摘要
采用二维非定常气流场模型和VOF(Volume of Fluids)模型,对水下固体火箭发动机点火初期这一非稳态过程进行了气水耦合数值求解。模拟了燃气泡的形成、发展及断裂过程,揭示了燃气泡中压强、马赫数等参数的变化规律,得到了高速射流点火初期的流场变化特征,模拟中捕捉到了喷管出口处的压力脉动和燃气泡的"颈缩"现象,并对引起压力脉动的相关因素进行了讨论。模拟结果表明,燃气泡的发展变化过程会对喷管扩张段产生影响,这是水下高速射流的重要特征之一。上述研究可为水下发射固体火箭发动机设计提供参考。
The two-dimension model and the volume of fluid model were combined to solve the process of time-dependent ignition of underwater SRM. The formation, developing and fracture process of the exhausted-gas-bubble were simulated. The results show some regular variation of the parameters such as pressure and Mach number in the exhausted-gas-bubble. The phenomenon of pressure fluctuations and necking of exhausted-gas-bubble are captured. And the factors which caused pressure fluctuations were discussed. The numerical results show that the changes of exhausted-gas-bubble have an impact on the expansion section of nozzle and this is one of important features of high-speed jet underwater. The analysis of the calculated results can provide information for design of underwater SRM.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2009年第5期486-491,共6页
Journal of Solid Rocket Technology
