喷嘴结构对某防暴喷射管内流场影响的数值模拟  

Numerical Simulation of the Effect of Nozzle Structure on Internal Flow Field in an Anti-riot Pipe

作　　者：赵法栋[1] 张燕丽 庄弘炜[1] 吴一丹 ZHAO Fadong;ZHANG Yanli;ZHUANG Hongwei;WU Yidan(College of Equipment Management and Support,Engineering University of PAP,Xi’an 710086,China;Base Department,Engineering University of PAP,Xi’an 710086,China)

机构地区：[1]武警工程大学装备管理与保障学院,西安710086 [2]武警工程大学基础部,西安710086

出　　处：《弹箭与制导学报》2021年第1期8-12,共5页Journal of Projectiles,Rockets,Missiles and Guidance

基　　金：武警部队装备研发项目(WK2017-09);武警工程大学创新团队科学基金(KYTD201905)资助。

摘　　要：为深入分析喷嘴结构对某防暴喷射管内流场的影响,采用动网格技术对其冲击挤压过程进行了大涡模拟。结果表明:管内流动能量损失主要是由喷嘴结构突变和压强差引起的涡流损失;锥直形喷嘴收缩角越小,涡流损失越小,出口平均速度越快,能量利用率越高;在喷嘴总长度和入口收缩段长度不变的条件下,等变速喷嘴能量损耗最低,速度和压强分布最均匀、出口平均速度最高,性能最优。所得结论对喷嘴结构优化具有一定的指导意义。To analyze the influence of nozzle structure on internal flow field in a anti-riot pipe,the large eddy simulation of the percussion flow process is carried out by using moving grid technology.The results show that the energy loss is mainly caused by the change of nozzle structure and the pressure difference.The smaller the contraction anglecontraction angles of the cone straight nozzle,the smaller the eddy loss,the faster the average outlet velocity,the higher the energy utilization ratio.Under the condition that the total length of the nozzle and the length of the inlet contraction section remain the same,the energy loss of the equalspeed change nozzle is the lowest,its velocity and pressure distribution is the most uniform and the outlet average velocity is the highest,and the performance is the best.The conclusion could provide guidance for nozzle structure optimization.

关 键 词：防暴喷射管 挤压式流动 脉冲射流 喷嘴结构 

分 类 号：TJ5[兵器科学与技术—军事化学与烟火技术] TJ99