导流格栅对发射箱内流场环境影响研究

Reasearch on influence of diversion grille structure on flow field environment in a launch canister

为研究导流格栅结构对发射箱内部燃气流场的影响,以某型导弹发射箱内流场为研究对象,对后盖在燃气作用下的裂片打开及前盖胀破过程进行研究,并对不同导流格栅结构下的流场仿真结果进行分析和试验验证。结果表明导流格栅结构能够提高压力波向前盖方向传播的速度,有效缩短前盖的开盖时间;增设导流盘来改变格栅结构在一定程度上能够对前后盖开启产生影响,相对于无导流盘,前盖开启时刻的提前幅度为14%。研究结果对发射箱前后盖的碎裂开盖方案优化具有一定的指导意义和工程实用价值。

In order to study the influence of the diversion grille structure on the gas flow field inside the launch canister,taking the flow field in a certain type of missile launcher as the reasearch object,the opening process of lobes of fragile back cover and bursting process of fragile front cover under gas effect and the flow field simulation under different diversion grille structures were researched and analyzed this paper.The results show that the diversion grille structure can increase the propagation speed of the pressure wave in the direction of the front cover,and effectively shorten the opening time of the fragile front cover.The addition of a diversion plate to change guide grid structures can affect opening of front and back cover to a certain extent,compared with no deflector,the advance of the opening time of the front cover is 14%.The study results have certain guiding significance and engineering application value for the optimization of opening the launcher cover with fragmentation.