关键词: 复合推进剂;点火;数值法和计算方案

Abstract: This paper describes the gas-phase ignition model of composite solid propellants ignited by oxygen-contained flow hot gases according to the characteristics of heterogeneous propellants.in order to understand ignition processes in detail,and to indicate the ignition delay accurately,the decomposition processes on the propellant surface during ignition period were inspected by the ignition model,the control equations of the ignition process were calculated directly with the finite-difference scheme,and distributions of temperatures and concentrations at the vicinity of ignition surface were obtained. By comparison with experimental results,it can be concluded that the theoretical model is basically reasonable, and the calculation method is practical and feasible. Obviously,they are of some value to both theoretical research and practical application of gasphase ignition.

Key words: Composite propellant;Ignition;Numerical method and procedure