Sydorov O. Laminar flame propagation in solid particles-gas suspensions

Present work is devoted to experimental and theoretical studies on determination of the normal flame velocity dependency from the physical and chemical metallic and organic dusts-gas suspension properties. The analytical conductive and conductive-radiation laminar flame model in metal particles - gas suspension is presented. Construction of conductive-irradiative model, as well adapted to the characteristics of coal combustion. Presented model for the first time made possible to explain experimentally observed maximum on the flame velocity dependency from concentration of fuel in the range of concentrations much higher than the stoichiometric for particles that burn in the diffusion mode. Experimental studies of flame propagation in a gas - solid fuel particles suspension in the present study was carried out on the example of aluminum, magnesium, lycopodium and coal powders in a half-open vertical pipes and free spherical small clouds. Presented models showing a good agreement between calculations and the experimental data, both for own and presented in literature data.