早川 晃弘

研究成果

年別の研究成果 2008 2017 2019 2021 2022

• 1740 被引用数
• 18 h-index
• 40 Article
• 11 Paper
• 9 Conference contribution
• 5 Conference article

年別の研究成果

年別の研究成果

検索結果

• 2022

  Effects of initial mixture temperature and pressure on laminar burning velocity and Markstein length of ammonia/air premixed laminar flames

  Kanoshima, R., Hayakawa, A., Kudo, T., Okafor, E. C., Colson, S., Ichikawa, A., Kudo, T. & Kobayashi, H., 2022 2 15, In: Fuel. 310, 122149.

  研究成果: Article › 査読

  • Laminar Flame 100%
  • Ammonia 68%
  • Flame 56%
  • Length 38%
  • Pressure 37%

• Measurement of the laminar burning velocity and kinetics study of the importance of the hydrogen recovery mechanism of ammonia/hydrogen/air premixed flames

  Gotama, G. J., Hayakawa, A., Okafor, E. C., Kanoshima, R., Hayashi, M., Kudo, T. & Kobayashi, H., 2022 2, In: Combustion and Flame. 236, 111753.

  研究成果: Article › 査読

  • Premixed Flame 100%
  • premixed flames 81%
  • Ammonia 72%
  • ammonia 68%
  • flames 61%
  1 被引用数 (Scopus)
• 2021

  Experimental and Numerical Study of NH₃/CH₄ Counterflow Premixed and Non-premixed Flames for Various NH₃ Mixing Ratios

  Colson, S., Hirano, Y., Hayakawa, A., Kudo, T., Kobayashi, H., Galizzi, C. & Escudié, D., 2021, In: Combustion science and technology. 193, 16, p. 2872-2889 18 p.

  研究成果: Article › 査読

  • Premixed Flame 100%
  • counterflow 85%
  • mixing ratios 82%
  • premixed flames 81%
  • Ammonia 72%
  5 被引用数 (Scopus)

• Experimental and numerical study of product gas characteristics of ammonia/air premixed laminar flames stabilized in a stagnation flow

  Hayakawa, A., Hirano, Y., Okafor, E. C., Yamashita, H., Kudo, T. & Kobayashi, H., 2021 1, In: Proceedings of the Combustion Institute. 38, 2, p. 2409-2417 9 p.

  研究成果: Article › 査読

  • Laminar Flame 100%
  • stagnation flow 97%
  • laminar flames 82%
  • premixed flames 77%
  • Ammonia 68%
  2 被引用数 (Scopus)

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

  Okafor, E. C., Yamashita, H., Hayakawa, A., Somarathne, K. D. K. A., Kudo, T., Tsujimura, T., Uchida, M., Ito, S. & Kobayashi, H., 2021 3 1, In: Fuel. 287, 119433.

  研究成果: Article › 査読

  • Ammonia 100%
  • Combustors 95%
  • Spray 87%
  • Methane 87%
  • Flame 81%
  10 被引用数 (Scopus)

• Laminar Burning Velocity and Markstein Length of CH₄/CO₂/Air Premixed Flames at Various Equivalence Ratios and CO₂ Concentrations Under Elevated Pressure

  Anggono, W., Hayakawa, A., Okafor, E. C., Gotama, G. J. & Wongso, S., 2021, In: Combustion science and technology. 193, 14, p. 2369-2388 20 p.

  研究成果: Article › 査読

  • Premixed Flame 100%
  • premixed flames 81%
  • Dilution 74%
  • dilution 67%
  • equivalence 64%
  4 被引用数 (Scopus)

• Stabilization mechanisms of an ammonia/methane non-premixed jet flame up to liftoff

  Colson, S., Kuhni, M., Hayakawa, A., Kobayashi, H., Galizzi, C. & Escudié, D., 2021 12, In: Combustion and Flame. 234, 111657.

  研究成果: Article › 査読

  • jet flames 100%
  • Jet 81%
  • Ammonia 81%
  • ammonia 77%
  • Methane 71%
• 2020

  Combustion characteristics of a cavity flameholder with a burned-gas injector at the cavity bottom wall in a scramjet model combustor

  Yamaguchi, T., Hizawa, T., Yugami, Y., Hasegawa, M., Kudo, T., Hayakawa, A. & Kobayashi, H., 2020, In: Transactions of the Japan Society for Aeronautical and Space Sciences. 63, 4, p. 160-171 12 p.

  研究成果: Article › 査読

  Open Access

  • supersonic combustion ramjet engines 100%
  • combustion chambers 74%
  • injectors 69%
  • Combustors 68%
  • Boundary layers 63%

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

  Okafor, E. C., Somarathne, K. D. K. A., Ratthanan, R., Hayakawa, A., Kudo, T., Kurata, O., Iki, N., Tsujimura, T., Furutani, H. & Kobayashi, H., 2020 1, In: Combustion and Flame. 211, p. 406-416 11 p.

  研究成果: Article › 査読

  • gas turbines 100%
  • combustion chambers 93%
  • Ammonia 90%
  • Combustors 86%
  • ammonia 86%
  52 被引用数 (Scopus)

• Flow field and combustion field control using pylons installed upstream of a cavity in supersonic flow

  Hizawa, T., Yamaguchi, T., Murata, K., Yugami, Y., Hasegawa, M., Kudo, T., Hayakawa, A. & Kobayashi, H., 2020, In: Transactions of the Japan Society for Aeronautical and Space Sciences. 63, 2, p. 50-61 12 p.

  研究成果: Article › 査読

  Open Access

  • pylons 100%
  • jet flow 77%
  • Supersonic flow 73%
  • supersonic flow 70%
  • upstream 56%

• Turbulent burning velocity of ammonia/oxygen/nitrogen premixed flame in O₂-enriched air condition

  Xia, Y., Hashimoto, G., Hadi, K., Hashimoto, N., Hayakawa, A., Kobayashi, H. & Fujita, O., 2020 5 15, In: Fuel. 268, 117383.

  研究成果: Article › 査読

  • Premixed Flame 100%
  • Ammonia 72%
  • Nitrogen 62%
  • Turbulence 57%
  • Oxygen 54%
  16 被引用数 (Scopus)
• 2019

  Burning velocity and flame structure of CH ₄ /NH ₃ /air turbulent premixed flames at high pressure

  Ichikawa, A., Naito, Y., Hayakawa, A., Kudo, T. & Kobayashi, H., 2019 3 8, In: International Journal of Hydrogen Energy. 44, 13, p. 6991-6999 9 p.

  研究成果: Article › 査読

  • turbulent flames 100%
  • premixed flames 98%
  • Ammonia 87%
  • ammonia 83%
  • methylidyne 81%
  22 被引用数 (Scopus)

• Development of a wide range-operable, rich-lean low-NOx combustor for NH ₃ fuel gas-turbine power generation

  Kurata, O., Iki, N., Inoue, T., Matsunuma, T., Tsujimura, T., Furutani, H., Kawano, M., Arai, K., Okafor, E. C., Hayakawa, A. & Kobayashi, H., 2019, In: Proceedings of the Combustion Institute. 37, 4, p. 4587-4595 9 p.

  研究成果: Article › 査読

  • gas turbines 100%
  • Gas fuels 97%
  • combustion chambers 93%
  • Combustors 86%
  • Gas turbines 74%
  64 被引用数 (Scopus)

• 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

  Somarathne, K. D. K. A., C. Okafor, E., Hayakawa, A., Kudo, T., Kurata, O., Iki, N. & Kobayashi, H., 2019 12, In: Combustion and Flame. 210, p. 247-261 15 p.

  研究成果: Article › 査読

  • combustion chambers 100%
  • Ammonia 96%
  • Combustors 92%
  • ammonia 92%
  • Methane 84%
  33 被引用数 (Scopus)

• Extinction limits of an ammonia/air flame propagating in a turbulent field

  Ichimura, R., Hadi, K., Hashimoto, N., Hayakawa, A., Kobayashi, H. & Fujita, O., 2019 6 15, In: Fuel. 246, p. 178-186 9 p.

  研究成果: Article › 査読

  • Ammonia 100%
  • Flame 81%
  • Lewis Number 62%
  • Air 51%
  • Turbulence 49%
  21 被引用数 (Scopus)

• Measurement and modelling of the laminar burning velocity of methane-ammonia-air flames at high pressures using a reduced reaction mechanism

  Okafor, E. C., Naito, Y., Colson, S., Ichikawa, A., Kudo, T., Hayakawa, A. & Kobayashi, H., 2019 6, In: Combustion and Flame. 204, p. 162-175 14 p.

  研究成果: Article › 査読

  • Ammonia 100%
  • ammonia 95%
  • Methane 87%
  • methane 85%
  • flames 84%
  78 被引用数 (Scopus)

• OH planar laser-induced fluorescence measurement for H₂/O₂ jet diffusion flames in rocket combustion condition up to 7.0 MPa

  Higuchi, Y., Takeuchi, K., Nunome, Y., Tomioka, S., Sakaki, K., Kudo, T., Hayakawa, A. & Kobayashi, H., 2019, In: Journal of Thermal Science and Technology. 14, 2, 19-00196.

  研究成果: Article › 査読

  Open Access

  • Diffusion Flame 100%
  • jet flames 92%
  • diffusion flames 85%
  • Fluorescence 81%
  • Laser Induced Fluorescence Spectroscopy 78%
  1 被引用数 (Scopus)

• Quantitative measurement of temperature in oxygen enriched CH ₄ /O ₂ /N ₂ premixed flames using Laser Induced Thermal Grating Spectroscopy (LITGS) up to 1.0MPa

  Hayakawa, A., Yamagami, T., Takeuchi, K., Higuchi, Y., Kudo, T., Lowe, S., Gao, Y., Hochgreb, S. & Kobayashi, H., 2019, In: Proceedings of the Combustion Institute. 37, 2, p. 1427-1434 8 p.

  研究成果: Article › 査読

  • Premixed Flame 100%
  • premixed flames 81%
  • Spectroscopy 75%
  • methylidyne 67%
  • Flame 59%
  3 被引用数 (Scopus)

• Science and technology of ammonia combustion

  Kobayashi, H., Hayakawa, A., Somarathne, K. D. K. A. & Okafor, E. C., 2019, In: Proceedings of the Combustion Institute. 37, 1, p. 109-133 25 p.

  研究成果: Article › 査読

  • Ammonia 100%
  • ammonia 95%
  • Fuel 29%
  • gas turbines 25%
  • Hydrogen 22%
  275 被引用数 (Scopus)

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

  Okafor, E. C., Somarathne, K. D. K. A., Hayakawa, A., Kudo, T., Kurata, O., Iki, N. & Kobayashi, H., 2019, In: Proceedings of the Combustion Institute. 37, 4, p. 4597-4606 10 p.

  研究成果: Article › 査読

  • gas turbines 100%
  • combustion chambers 93%
  • Ammonia 90%
  • Combustors 86%
  • ammonia 86%
  78 被引用数 (Scopus)
• 2018

  Development and verification of a supersonic nozzle with a rectangular cross section at a Mach number of 2.8 for a scramjet model combustor

  Yamaguchi, T., Hizawa, T., Ichikawa, T., Kudo, T., Hayakawa, A. & Kobayashi, H., 2018 1 1, In: Journal of Thermal Science and Technology. 13, 2, 18-00393.

  研究成果: Article › 査読

  Open Access

  • Mach Number 100%
  • supersonic combustion ramjet engines 80%
  • supersonic nozzles 76%
  • Nozzle 63%
  • combustion chambers 59%
  3 被引用数 (Scopus)

• Development of a water-cooled multi-hole calibration burner for optical measurements of flames with high pressures and temperatures

  Takeuchi, K., Nunome, Y., Tomioka, S., Tomita, T., Kudo, T., Hayakawa, A. & Kobayashi, H., 2018, In: Journal of Thermal Science and Technology. 13, 1, JTST0001.

  研究成果: Article › 査読

  • Burner 100%
  • burners 87%
  • Fuel burners 79%
  • optical measurement 77%
  • flames 69%
  3 被引用数 (Scopus)

• Experimental and numerical study of the laminar burning velocity of CH₄–NH₃–air premixed flames

  Okafor, E. C., Naito, Y., Colson, S., Ichikawa, A., Kudo, T., Hayakawa, A. & Kobayashi, H., 2018, In: Combustion and Flame. 187, p. 185-198 14 p.

  研究成果: Article › 査読

  • Premixed Flame 100%
  • premixed flames 81%
  • Ammonia 72%
  • ammonia 68%
  • Fuel 39%
  148 被引用数 (Scopus)

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

  Somarathne, K. D. K. A., Colson, S., Hayakawa, A. & Kobayashi, H., 2018 9 3, In: Combustion Theory and Modelling. 22, 5, p. 973-997 25 p.

  研究成果: Article › 査読

  • Ammonia 100%
  • Gas Turbine 97%
  • Premixed Flame 95%
  • Flame 77%
  • swirling 72%
  30 被引用数 (Scopus)

• Total temperature estimation of a hydrogen/air burned-gas torch igniter for a scramjet combustor

  Yamaguchi, T., Hizawa, T., Ichikawa, T., Kudo, T., Hayakawa, A. & Kobayashi, H., 2018, In: Journal of Thermal Science and Technology. 13, 2, 18-00208.

  研究成果: Article › 査読

  Open Access

  • igniters 100%
  • supersonic combustion ramjet engines 97%
  • Torch 91%
  • torches 86%
  • combustion chambers 72%
  4 被引用数 (Scopus)
• 2017

  Application of OH(2,0) band excitation Planar Laser-induced Fluorescence to high-pressure H₂/O₂ jet flames for rocket combustion

  Takeuchi, K., Nunome, Y., Tomioka, S., Tomita, T., Kudo, T., Hayakawa, A. & Kobayashi, H., 2017, In: Transactions of the Japan Society for Aeronautical and Space Sciences. 60, 2, p. 116-123 8 p.

  研究成果: Article › 査読

  • Chemiluminescence 100%
  • jet flames 93%
  • laser induced fluorescence 91%
  • chemiluminescence 90%
  • Fluorescence 81%
  4 被引用数 (Scopus)

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

  Hayakawa, A., Arakawa, Y., Mimoto, R., Somarathne, K. D. K. A., Kudo, T. & Kobayashi, H., 2017 5 11, In: International Journal of Hydrogen Energy. 42, 19, p. 14010-14018 9 p.

  研究成果: Article › 査読

  • premixed flames 100%
  • combustion chambers 92%
  • Ammonia 89%
  • Combustors 84%
  • ammonia 84%
  89 被引用数 (Scopus)

• 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

  Somarathne, K. D. K. A., Hatakeyama, S., Hayakawa, A. & Kobayashi, H., 2017 11 2, In: International Journal of Hydrogen Energy. 42, 44, p. 27388-27399 12 p.

  研究成果: Article › 査読

  • premixed flames 100%
  • gas turbines 98%
  • combustion chambers 92%
  • Ammonia 89%
  • Combustors 84%
  86 被引用数 (Scopus)

• Performances and emission characteristics of NH₃-air and NH₃-CH₄-air combustion gas-turbine power generations

  Kurata, O., Iki, N., Matsunuma, T., Inoue, T., Tsujimura, T., Furutani, H., Kobayashi, H. & Hayakawa, A., 2017, In: Proceedings of the Combustion Institute. 36, 3, p. 3351-3359 9 p.

  研究成果: Article › 査読

  • gas turbines 100%
  • Gas turbines 74%
  • Power generation 72%
  • Fuel 69%
  • air 50%
  135 被引用数 (Scopus)

• Simultaneous, two-camera, 2D gas-phase temperature and velocity measurements by thermographic particle image velocimetry with ZnO tracers

  Fan, L., Gao, Y., Hayakawa, A. & Hochgreb, S., 2017 4 1, In: Experiments in Fluids. 58, 4, 34.

  研究成果: Article › 査読

  • Particle Image Velocimetry 100%
  • Velocity Measurement 91%
  • Phase Measurement 91%
  • Zinc Oxide 86%
  • Temperature Measurement 80%
  10 被引用数 (Scopus)
• 2016

  Effects of incident shockwave on flame-holding downstream of ramp injector in supersonic flow

  Iwamura, Y., Yamaguchi, T., Hayakawa, A., Kudo, T. & Kobayashi, H., 2016 1 1, In: Transactions of the Japan Society for Aeronautical and Space Sciences. 59, 2, p. 64-70 7 p.

  研究成果: Article › 査読

  • Supersonic flow 100%
  • supersonic flow 95%
  • ramps 87%
  • injectors 82%
  • flames 72%
  3 被引用数 (Scopus)

• Extinction characteristics of ammonia/air counterflow premixed flames at various pressures

  Colson, S., Hayakawa, A., Kudo, T. & Kobayashi, H., 2016, In: Journal of Thermal Science and Technology. 11, 3, JTST0048.

  研究成果: Article › 査読

  • Premixed Flame 100%
  • counterflow 85%
  • premixed flames 81%
  • Ammonia 72%
  • ammonia 68%
  16 被引用数 (Scopus)
• 2015

  Laminar burning velocity and Markstein length of ammonia/air premixed flames at various pressures

  Hayakawa, A., Goto, T., Mimoto, R., Arakawa, Y., Kudo, T. & Kobayashi, H., 2015 7 3, In: Fuel. 159, p. 98-106 9 p., 9373.

  研究成果: Article › 査読

  • Premixed Flame 100%
  • Ammonia 72%
  • Flame 50%
  • Length 40%
  • Pressure 39%
  182 被引用数 (Scopus)

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

  Ichikawa, A., Hayakawa, A., Kitagawa, Y., Kunkuma Amila Somarathne, K. D., Kudo, T. & Kobayashi, H., 2015 8 10, In: International Journal of Hydrogen Energy. 40, 30, p. 9570-9578 9 p.

  研究成果: Article › 査読

  • premixed flames 100%
  • Ammonia 89%
  • ammonia 84%
  • Hydrogen 66%
  • hydrogen 51%
  90 被引用数 (Scopus)
• 2014

  Effects of hydrogen concentration on premixed laminar flames of hydrogen-methane-air

  Okafor, E. C., Hayakawa, A., Nagano, Y. & Kitagawa, T., 2014 2 4, In: International Journal of Hydrogen Energy. 39, 5, p. 2409-2417 9 p.

  研究成果: Article › 査読

  • laminar flames 100%
  • premixed flames 93%
  • equivalence 74%
  • Methane 73%
  • methane 71%
  66 被引用数 (Scopus)
• 2012

  Analysis of turbulent burning velocity of spherically propagating premixed flame with effective turbulence intensity

  Hayakawa, A., Miki, Y., Nagano, Y. & Kitagawa, T., 2012, In: Journal of Thermal Science and Technology. 7, 4, p. 507-521 15 p.

  研究成果: Article › 査読

  • Premixed Flame 100%
  • Turbulence 95%
  • premixed flames 81%
  • turbulence 51%
  • Turbulent Flame 45%
  14 被引用数 (Scopus)
• 2011

  Combustion properties of hydrogen/air mixture with and without dilution

  Nagano, Y., Takeo, T., Tomari, K., Hayakawa, A., Kobayashi, S. & Kitagawa, T., 2011 1 1, In: SAE Technical Papers.

  研究成果: Article › 査読

  • Dilution 100%
  • Hydrogen 72%
  • hydrogen 70%
  • combustion 70%
  • Flame 53%

• Effects of CO₂ and N₂ dilutions on laminar and turbulent flame propagation

  Hayakawa, A., Miki, Y., Kobayashi, S., Nagano, Y. & Kitagawa, T., 2011 1 1, In: SAE Technical Papers.

  研究成果: Article › 査読

  • Turbulent Flame 100%
  • Laminar Flame 84%
  • Dilution 59%
  • Flame 47%
  • Exhaust gas recirculation 45%
  2 被引用数 (Scopus)
• 2010

  Effects of pressure on laminar and turbulent burning velocities of ethanol premixed flames

  Ohara, K., Tsukikawa, M., Araki, Y., Hayakawa, A., Kobayashi, S., Nagano, Y. & Kitagawa, T., 2010 12 1, In: Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy. 89, 11, p. 1088-1094 7 p.

  研究成果: Article › 査読

  • Ethanol 100%
  • Turbulence 25%
  • Internal combustion engines 13%
  • Air 7%
  • Experiments 5%
  1 被引用数 (Scopus)
• 2008

  Turbulent burning velocity of hydrogen-air premixed propagating flames at elevated pressures

  Kitagawa, T., Nakahara, T., Maruyama, K., Kado, K., Hayakawa, A. & Kobayashi, S., 2008 10, In: International Journal of Hydrogen Energy. 33, 20, p. 5842-5849 8 p.

  研究成果: Article › 査読

  • premixed flames 100%
  • Lewis numbers 66%
  • Hydrogen 66%
  • hydrogen 51%
  • air 49%
  100 被引用数 (Scopus)