Nonlinear Intrinsic Instability of Solid Propellant Combustion Including Gas-Phase Thermal Inertia

摘要

The problem of homogeneous solid propellant combustion instability is studied with a one-dimen- sional flame model, including the effects of gas-phase thermal inertia and nonlinearity. Computa- tional results presented in this paper show nonlinear instabilities inherent in the equations, due to which periodic burning is found even under steady ambient conditions such as pressure. The stability boundary is obtained in terms of Denison-Baum parameters. It is found that inclusion of gas-phase thermal inertia stabilizes the combustion. Also, the effect of a distributed heat release in the gas phase, compared to the flame sheet model, is to destabilize the burning.