Combustion Modeling of Composite Metallized Solid Fuel in View of Gas-Dynamic Effects

This paper presents a physical and mathematical combustion model of the composite metallized solid fuel (CMSF) and the results of the numerical investigation using the developed model. We have used the heat equation in the condensed phase and the oxidation half-reaction equation to describe the physical and chemical processes in the solid phase. Processes in the gas phase are described using the R. I. Nigmatulin's approach of the multiphase reacting media dynamics. The conservation conditions of the mass and energy fluxes of the components are set on the surface of the solid fuel. The result of our parametric numerical investigation is the dependence of the CMSF burning rate on pressure for various aluminum particle sizes. The obtained dependences of the burning rate coincide with the experimental ones with satisfactory accuracy.