Modeling of flame propagation in a mixture of combustible gases and particles

A physicomathematical model of flame propagation over a gas suspension comp osed of a mixture of gases (oxidizing, combustible, and inert components) a nd the particles of a condensed material that reacts heterogeneously with t he oxidizing component is formulated. Numerical simulations are used to obt ain a dependence of the flame velocity on the parameters related to the mas s concentration of the particles, the particle size, the activation energy of a heterogeneous reaction on the particle surface, the heat of the hetero geneous reaction, and the mass exchange of the particles. Depending on the ratio of the dispersed-phase parameters, the flame velocity in this medium can increase severalfold in comparison with the flame velocity in a dust-fr ee gas mixture or decrease. In the latter case, the effect of the particles is similar to the effect of the inert dispersed phase.