气体炮内膛不同喷管对初速影响的探究

Research on the influence of different nozzle types to the initial velocity of gas guns

研究了喷管马赫数对弹丸初速的影响。根据流体力学的相关理论,建立气体炮优化方案结构及数值模拟模型,分别对喷管的收缩型面、喉部型面和扩张段型面进行设计,计算出不同马赫数喷管的气体炮优化方案的弹丸初速,并使用CFD软件进行仿真实验验证。仿真结果表明:弹丸初速随着马赫数的增加而增大,当弹丸初速达到最大值之后,随着马赫数的增加弹丸初速减小。该研究可为气体炮内膛结构喷管优化提供一定的参考。

The effect of nozzle Mach number on the initial velocity of the projectile is studied. According to the relevant theories of fluid mechanics, the gas gun optimization scheme structure and numerical simulation model are established. The shrinkage profile, throat profile and expansion section of the nozzle are designed respectively, and the gas cannon optimization of different Mach nozzles is calculated. The project's initial velocity of the projectile is verified in CFD software. The simulation results show that the initial velocity of the projectile increases with the increase of Mach number. When the initial velocity of the projectile reaches its maximum, the initial velocity of the projectile decreases with the increase of Mach number. This study can provide some reference for the optimization of the gas nozzle inner structure nozzle.