火箭橇水刹车高速入水冲击数值模拟

Numericalsimulationonrocketsledwater-brake high-speedwater-entryimpact

摘要: 针对目前对火箭橇水刹车高速撞水研究的不足,采用流固耦合方法进行了数值研究,得到了超空泡、水隆起、溅水、水压力等水形态,获得了水刹车的速度、加速度和阻力系数随时间的变化曲线。研究表明: 水刹车刀片和侧板头部形成的超空泡对水阻力影响最大、水隆起影响次之、溅水则基本无影响,水刹车阶梯式入水结构可以有效降低入水冲击力峰值。所采用的方法为火箭橇水刹车设计提供了依据,可为其他相关物体高速入水问题研究提供参考。
- 流体力学 /
- 高速入水 /
- 流固耦合 /
- 火箭橇水刹车
Abstract: Inallusiontolackresearchofrocketsledwater-brakehighspeedenteringintowater,the methodoffluid-solidcouplingwasusedtonumericallyresearch.Themodalitiesofwaterwerecalculatedsuchassupercavitation, uplist,spatterandpressure.Thevelocity,decelerationandresistance coefficientvariedwithtimeofwater-brakeweregained.Numericalresearchshowsasfollows:thesupercavitationgeneratedfrom water-brake'sknifebitandsideboardnoseaffectsthewaterresistance heavily,wateruplistaffectssubordinatelyandwaterspatterultimatelyhasnoeffect;steppedwaterentryconfigurationsofwater- breakcaneffectivelyreducepeakvalueofimpactforce.Thismethodaffordsbasesfordesigningrocketsledwater- brakeandreferencesforstudyingothercorrelativebodies highspeedwater-entry.
- fluidmechanics /
- high-speedwater-entry /
- fluid-solidcoupling /
- rocketsledwater-brake