Numerical Calculation of Opening Process of Frangible Rear Cover of a Launcher

doi:10.3969/j.issn.1000-1093.2018.06.011

Abstract

Abstract: 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. Key

Key words: launchingcontainer, frangiblerearcover, simulation, gasjet, shockwave

CLC Number:

TJ768.2⁺8

DUAN Su-chen， JIANG Yi， NIU Yu-sen， ZHANG Ao-lin. Numerical Calculation of Opening Process of Frangible Rear Cover of a Launcher[J]. Acta Armamentarii, 2018, 39(6): 1117-1124.

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第39卷第6期
2018 年6月兵工学报ACTA
ARMAMENTARIIVol.39No.6Jun.2018

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