摘要
研究非致命性武器防暴水炮问题,刺激剂破碎雾化后能提升防暴水炮的作战性能。对防暴水炮进行研究能较清晰地看到刺激剂的破碎过程,为有利于进行破碎机理分析,提出采取大涡模拟(LES)和流体体积函数(VOF)相耦合的方法对气液两相流场在Open FOAM平台上进行仿真。仿真结果表明:初始扰动使液体表面产生不稳定波,随着扰动加剧,不稳定波迅速增长,并最终导致了液体的破碎。用不稳定性理论表示液滴的破碎参数,证明KH-RT模型能较好地实现防暴水炮气液两相流的破碎过程。
Broken and atomized irritant can greatly upgrade the performance of anti-riot water cannon. Simulation can show the breakup process clearly and is helpful to breakup mechanism analyze. This article adopts Large Eddy Simulation(LES) combined with Volume of Fraction (VOF) method to numerically simulate the breakup process of the gas-liquid two-phase flow of anti-riot water-cannon based on the open source computation fluid dynamics(CFD) software Open FOAM. The results indicate that initial disturbance will cause unsteady wave on the surface of liq- uid, as the disturbance becomes stronger, the unsteady wave increases immediately, and finally results in the breakup of liquid. The parameters of breakup are calculated by the parameters of waves with unsteady theories. The simulation result indicates that KH-RT breakup model can explain the breakup process of pulsed anti-riot water-cannon.
出处
《计算机仿真》
CSCD
北大核心
2011年第9期25-27,45,共4页
Computer Simulation
关键词
防暴水炮
大涡模拟
不稳定破碎
Anti-riot water-cannon
Lager eddy simulation (LES)
Unsteady breakup