燃气蒸汽式弹射内弹道研究

Research on interior ballistic of gas-steam ejection

燃气-蒸汽式弹射方式以其结构简单、温度适中、压力输出平稳等优点,被越来越广泛地应用到水下运载器的发射系统中,深入研究燃气-蒸汽式弹射装置的内流场对弹射装置的设计、改进具有重要意义。本文通过采用3种不同仿真模型对燃气-蒸汽式弹射内弹道进行计算,结果表明:对流场进行仿真计算时应同时引入汽化模型和组分输运模型,其仿真结果与实际情况更为相符。汽化模型对流场温度的影响比对压力和速度的影响更为明显。研究成果可为燃气-蒸汽式弹射装置的设计与改进提供理论支撑。

Gas-steam ejection with its simple structure, the advantages of moderate temperature and steady pressure output, is widely applied to underwater vehicle emission systems. Study of gas-steam ejection device flow field is of great significance in device design and improvement. By using three different simulation models of gas-steam catapult interior ballistics calculation shows： flow field simulation should be carried out at the same time introducing vaporization model and component transport model, which is more consistent with the actual situation. The influence of temperature on the vaporization model for flow field is more obvious than that of pressure and velocity. The simulation results can be used for gassteam-catapult design and provide theoretical support for device improvement.