On the formation of new ignition kernels in the chemically active dispersed mixtures

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Ivanov, M.F.^1 ; Kiverin, A.D.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

关键词: Combustion regime;    Combustion waves;    Dispersed mixtures;    Gaseous mixture;    Hot products;    Micro particles;    Multi-kernel;    Polydisperse mixtures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012060/pdf
DOI  :  10.1088/1742-6596/653/1/012060

来源: IOP

【 摘 要 】

The specific features of the combustion waves propagating through the channels filled with chemically active gaseous mixture and non-uniformly suspended micro particles are studied numerically. It is shown that the heat radiated by the hot products, absorbed by the micro particles and then transferred to the environmental fresh mixture can be the source of new ignition kernels in the regions of particles' clusters. Herewith the spatial distribution of the particles determines the features of combustion regimes arising in these kernels. One can highlight the multi-kernel ignition in the polydisperse mixtures and ignition of the combustion regimes with shocks and detonation formation in the mixtures with pronounced gradients of microparticles concentration.