Abstract
Injection of a hot gas flow produced by an external source into a powdered explosive allows very fast (within a few microseconds) deflagration-to-detonation transition. Under this high-enthalpy initiation conditions, the process begins with the stage of convective combustion, and the initial velocity of the wave is about 1 km/s. The combustion kinetics known from the literature does not provide the observed rapid development of the process. Various mechanisms of acceleration of the reaction are considered. Results of calculation for a two-phase gas-dynamic model are compared with data of synchrotron diagnostics (set of density profiles in the wave).
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Original Russian Text © A.P. Ershov, A.O. Kashkarov, E.R. Pruuel.
Published in Fizika Goreniya i Vzryva, Vol. 51, No. 6, pp. 85–95, November–December, 2015.
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Ershov, A.P., Kashkarov, A.O. & Pruuel, E.R. Physical mechanisms of high-enthalpy initiation. Combust Explos Shock Waves 51, 700–709 (2015). https://doi.org/10.1134/S0010508215060118
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DOI: https://doi.org/10.1134/S0010508215060118