Abstract
Experimental results are presented in favor of the existence of fast and slow modes of the propagation of the combustion front in diluted heterogeneous mixtures of reactive particles. A theoretical combustion model is proposed to explain the existence of these modes. The transition from the fast to the slow mode, which occurs in a narrow range of the degree of dilution of the mixture by inert powder, is associated with the break of a percolation cluster formed by reagent particles that are in direct contact with each other. After such a break of the cluster, the thermal energy of combusting particles is still insufficient to maintain the combustion wave. A sharp decrease in the front velocity in this case is associated with the necessity of heating inert regions inevitably appearing in its path.
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Original Russian Text © P.S. Grinchuk, O.S. Rabinovich, A.S. Rogachev, N.A. Kochetov, 2006, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2006, Vol. 84, No. 1, pp. 13–17.
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Grinchuk, P.S., Rabinovich, O.S., Rogachev, A.S. et al. Fast and slow modes of the propagation of the combustion front in heterogeneous systems. Jetp Lett. 84, 11–15 (2006). https://doi.org/10.1134/S0021364006130030
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DOI: https://doi.org/10.1134/S0021364006130030