气相燃气速度对EPDM绝热材料烧蚀的影响

为了解气相燃气速度对EPDM绝热材料烧蚀的影响,在双基推进剂环境中对EPDM绝热材料进行了烧蚀试验研究。试验排除了粒子的作用,分析了两压强下的不同燃气速度环境中EPDM绝热材料的炭化烧蚀率、炭化层的结构特征以及成分分布。试验结果表明:燃气速度对炭化烧蚀率的影响较弱,对炭化层厚度的影响明显;不同燃气速度条件下炭化层断面具有相同的结构特点和相似的成分分布趋势;低燃气速度条件下烧蚀以热解炭化为主,高燃气速度条件下炭化层的机械破坏显著。试验结果可以用于进一步研究EPDM绝热材料烧蚀机理。

Effects of gas-phase speed on EPDM insulator ablation

In order to understand the effects of gas-phase speed on insulator ablation,EPDM insulator ablation experiments were carried out with a test motor,in which double base propellant was used.The particle effect was excluded in the test. The charring ablation rate,the carbon layer structure and the distribution of main ingredient under different gas speed environments are analyzed. The results showed that in the gas environment without particles,the charring ablation rate increased slightly and the gas-mechanic...