characteristics with Gaseous Hydrogen/air Co-firing Peer-reviewed

    Kapuruge Don, Kunkuma Amila Somarathne, Hirofumi Yamashita, Sophie Colson, H Kobayashi

    Conference: Asia-Pacific Conference on Combustion (ASPACC) 2021At: UAE　2021/12

  9. Flame stability and emissions characteristics of liquid ammonia spray co-fired with methane in a single stage swirl combustor

    Ekenechukwu C. Okafor, Hirofumi Yamashita, Akihiro Hayakawa, K. D.Kunkuma A. Somarathne, Taku Kudo, Taku Tsujimura, Masahiro Uchida, Shintaro Ito, Hideaki Kobayashi

    Fuel　287　2021/03/01

    DOI： 10.1016/j.fuel.2020.119433 　

    ISSN： 0016-2361

  10. Influence of wall heat loss on the emission characteristics of premixed ammonia-air swirling flames interacting with the combustor wall

    Ekenechukwu C. Okafor, Masaaki Tsukamoto, Akihiro Hayakawa, Kunkuma A. Somarathne, Taku Kudo, Taku Tsujimura, Hideaki Kobayashi

    Proceedings of the Combustion Institute　38　(4)　5139-5146　2021

    DOI： 10.1016/j.proci.2020.06.142 　

    ISSN： 1540-7489

  11. Effects of OH concentration and temperature on NO emission characteristics of turbulent non-premixed CH<inf>4</inf>/NH<inf>3</inf>/air flames in a two-stage gas turbine like combustor at high pressure

    Kapuruge Don Kunkuma Amila Somarathne, Ekenechukwu C. Okafor, Daiki Sugawara, Akihiro Hayakawa, Hideaki Kobayashi

    Proceedings of the Combustion Institute　38　(4)　5163-5170　2021

    DOI： 10.1016/j.proci.2020.06.276 　

    ISSN： 1540-7489

    eISSN： 1873-2704

  12. Control of NOx and other emissions in micro gas turbine combustors fuelled with mixtures of methane and ammonia

    Ekenechukwu C. Okafor, K. D. Kunkuma A. Somarathne, Rattanasupapornsak Ratthanan, Akihiro Hayakawa, Taku Kudo, Osamu Kurata, Norihiko Iki, Taku Tsujimura, Hirohide Furutani, Hideaki Kobayashi

    Combustion and Flame　211　406-416　2020/01

    DOI： 10.1016/j.combustflame.2019.10.012 　

    ISSN： 0010-2180

    eISSN： 1556-2921

  13. Emission characteristics of turbulent non-premixed ammonia/air and methane/air swirl flames through a rich-lean combustor under various wall thermal boundary conditions at high pressure

    Kapuruge Don Kunkuma Amila Somarathne, Ekenechukwu C. Okafor, Akihiro Hayakawa, Taku Kudo, Osamu Kurata, Norihiko Iki, Hideaki Kobayashi

    Combustion and Flame　210　247-261　2019/12

    DOI： 10.1016/j.combustflame.2019.08.037 　

    ISSN： 0010-2180

    eISSN： 1556-2921

  14. Emission characteristics of turbulent non-premixed CH_4/NH_3/air swirl flames through a rich-lean gas turbine-like combustor at high pressure.

    K. D. Kunkuma, A. Somarathne, Ekenechukwu C. Okafor, Akihiro Hayakawa, Taku Kudo, Hideaki Kobayashi

    The 12th Asia-Pacific Conference on Combustion (ASPACC), Fukuoka, Japan (2019), Paper No. 1189.　2019/07

  15. Towards the development of an efficient low-NOx ammonia combustor for a micro gas turbine

    Ekenechukwu C. Okafor, K. D.Kunkuma A. Somarathne, Akihiro Hayakawa, Taku Kudo, Osamu Kurata, Norihiko Iki, Hideaki Kobayashi

    Proceedings of the Combustion Institute　37　(4)　4597-4606　2019

    DOI： 10.1016/j.proci.2018.07.083 　

    ISSN： 1540-7489

  16. Science and technology of ammonia combustion

    Hideaki Kobayashi, Akihiro Hayakawa, K. D.Kunkuma A. Somarathne, Ekenechukwu C. Okafor

    Proceedings of the Combustion Institute　37　(1)　109-133　2019

    DOI： 10.1016/j.proci.2018.09.029 　

    ISSN： 1540-7489

  17. On the control of NOx emission from a micro gas turbine combustor fueled with mixtures of methane and ammonia

    Ekenechukwu C. Okafor, Rattanasupapornsak Ratthanan, K. A.D. Kunkuma Somarathne, Akihiro Hayakawa, Taku Kudo, Osamu Kurata, Norihiko Iki, Taku Tsujimura, Hideaki Kobayashi

    12th Asia-Pacific Conference on Combustion, ASPACC 2019　2019

  18. Modelling of ammonia/air non-premixed turbulent swirling flames in a gas turbine-like combustor at various pressures

    Kapuruge Don Kunkuma Amila Somarathne, Sophie Colson, Akihiro Hayakawa, Hideaki Kobayashi

    Combustion Theory and Modelling　22　(5)　973-997　2018/09/03

    DOI： 10.1080/13647830.2018.1468035 　

    ISSN： 1364-7830

    eISSN： 1741-3559

  19. Numerical study of a low emission gas turbine like combustor for turbulent ammonia/air premixed swirl flames with a secondary air injection at high pressure

    Kapuruge Don Kunkuma Amila Somarathne, Sotaro Hatakeyama, Akihiro Hayakawa, Hideaki Kobayashi

    International Journal of Hydrogen Energy　42　(44)　27388-27399　2017/11/02

    DOI： 10.1016/j.ijhydene.2017.09.089 　

    ISSN： 0360-3199

    eISSN： 1879-3487

  20. Experimental investigation of stabilization and emission characteristics of ammonia/air premixed flames in a swirl combustor

    Akihiro Hayakawa, Yoshiyuki Arakawa, Rentaro Mimoto, K. D.Kunkuma A. Somarathne, Taku Kudo, Hideaki Kobayashi

    International Journal of Hydrogen Energy　42　(19)　14010-14018　2017/05/11

    DOI： 10.1016/j.ijhydene.2017.01.046 　

    ISSN： 0360-3199

  21. Numerical investigation on the combustion characteristics of turbulent premixed ammonia/air flames stabilized by a swirl burner

    Kapuruge Don Kunkuma Amila Somarathne, Akihiro Hayakawa, Hideaki Kobayashi

    JOURNAL OF FLUID SCIENCE AND TECHNOLOGY　11　(4)　JFST0026-JFST0026　2016

    DOI： 10.1299/jfst.2016jfst0026 　

    ISSN： 1880-5558

    eISSN： 1880-5558

  22. Stabilization and emission characteristics of ammonia/air premixed flames in swirling flows

    A. Hayakawa, Y. Arakawa, R. Mimoto, K. D.K.A. Somarathne, T. Kudo, H. Kobayashi

    WHEC 2016 - 21st World Hydrogen Energy Conference 2016, Proceedings　626-627　2016

  23. Laminar burning velocity and Markstein length of ammonia/hydrogen/air premixed flames at elevated pressures

    Akinori Ichikawa, Akihiro Hayakawa, Yuichi Kitagawa, K. D. Kunkuma Amila Somarathne, Taku Kudo, Hideaki Kobayashi

    International Journal of Hydrogen Energy　40　(30)　9570-9578　2015/08/10

    DOI： 10.1016/j.ijhydene.2015.04.024 　

    ISSN： 0360-3199

  24. Numerical study of NOx reduction of turbulent non-premixed flames by combination of burner and furnace

    K. D.K.A. Somarathne, S. Noda

    Proceedings of the 9th Asia-Pacific Conference on Combustion, ASPACC 2013　2013

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Misc. 26

  1. Numerical investigation of liquid ammonia spray flame characteristics using a single hole nozzle in a swirling burner under various thermal wall conditions

    K. D. Kunkuma, A. Somarathne, Hirofumi Yamashita, Yi R. Chen, Reibel Gauthoer, Hisayoshi Ito, Taku Kudo, Akihiro Hayakawa, Hideaki Kobayashi

    The 11th JSME-KSME Thermal and Fluid Engineering Conference (TFEC11), Okinawa, Japan (2025), Paper No. JK-TFEC11-1117.　2025/10

  2. Stabilization of liquid ammonia flashing spray flames using a single-hole injector for thermal application.

    K. D. Kunkuma, A. Somarathne, Y. R. Chen, Hisayoshi Ito, Taku Kudo, Akihiro Hayakawa, Hideaki Kobayashi

    The 4th Symposium on Ammonia Energy (SoAE), Minneapolis, Minnesota, USA (2025), Paper No. 185.　2025/09

  3. Droplet size and temperature distributions of liquid ammonia sprays at various superheat levels using a hollow cone nozzle.

    K. D. Kunkuma, A. Somarathne, Y. R. Chen, Keito Honda, Taku Kudo, Akihiro Hayakawa, Hideaki Kobayashi

    The 3rd Symposium on Ammonia Energy (SoAE), Shanghai, China (2024), Paper No. A0356.　2024/09

  4. Numerical modeling of liquid ammonia flashing sprays at various superheat degrees

    K. D. Kunkuma, A. Somarathne, Y. R. Chen, Keito Honda, Taku Kudo, Akihiro Hayakawa, Hideaki Kobayashi

    The 40th International Symposium on Combustion, Milan, Italy (2024), Paper No. 145.　2024/08

  5. Numerical investigation of flash-boiling atomization characteristics of liquid-ammonia fuel at various superheat degrees

    K. D. Kunkuma, A. Somarathne, Hirofumi Yamashita, Kohei Oku, Keito Honda, Taku Kudo, Akihiro Hayakawa, Hideaki Kobayashi

    19th International Conference on Numerical Combustion, Kyoto, Japan (2024), Paper No. ICNC2024-1025.　2024/05

  6. The Temperature Characteristics of Liquid Ammonia Spray at High Pressures

    K. D. Kunkuma, A. Somarathne, Hirofumi Yamashita, Kohei Oku, Keito Honda, Taku Kudo, Akihiro Hayakawa, Hideaki Kobayashi

    The 20th International Conference on Flow Dynamics, Sendai, Japan (2023), Paper No. OS2-43.　2023/11

  7. The Characteristics of liquid ammonia sprays at various ambient pressures

    K. D. Kunkuma, A. Somarathne, Hirofumi Yamashita, Taku Kudo, Akihiro Hayakawa, Hideaki Kobayashi

    The 2nd Symposium on ammonia Energy, Orleans, France (2023), Paper No.64.　2023/09

  8. Emission Characteristics of Liquid Ammonia and Gaseous Ammonia Flames Co-fired with Gaseous Hydrogen in a Gas Turbine-like Combustor at Moderately High Pressure

    SOMARATHNE Kapuruge Don Kunkuma Amila, YAMASHITA Hirofumi, COLSON Sophie, HAYAKAWA Akihiro, KUDO Taku, KOBAYASHI Hideaki

    Proceedings. International Conference on Flow Dynamics (CD-ROM)　19th　2022

  9. Optimum Equivalence Ratio for Low NO and Unburned NH3 Emissions in Gaseous Ammonia Flames Co-fired with Methane or Hydrogen in a Swirling Flow

    Hirofumi Yamashita, Akihiro Hayakawa, Ekenechukwu C. Okafor, Sophie Colson, K. D. Kunkuma, A. Somarathne, Taku Tsujimura, Shintaro Ito, Masahiro Uchida, Taku Kudo, Hideaki Kobayashi

    The 13th Asia-Pacific Conference on Combustion (ASPACC), Abu Dhabi, UAE (2021), Paper No. M10-09.　2021/11

  10. Study on the role of excess enthalpy in the stabilization of ammonia/air premixed flames in a swirling flow.

    COLSON Sophie, SOMARATHNE Kapuruge Don Kunkuma Amila, SUGAWARA Daiki, HAYAKAWA Akihiro, KOBAYASHI Hideaki

    燃焼シンポジウム講演論文集(CD-ROM)　59th　2021

  11. Numerical Study on Effects of Ammonia Fuel Fraction in Liquid Ammonia/Hydrogen/air Co-combustion at High Pressure

    SOMARATHNE Kapuruge Don Kunkuma Amila, COLSON Sophie, HAYAKAWA Akihiro, KOBAYASHI Hideaki

    燃焼シンポジウム講演論文集(CD-ROM)　59th　2021

  12. Liquid Ammonia Spray Characteristics Using a Hollow Cone Nozzle at Various Ambient Pressures

    SOMARATHNE Kapuruge Don Kunkuma Amila, YAMASHITA Hirofumi, YAMASHITA Hirofumi, COLSON Sophie, HAYAKAWA Akihiro, KOBAYASHI Hideaki.

    Proceedings. International Conference on Flow Dynamics (CD-ROM)　18th　2021

  13. Numerical Investigation on Possibilities of Liquid Ammonia Spray Combustion in the Gas Turbine-like Combustors

    SOMARATHNE Kapuruge Don Kunkuma Amila, HAYAKAWA Akihiro, KOBAYASHI Hideaki

    燃焼シンポジウム講演論文集(CD-ROM)　58th　2020

  14. Effect of NH3 Addition into CH4/air Swirl Flames on NO Emission Characteristics

    SOMARATHNE Kapuruge Don Kunkuma Amila, HAYAKAWA Akihiro, KOBAYASHI Hideaki

    燃焼シンポジウム講演論文集(CD-ROM)　57th　2019

  15. Effect of wall heat transfer on emission characteristics of ammonia/air swirling flames in a gas turbine-like combustor

    K. D. Kunkuma, A. Somarathne, Hirofumi Yamashita, Sophie Colson, Akihiro Hayakawa and, Hideaki Kobayashi

    The 14th International Conference on Combustion and Energy Utilization /The 15th International Conference on Flow Dynamics, Sendai, Japan (2018), Paper No. OS2-3.6　15th　2018/11

  16. Effect of Wall Quenching of a Gas Turbine-like Combustor on Emission Characteristics of Ammonia/air Non-premixed Swirling Flames

    SOMARATHNE Kapuruge Don Kunkuma Amila, HAYAKAWA Akihiro, KOBAYASHI Hideaki

    燃焼シンポジウム講演論文集　56th　2018

  17. Effect of pressure on combustion characteristics of ammonia/air premixed turbulent flames in swirling flows

    Akihiro Hayakawa, Yoshiyuki Arakawa, K. D. Kunkuma, A. Somarathne, Taku Kudo, Hideaki Kobayashi

    The 9th JSME-KSME Thermal and Fluid Engineering Conference (TFEC9), Okinawa, Japan (2017), Paper No. 1174.　2017/10

  18. Combustion and emission characteristics of premixed and non-premixed ammonia/air turbulent swirl flames at high pressure and temperature

    K. D. Kunkuma, A. Somarathne, Akihiro Hayakawa, Hideaki Kobayashi

    The 26th International Colloquium on Dynamics of Explosions and Reactive Systems (ICDERS), Boston, USA (2017), Paper No. 997.　2017/08

  19. Numerical investigation on emission reduction characteristics of turbulent swirl flames for ammonia/air mixture

    K. D. Kunkuma, A. Somarathne, Ekenechukwu C. Okafor, Akihiro Hayakawa, Hideaki, Kobayashi

    The 36th International Symposium on Combustion, Seoul, South Korea (2016), Poster No. 123　2016/08

  20. Numerical Investigation on the Combustion Characteristics of Turbulent Premixed Swirl Flames for Ammonia/air Mixture

    K. D. Kunkuma, A. Somarathne, Ekenechukwu C. Okafor, Akihiro Hayakawa, Hideaki, Kobayashi

    The 12th International Conference on Flow Dynamics, Sendai, Japan (2015), Paper No. OS2-4.　2015/11

  21. Realization of the Effect of Self-dilution Characteristics in Confined Flames on NOx Abetment

    K.D. Kunkuma, A. Somarathne, Susumu Noda, Akihiro Hayakawa, Hideaki Kobayashi

    The 35th International Symposium on Combustion, San Francisco, California, USA (2014), Poster. 6　2014/08

  22. Numerical Study of the NOx Characteristics in Confined Turbulent Diffusion Flames

    K.D. Kunkuma, A. Somarathne, Susumu Noda

    The International Symposium on Eco-Topia Science 2013, Nagoya, Japan (2013), Paper No. 123.　2013/11

  23. Numerical investigation of the effect of self-dilution in confined turbulent non-premixed flames on $NO_x$ reduction.

    K. D. Kunkuma, A. Somarathne, Susumu Noda

    The 24th International Colloquium on Dynamics of Explosions and Reactive Systems (ICDERS), Taipei, Taiwan (2013), Paper No. 119.　2013/08

  24. NOx Reduction of Non-Premixed Flames by Combination of Burner and Furnaces

    SOMARATHNE Kapuruge Don Kunkuma Amila, PARWATHA I Gede, OGURI Shoichiro, NADA Yuzuru, ITO Takahiro, NODA Susumu

    Journal of Environment and Engineering　8　(1)　1-10　2013

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jee.8.1 　

    eISSN： 1880-988X

    More details Close

    This study proposes an idea of NOx reduction and high efficiency combustion by combination of burner and furnace. This is basically attributed to the use of entrainment of burnt gases to flame in furnace. The entrainment of burnt gases leads the dilution of flame and the recovery of heat to be exhausted. The phenomena are strongly related to the geometry of burner and furnace. The temperature, concentration, and flow field characteristics were investigated for piloted propane non-premixed flames in the cylindrical furnaces in terms of NOx emission. The effects of the furnace inner diameter, D1, air inlet velocity difference, ΔUa, and global equivalence ratio,φ, on NOx emission were investigated. Moreover, two kinds of materials: Pyrex glass and stainless steel were used as the furnace wall to evaluate the radiation effect through the comparison of the flame characteristics. The emission index of NOx, EINOx, decreases roughly with the increase of above parameters. This decrease is observed to be a consequence of dilution by the burnt gases and flame stretch. The dilution is attributed to the recirculation structure, which is formed at the bottom of the furnace. The flame stretch is related to the velocity difference, which is introduced by multiple air inlets. The EINOx of confined non-premixed flame is scaled by the parameter D1UFΔUa, which is proportional to Re,cDa-1. Here, UF is the fuel velocity, Re,c is the furnace Reynolds number reflecting the turbulence in the furnace, and Da is the Damköhler number reflecting the flame stretch. The parameter D1UFΔUa is related linearly to the volume flow rate entrained in to the flame. Thus, this study verified that the EINOx of confined non-premixed flame is dominated primarily from the entrainment of burnt gases by the recirculation vortex and secondarily by the turbulence at the flame boundary, which is generated by the air velocity difference. In addition, it is found that under present experimental conditions, the radiation effect on the EINOx is small and constant with respect to the parameters. Thus, this idea has a potential for practical applications.

  25. Numerical Evaluation of the Effect of Global Equivalence Ratio on Confined Turbulent Non-Premixed Flames

    SOMARATHNE Kapuruge Don Kunkuma Amila, NODA Susumu

    Journal of Environment and Engineering　8　(1)　11-26　2013

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jee.8.11 　 10.1299/jfst.2014jfst0039_references_DOI_9J3rNJF1atH5immliLW9pdnsWxZ 　

    eISSN： 1880-988X

    More details Close

    The control of nitrogen oxides (NOx) is currently a major issue in designing an effective combustion system because NOx has several detrimental effects on the environment and human health. However, it is difficult to understand NOx formation processes in flames because of complicated interactions between the flow and chemistry. In this study, a partially-stirred-reactor combustion model is implemented in the OpenFOAM CFD tool to model confined turbulent non-premixed propane jet flames, and the NOx emission is evaluated in terms of the global equivalence ratio. The code solves Reynolds-Averaged Navier Stokes equations on an unstructured mesh in a cylindrical coordinate system. The computational predictions of scalar and flow fields in the combustion chamber are extensively compared to experimental measurements, and they show a good agreement. The oxidation and heat-release rates of propane are computationally evaluated, and they are used to verify the scalar fields such as temperature and mole fractions of species. The increase in the global equivalence ratio increases the maximum temperature of the furnace because of the enhancement of reaction rate, and thereby, leads to the enrichment of the NOx emission.

  26. Simulation of Confined Turbulent Non-Premixed Combustion with the Partially Stirred Reactor (PaSR) Model

    SOMARATHNE K.D.Kunkuma Amila, ITO Takahiro, NODA Susumu

    日本機械学会年次大会講演論文集(CD-ROM)　2012　2012

    ISSN： 2424-2667

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Research Projects 1

  1. Clarifications of dynamics and flame-wall interaction mechanisms of liquid ammonia spray combustion at high pressure

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2025/04/01 - 2029/03/31