锥形发射管脉冲防暴水炮雾化过程的仿真研究

摘要

研究防暴水炮优化雾化效果问题,采用流体力学和空气动力学理论,建立了脉冲水炮外流场数学模型.在VOF和LES模型相结合的基础上,将发射管形状由圆柱形改变为锥形,并利用OpenFOAM软件对近喷口流场进行了数值仿真.通过研究发现锥形发射管在雾化效果和射程上均优于圆柱形发射管,并通过对锥形发射管近喷口流场雾化形态、雾化角、速度云图的仿真、分析,确立了锥度为α=87.74°的发射管较为合理,为脉冲水炮进一步优化提供了借鉴意义.%Based on the theory of fluid mechanics and aerodynamics, we built the model of the flow field of pulse water cannon. Coupling the VOF with LES model, we changed the cylindrical structure of launch pipe into a conical structure and used the OpenFOAM software to simulate the area near the nozzle. Through the research, it was found that the conical launch pipes were better than cylindrical launch pipes on atomization effect and cannon-shot. At the same time, through the simulation and analysis of the area near nozzle of conical launch pipe from the sides of atomization form and angle, distribution of velocity, we established that taper a = 87.74° is more reasonable, which provides a reference for farther optimize of pulsed water cannon.