高压水射流冲击HTPB推进剂的安全性分析

以高压水射流冲击HTPB推进剂的动态加载过程和准静态加载过程在作用压力和持续时间上的巨大差异为基础, 在水锤压力和滞止压力计算的基础上分别进行了点火模式预判, 然后以模型类比和实验方法分析了动态和准静态加载过程的安全性。结果表明, 使用出口压力在300 MPa以内的高压水射流冲击HTPB推进剂装药在动态加载过程中不会有点火起爆危险性, 但使用100M Pa以上的高压水射流冲击HTPB推进剂装药在准静态加载过程中其内部可能会发生温度突跃情况, 这可能会引起热点火、甚至热起爆。

Safety analysis of high-pressure waterjet impacting HTPB propellant

Due to the huge differences in pressure and duration of dynamic loading process and quasistatic loading process in high-pressure water jet impacting HTPB propellant, possible ignition modes were prejudged on the basis of the calculation of water hammer pressure and stagnation pressure, and the safety of dynamic loading process and quasi-static loading process were analyzed through model analogy and experimental study respectively.The results show that there is no detonation risk in the dynamic loading process of high pressure water jet with the outlet pressure less than 300 MPa, but in the quasi-static loading process of high pressure water jet the outlet pressure of which is above 100 MPa.It is possible that internal temperature has a sudden rise, which may cause thermal ignition or even thermal explosion.