脉冲防暴水炮拉瓦尔型喷嘴雾化过程仿真研究

摘要

In this paper,we study the anti-riots water cannon optimal control problem.The high-pressure gas is as the driving force of anti-riots water cannon.Jet nozzle is the emission element of anti-riots water cannon.The laval nozzle are designed according to the jet structure of the police pulsed anti-riots water cannon.Coupling the VOF with LES model,we build the mathematic model and physical model of the nozzle,and use the OpenFOAM software to emulation the area near the nozzle.Through the research it was found that the laval nozzle can achieve good result on atomization effect and cannon-shot.At the same time,through the simulation and analysis of the area near laval nozzle from the sides of atomization form and angle,distribution of velocity.We established that field angle between 15° and 18° is more reasonable,as providing a reference for farther optimize of pulsed water cannon.%研究防暴水炮优化控制问题.防暴水炮以高压气体作为动力,喷嘴作为射流发射元件.根据警用脉冲防爆水炮的射流特点,设计了拉瓦尔型喷嘴.在VOF和LES模型相结合的基础上,建立了喷嘴的数学模型和物理模型,并采用OpenFOAM软件对近喷口流场进行了数值仿真.通过研究发现拉瓦尔型喷嘴在雾化效果和射程上都能达到很好的效果,并通过对拉瓦尔型喷嘴近喷口流场雾化形态、雾化角、速度云图的模拟、分析,确立了张角为15°和18°之间的喷嘴较为合理,为脉冲水炮的进一步优化提供了借鉴依据.