Supergravity effects on flame propagation and structure in hydrogen/air mixtures

In the current work, we investigated hydrogen/air flame propagation under supergravity conditions. Results show that when gravity is in the same/opposite direction as flame propagation, it leads to acceleration/deceleration of the flame, and that such an effect could substantially modify the flame p...

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Bibliographic Details
Published inActa mechanica Sinica Vol. 40; no. 6
Main Authors Liang, Wenkai, Law, Chung K.
Format Journal Article
LanguageEnglish
Published Beijing The Chinese Society of Theoretical and Applied Mechanics; Institute of Mechanics, Chinese Academy of Sciences 01.06.2024
Springer Nature B.V
EditionEnglish ed.
Subjects
Acceleration
Adiabatic flow
Classical and Continuum Physics
Computational Intelligence
Engineering
Engineering Fluid Dynamics
Equivalence ratio
Flame propagation
Flame speed
Flame temperature
Hydrogen
Mixtures
Research Paper
Supergravity
Theoretical and Applied Mechanics
Flame stretch
Flame acceleration
Laminar flame speed
Hydrogen
Supergravity
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Summary:In the current work, we investigated hydrogen/air flame propagation under supergravity conditions. Results show that when gravity is in the same/opposite direction as flame propagation, it leads to acceleration/deceleration of the flame, and that such an effect could substantially modify the flame propagation and structure at high gravity levels. Furthermore, for the absolute and relative flame propagation speeds, the gravity-affected flame speed shows opposite trends as the absolute flame speed is more affected by the local induced flow field, while the relative flame speeds are controlled by the super-adiabatic or sub-adiabatic flame temperature. The gravity-affected thermal and chemical flame structures are also examined through the influence of the mixture equivalence ratio, pressure, and flame stretch.
ISSN:0567-7718
1614-3116
DOI:10.1007/s10409-024-24098-x