Thermodiffusive Instabilities in Hydrogen Combustion
Lead Research Organisation:
NEWCASTLE UNIVERSITY
Department Name: School of Engineering
Abstract
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Organisations
Publications
Aspden A
(2024)
Three-dimensional phenomenology of freely-propagating thermodiffusively-unstable lean premixed hydrogen flames
in Proceedings of the Combustion Institute
Bae J
(2025)
Simultaneous imaging of OH and temperature in lean premixed hydrogen/air flames: Which marker for thermodiffusive instability?
in Proceedings of the Combustion Institute
Chaib O
(2026)
Normalization reveals the role of thermodiffusive effects in turbulent premixed hydrogen-methane flames
in Combustion and Flame
Howarth T
(2024)
Thermal diffusion, exhaust gas recirculation and blending effects on lean premixed hydrogen flames
in Proceedings of the Combustion Institute
Hunt E
(2026)
Thermodiffusively-unstable lean premixed hydrogen-methane blends: Phenomenology and empirical modelling
in Combustion and Flame
Hunt E
(2025)
Thermodiffusively-unstable lean premixed hydrogen flames: Length scale effects and turbulent burning regimes
in Combustion and Flame
Moitro A
(2026)
Direct numerical simulations of laboratory-scale thermodiffusively-unstable piloted Bunsen flames: Flame surface area, turbulent flame speed, and flame height
in Combustion and Flame
Russell G
(2025)
Turbulence-flame interactions in high-Karlovitz-number lean premixed hydrogen piloted jet flames
in Proceedings of the Combustion Institute
| Description | The project has used a combination of laboratory experiment and numerical simulation to investigate thermodiffusive effects in hydrogen/methane blended Bunsen flames. A dual-flame behaviour has been identified, where the hydrogen tends to burn intensely in positively-curved flame regions, and a slower methane flame burns in negatively-curved regions. Empirical flame speed models have been extended to describe blended fuels for freely-propagating and turbulence flames. It has been shown that observations in abstract canonical numerical configurations translate well to more realistic burners, and configuration-specific differences have been identified. |
| Exploitation Route | The empirical models describing thermodiffusively-unstable blends will be of great value to modellers and end-users of CFD for combustor design. |
| Sectors | Aerospace Defence and Marine Energy |