Unsteady Combustion Modeling of Metallized Composite Solid Propellant
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This paper presents a physical-mathematical model of a metallized composite solid propellant (MCSP) unsteady combustion. The approach is based on the heat-transfer equations and oxidizer decomposition equations in the solid phase, the two-phase, the dual-velocity, and the two-temperature model of a reactant flow of the decomposition and gasification products over the propellant surface. The matching conditions on the surface of the fuel are set to provide the mass and the energy conversation laws. The stationary burning rate-pressure dependence for composite solid propellant on basis of ammonium perchlorate obtained during the simulation is in a good agreement with the experimental data described in the scientific researches. The calculation results of the unsteady burning rate depending on the pressure value are presented. The obtained fuel burning rates depending on the value and the rate of pressure drop fairly consistent with the experimental data. The paper provides the values of the pressure drop which leads to the extinction of the solid charge.
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