脉冲防暴水炮刺激剂二次雾化仿真研究  

Simulation of Secondary Atomization Process of Pulsed Anti-riots Water Cannon

作　　者：袁舟 战仁军[1] 

机构地区：[1]武警工程大学装备工程学院,陕西西安710086

出　　处：《计算机仿真》2013年第10期44-48,共5页Computer Simulation

基　　金：国家自然科学基金(50876113)

摘　　要：关于脉冲防暴刺激剂二次雾化优化控制问题,应研究脉冲防暴水炮刺激剂二次雾化机理。脉冲防爆水炮通过刺激剂雾化后形成的雾幕来达到驱散人群的目的,为达到良好的驱散效果需要对刺激剂雾幕液滴尺寸加以控制。刺激剂液滴的二次雾化过程直接决定了最终雾化液滴的尺寸分布,由于脉冲防暴水炮气液射流范围很大,且小颗粒较多,传统的高速摄像方法难以研究液滴的二次雾化过程。为解决上述问题,提出通过大涡仿真(LES)和流体体积函数(VOF)相耦合的方法对水炮气液两相流场液滴雾化过程进行仿真。仿真结果表明:二次雾化过程中,当液滴从射流本体剥落后,存在多种雾化形式。空气动力对二次破碎影响最明显,液滴之间的碰撞过程中也起到促进作用。利用R-T不稳定理论能较好分析防暴水炮刺激剂二次雾化过程,对脉冲防暴水炮优化设计及雾化特性分析具有实际参考价值。The main purpose of this paper is to study the secondary atomization process of pulsed anti - riots water cannon. In order to upgrade the performance of anti - riot water cannon, the size of the droplets need to be con- trolled, while the anti - riot water cannon disperses crowd by the droplets. The secondary atomization process of the droplets directly determines the final size distribution. Because of the water cannon has a longer jets field and smaller particles, it is difficult to study this process by traditional high - speed imaging method. In order to facilitate the droplet secondary crushing mechanism, we adopted Large Eddy Simulation（LES） combined with Volume of Fraction （VOF） method to numerically simulate the breakup process. The results indicate that there is a variety of atomized forms in the secondary atomization process and the aerodynamic force has a great effect on the secondary process, a collision between the liquid droplets in this process plays a catalytic role. The method of Large eddy simulation （LES） combined with Volume of Fraction（VOF） and the R - T theory can explain the breakup process of pulsed anti -riot water cannon.

关 键 词：脉冲防暴水炮 数学建模 仿真研究 

分 类 号：TV131[水利工程—水力学及河流动力学]