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Reactive Gas Dynamics Lab
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A combustion lab exploring ammonia and hydrogen combustion from fundamentals to practical systems.
AboutAbout the lab
Toward a sustainable energy society through carbon-neutral combustion
The Reactive Gas Dynamics Lab studies the combustion of ammonia, hydrogen, and e-fuels in a consistent way, from the fundamentals of chemical kinetics to practical energy systems.
Much of the world's primary energy still depends on fossil fuels, and the lab believes that decarbonizing combustion technology is important.
By combining high-pressure combustion experiments, optical measurements, and high-accuracy numerical analysis, the lab aims to realize low-emission and zero-emission combustion technologies.
At the Reactive Gas Dynamics Lab, students can work on both experimental research and advanced numerical analysis.
Key terms
- Reaction mechanism
- A representation of the chemical reactions that occur when a fuel burns, expressed as a combination of small individual reactions
- Flame propagation
- The spreading of a flame through unburned gas
- Atomization
- The breaking up of liquid fuel into fine droplets
NewsLab news
Assistant Professor Matsuda received the Encouragement Award of the Japan Society of Mechanical Engineers
A student received the Best Presentation Award of the Japan Society of Mechanical Engineers
Associate Professor Okafor received the Technology Award of the Combustion Society of Japan
A student received the Young Researcher Outstanding Presentation Fellow Award of the Japan Society of Mechanical Engineers
ResearchResearch themes
The lab pioneers next-generation combustion technologies for carbon-neutral fuels such as hydrogen and ammonia, aiming to improve the efficiency and performance of practical energy systems such as gas turbines, industrial furnaces, and reciprocating engines. By integrating experiments, measurements, and numerical analysis, it pursues both a fundamental understanding of combustion and engineering usefulness.
*Illustrative imageBuilding combustion reaction mechanism models
For ammonia and its fuel blends, the lab builds, optimizes, and validates detailed and reduced reaction mechanisms. The aim is to predict ignition, flame propagation, flame extinction, and emissions formation with high accuracy.
*Illustrative imageFundamentals of flame propagation
The lab studies the propagation of laminar and turbulent flames, burning velocity, flame stretch, and the interaction between turbulence and chemical reactions. This research provides knowledge that is essential for understanding advanced combustion systems and developing models.
*Illustrative imageBurner combustion and emission control
Using model burners under high-temperature and high-pressure conditions, the lab studies flame stabilization in gas turbines and industrial combustion equipment, as well as the formation and control of emissions such as NO, N2O, and NH3.
*Illustrative imageSpray and engine combustion
The lab studies liquid fuel injection, spray formation, flash boiling, and combustion processes, with a particular focus on liquid ammonia and engine applications. It targets systems in which fuel supply, atomization, and emissions are closely linked.
MembersFaculty
The members of the Reactive Gas Dynamics Lab consist of faculty, technical staff, and doctoral, master's, and undergraduate students.As of 2026
- Associate ProfessorEkenechukwu Chijioke Okafor
- Assistant ProfessorDai Matsuda
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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: “Flame from the burner of a gas stove” BogTar201213 / CC BY-SA 4.0 (cropped)
- Building combustion reaction mechanism models: “Candle flame by Shan Sheehan” Shan Sheehan / CC BY 2.0 (cropped)
- Fundamentals of flame propagation: “Bunsen burner flame types” Arthur Jan Fijałkowski / CC BY-SA 3.0 (cropped)
- Burner combustion and emission control: “The Burner ( )” Alexandre Boidron / CC BY 3.0 (cropped)
- Spray and engine combustion: “Internal combustion engine pistons of partial cross-sectional view” Mj-bird / CC BY-SA 3.0 (cropped)
- Related lab (エンジンシステム研究室): “Rear Piston Of Mario Kleff's Custom V-twin Pro Street Motorcycle Engine” Designer Mario Kleff / CC BY-SA 4.0 (cropped)
- Related lab (水素適合材料・破壊学研究室): “Toyota Mirai high-pressure hydrogen tank SAO” Mariordo (Mario Roberto Durán Ortiz) / CC BY-SA 4.0 (cropped)
- Related lab (流体
制御研究室): “Naruto whirlpools” Suicasmo / CC BY-SA 4.0 (cropped) - Related lab (水素製造プロセス研究室): “Unterschiedliche Keramische Multikanalelemente” Peter in s / Public domain (cropped)
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