Numerical Simulation of Combustion of Aluminized Solid Fuel under Pressure Fluctuations
A. Yu. Krainov, A. A. Mitrofanov, K. M. Moiseeva
National Research Tomsk State University, Tomsk, Russia
Keywords: metallized solid propellant, combustion, two-phase flow, pressure oscillations, combustion rate oscillations, mathematical modeling
Abstract
Using a coupled combustion model of a metallized composite solid propellant, this study examines transient fuel combustion under harmonic pressure variations above the fuel surface. The combustion model takes into account chemical reactions in the condensed and gas phases. Above the fuel surface, convection and diffusion of gas mixture components, two-phase flow, velocity and thermal nonequilibrium of the phases, and combustion of aluminum particles are considered. Boundary conditions for equal mass and energy fluxes are imposed on the fuel surface. The results of a computational and theoretical study of the dependence of the fuel combustion rate on the amplitude and frequency of pressure oscillations are presented. The study was conducted for two reaction orders in the gas phase. The influence of pressure oscillation frequency on the amplitude of fuel combustion rate variations is determined.
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