Численное исследование зажигания смесевого топлива горячей частицей при неидеальном тепловом контакте

Abstract

The mathematical model of the solid-phase condensed substance ignition by a metal particle heated to high temperatures in disk-shape was developed under the imperfect thermal contact conditions on the particle - composite propellant border, caused by a natural roughness of a composite propellant surface. The results of numerical research allowed to determine the ranges of energy source initial temperature and parameter characterizing a roughness of composite propellant surface at which radiative transfer in the field of a gas gap between a particle and solid propellant significantly (up to 25 %) influences values of the main integral characteristic of process - an ignition delay time.