关键词: 火箭发动机绝热层;烧蚀;烧蚀试验;研究

Abstract: A.test motor for screening and evaluating candidate insulation materials was designed and a technique for determining the average ablation rate of internal insulation materials was developed on the basis of many experiments in this paper. In subscale moter tests, material samples are placed inside this motor and internal pressure, velocity and angle of gases scouring are adjusted to approximate the full-scale motor conditions. Factors of insulation ablative rate, combustion gases pressure, gases velocity, angle of gases scouring, bonding seam and typical defects (craze, debonding, blowhole, inclusion), have been studied experimentally. The results are in agreement with measuring results of the full-scale motor.

Key words: Rocket engine insulator;Ablation;Ablation test;Research