发射箱易碎后盖开启过程的数值计算

The opening process of rear cover of a launcher involves complex physical phenomena, such as shock wave propagation and jet motion. The dynamic mesh technology is used to get the pressure and temperature distribution of gas jet flow in the process of opening the cover by taking a solid rocket engine as the research object.The opening process of fragile cover is studied, and the gas jet flow is analyzed. The results show that the peak overpressure of shock wave is higher in a radial jet of engine, which may damage the launcher and peripheral equipment; the movement of frangible rear cover has an influence on the gas jet flow. It is shown that the gas jet flows downward with the downward movement of rear cover, and the rear fow of gas jet occurs due to the blocking of rear cover; the shock effect of gas flow decreases gradually in the process of its motion, and the temperature and pressure on the rear cover also decrease gradually except the core area. The simulated results are consistent with the test results.