关键词: 固体推进剂火箭发动机;推进剂药柱;绝热层;缺陷;药柱燃面;数值仿真

Abstract: 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

Key words: Solid propellant rocket engine;Propellant grain;Heat insolation layer;Defect;Burning surface of grain +;Numerical simulation