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Hayakawa Lab
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The lab studies the combustion of hydrogen and ammonia under high-speed and high-pressure conditions.
AboutAbout the lab
Understanding the combustion phenomena of carbon-free fuels.
The Hayakawa Lab studies combustion phenomena in the High-Speed Reacting Flow research division of the Institute of Fluid Science.
The lab aims to put to use carbon-free fuels such as hydrogen and ammonia, which emit no carbon dioxide when burned.
It elucidates combustion in detail from every aspect of flow, thermophysical properties, and chemical reactions, and connects the results to applications in practical combustion devices.
The research makes use of some of the world's leading facilities, including combustion tests in a supersonic wind tunnel and combustion experiments in high-pressure environments.
Key terms
- Carbon-free fuel
- Fuels such as hydrogen and ammonia that emit no carbon dioxide when burned
- Scramjet engine
- An engine that burns fuel directly in a supersonic airflow and needs no mechanical compressor
- OH-PLIF
- A measurement technique that images the flame shape by illuminating OH in the flame with a laser so that it glows
NewsLab news
Joint research with the National Institute of Advanced Industrial Science and Technology and Kyushu University wins the Technology Award of the Combustion Society of Japan
Paper by a former Project Assistant Professor selected for a Distinguished Paper Award
Associate Professor Hayakawa wins the Young Scientists' Prize of the Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology
Paper by former researchers wins the Paper Award of the Combustion Society of Japan
ResearchResearch themes
Achieving a decarbonized society requires making jet engines and reciprocating engines more efficient and switching to carbon-free fuels such as hydrogen and ammonia. The lab clarifies combustion, the central challenge, from every aspect of flow, thermophysical properties, and chemical reactions, and uses some of the world's leading facilities to apply the results to practical combustion devices.
*Illustrative imageSupersonic Combustion
Targeting scramjet engines for hypersonic passenger aircraft, the lab works on combustion in supersonic airflow. Sustaining stable combustion is the challenge, and it is studied through both combustion experiments using wind tunnel facilities and numerical analysis on supercomputers.
*Illustrative imageSpray and Combustion in Aircraft Gas Turbines
The combustors of aircraft engines, whose internal state changes in complex ways in operating environments, are difficult to understand through numerical analysis. The lab works to clarify the phenomena inside the combustor through experiments that come close to real operating conditions.
*Illustrative imageLaser Diagnostics of Rocket Engines
Combustion in rocket engines takes place in harsh environments of over 3000 K and over 10 MPa. Using laser diagnostics such as OH-PLIF and LITGS, the lab aims to image flame shapes accurately and obtain quantitative data such as temperature.
*Illustrative imageAmmonia Gas Turbine Combustion
Alongside fundamental research, the lab studies burning ammonia in environments close to future use, such as gas turbines for power generation. It also performs numerical analysis under conditions very close to the experiments, and works to elucidate the mechanisms of the phenomena from the experimental and computational results.
MembersFaculty
The Hayakawa Lab's members consist of faculty, technical staff, academic researchers, administrative and technical assistants, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorAkihiro Hayakawa
- Project Associate ProfessorK.D.Kunkuma A.Somarathne
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SURBLYS LabFaculty of Engineering, Department of Mechanical and Aerospace EngineeringMolecular thermofluid dynamicsThe information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “ISS-35 Chris Cassidy with Multi-user Droplet Combustion Apparatus” NASA / Public domain (cropped)
- Supersonic Combustion: “Hypersonic Research Engine in the Hypersonic Tunnel Facility (grc-1973-c-02625-2)” NASA / Public domain (cropped)
- Spray and Combustion in Aircraft Gas Turbines: “Core compressor and combustor of sectioned Rolls-Royce Turboméca Adour turbofan” Olivier Cleynen / CC BY-SA 3.0 (cropped)
- Laser Diagnostics of Rocket Engines: “RS-68 rocket engine test” NASA / Public domain (cropped)
- Ammonia Gas Turbine Combustion: “Gas Turbine Power Plant” Pro-Per Energy Services / CC BY-SA 4.0 (cropped)
- Related lab (Sato-Liu Lab): “Beloplotov (Discharge in SF6 100Torr Plus) DSC06680” Dmitry Beloplotov / CC BY-SA 4.0 (cropped)
- Related lab (Nakamura-Kanayama Lab): “Flamability of sugar test for recognizing organic and inorganic materials” A01709167 / CC BY-SA 4.0 (cropped)
- Related lab (Ohara Lab): “Unit Cell of Liquid Water” Cnrowley / CC BY-SA 4.0 (cropped)
- Related lab (SURBLYS Lab): “Simulated structure of the water hexane interface” Cnrowley / CC BY-SA 4.0 (cropped)
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