低压环境下膛口冲击波实验研究

为了解低压环境下膛口冲击波的传播特性，进行了低压环境下膛口冲击波的压力测试实验。通过低压舱配合抽真空装置实现低压环境，设计膛口冲击波压力测试系统，测得海拔12 km内7个高度对应压力下膛外多点处的压力曲线。实验结果表明：低压环境下冲击波场在膛口的分布规律与常压环境下一致；膛口冲击波强度随环境压力的降低近似呈线性减小，10 km高空的膛口冲击波强度仅为地面膛口冲击波强度的一半。研究结果对高空环境下膛口流场控制具有参考意义。

Research on Muzzle Shock Wave in Low Pressure Environment

A pressure test of muzzle shock wave is carried out to understand the propagation of muzzle shock wave in low pressure environment. Low pressure environment is established in a cabin through vacuum pumping system. Pressure curves of muzzle shock wave at different pressures are got by the pressure test system. The results show that the distribution of muzzle shock wave in low pressure environment is the same as that in atmospheric environment. With the decrease in the ambient pressure, the intensity of shock wave decreases linearly. The intensity of shock wave at 10 km altitude is roughly half of that in ground. These results lay the foundation for the research on muzzle flow field and its control technology of aircraft gun in real high altitude environment.