Abstract:
A mathematical model of ignition of a gas mixture with dust particles is constructed by methods of mechanics of reacting heterogeneous media. Some qualitative feature of the model are studied, which allow one to identify different characteristics variants of thermal dynamics of the mixture: heterogeneous ignition by means of oxidation of coke residue, homogeneous ignition caused by oxidation of volatiles in the gas phase, and hybrid ignition due to simultaneous action of surface and volume reactions. The model is verified using available experimental data on ignition delays of suspended coal particles in air and in oxygen in reflected shock waves.
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