固体火箭发动机绝热层缺陷对药柱燃面影响的数值模拟

NUMERICAL SIMULATION OF EFFECT OF SOLID ROCKET MOTOR INSULATION DEFECT ON GRAIN BURNING

发动机绝热层人工脱粘层局部产生缺陷时，使药柱燃面曲线偏离设计曲线，导致发动机内弹道性能也偏离设计值。为了模拟这种缺陷对药柱燃面的影响，扩展了原通用坐标程序的计算范围，并又新增加了一些基本图形的算法。改进后的算法可适用于绝热层有或没有缺陷的药柱燃面计算。针对绝热层缺陷建立了三种燃烧模型，计算分析了缺陷类型、结构与位置尺寸对药柱燃面的影响，为分析绝热层有缺陷的发动机性能提供了基础。

When there is defect in the stress release boot of motor insulation,the burning surface profile will deviate from the design,and so does the internal ballistic property The range of original general coordinate program was expanded and the calculation methods of new geometric figures were added in order to simulate the insulation defect on the burning surface The improved general coordinate program can be used to calculate the burning surface with or without insulation defect According to the defects,we build up and calculate three burning models of insulation defects,and analyze the effect of model catalog,structure and position dimension on the burning surface,which provids the basis for the property analysis of motor with insulation defect