导流格栅对发射箱内冲击波强度影响仿真

针对发射箱内添加导流格栅导致箱内冲击波强度变化的问题,构建了燃气流与后盖开启过程相互耦合的数值仿真模型,并基于动网格技术进行了仿真计算。研究结果表明:添加导流格栅后,箱内及前盖冲击波强度均有所增加,前盖压强峰值增加约 5%,导流格栅安装位置越靠近发动机喷管,箱内冲击波强度增幅越大。研究结果可为发 射箱内导流格栅设计提供理论参考。

SimulationofEffectofFluidGuidingGridonShockWave IntensityinMissileLaunchContainer

Anumericalsimulationmodelisbuilt tostudytheeffectoffluidguidinggrid ontheintensityofshock waves insidemissilelaunchcontainer,whichiscausedbythecouplingbetweenthegasflowandtheopeningprocessoftherear cover, andsimulationcalculations areconductedusingdynamicmeshtechnology. Theresearchresultindicatesthatadd-ingfluidguidinggridleads toanincreaseintheintensityofshock wavesinsidethemissilelaunchcontainerand onthe frontcover,thepeakpressureonthefrontcoverincreasedbyapproximately5%,andtheclosertheinstallationpositionof fluidguidinggrid totheenginenozzle,thegreatertheamplificationoftheshock waveintensityinsidethemissilelaunch container. The research result can provide theoretical reference for the design of the fluid guiding grid inside missile launchcontainer.