MATEC Web Conf.
Volume 209, 2018International Conference on Combustion Physics and Chemistry (ComPhysChem’18)
|Number of page(s)||5|
|Published online||02 October 2018|
Three-dimensional simulation of combustion, detonation and deflagration to detonation transition processes
Moscow M.V. Lomonosov State University, Moscow 119991, Leninskie Gory, 1, Russian Federation
2 Federal Science Center “Scientific Research Institute for System Analysis of Russian Academy of Sciences”, Moscow 117218, Nakhimovskiy, 36-1, Russian Federation
* Corresponding author: firstname.lastname@example.org
The paper presents results of numerical and experimental investigation of mixture ignition and detonation onset in shock wave reflected from inside a wedge. Contrary to existing opinion of shock wave focusing being the mechanism for detonation onset in reflection from a wedge or cone, it was demonstrated that along with the main scenario there exists a transient one, under which focusing causes ignition and successive flame acceleration bringing to detonation onset far behind the reflected shock wave. Several different flow scenarios manifest in reflection of shock waves all being dependent on incident shock wave intensity: reflecting of shock wave with lagging behind combustion zone, formation of detonation wave in reflection and focusing, and intermediate transient regimes. Comparison of numerical and experimental results made it possible to validate the developed 3-D transient mathematical model of chemically reacting gas mixture flows incorporating hydrogen – air mixtures.
© The Authors, published by EDP Sciences, 2018
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