基于多物理场耦合的某型防暴喷射管喷射过程数值模拟  

Numerical Simulation of Jetting Process of a New Type Anti-Riot Ejector Based on Multiphysics Coupling Method

作　　者：赵法栋[1] 张燕丽 庄弘炜[1] ZHAO Fadong;ZHANG Yanli;ZHUANG Hongwei(Equipment Management and Support College,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：《兵器装备工程学报》2020年第8期58-62,111,共6页Journal of Ordnance Equipment Engineering

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项目(KYTD201905)。

摘　　要：采用多物理场耦合的方法,对某型防暴喷射管射流高压气体膨胀、活塞推动以及射流喷射3个物理过程分别建立数值模型,基于Comsol Multiphysics平台进行耦合计算。结果表明:在初始压力为10 MPa的条件下,活塞在0.31 ms内速度达到最大值8.81 m/s,在18.47 m/s运动到喷嘴处,速度约为2.02 m/s;在活塞推动下管内战剂压力以弹性波的形式向喷嘴传播,其最大值约9.12 MPa;战剂在喷嘴处加速,经过长圆柱段的整形加速从喷口喷出,最大出口速度为70 m/s;管外射流可分为伞状结构阶段、水团形成并破碎阶段和射流继续发展阶段,空气摩擦阻力是射流破碎的主要因素。所建立的数值模型能为下一步火药选型、喷射管和喷嘴结构优化等提供借鉴。To analyze the formation and development of a new type anti-riot ejector,numerical models were established separately to simulate the high-pressure gas expansion process,the piston propulsion process and the jet injection process,the multiphysics coupling method and the coupling calculation were carried out based on Comsol Multiphysics platform.The results show that when the initial pressure is 10 MPa,the maximum velocity of piston is 8.81 m/s in 0.31 ms and 2.02 m/s in 18.47 ms while the piston arrives at the nozzle.The pressure of internal warfare agent propagates to the nozzle in the form of elastic wave under the piston driving,which the maximum is about 9.12 MPa.The warfare agent accelerates at the nozzle and ejects from the nozzle after shaping and accelerating by the long cylinder section,and the maximum exit velocity is about 70 m/s.The jet can be divided into three stages:umbrella structure stage,water mass formation and breakup stage and jet continuing development stage.Air friction resistance is the main factor of jet breakup.The numerical model can provide a basis and reference for the selection of propellant,the optimization of the pipe and the nozzle.

关 键 词：防暴喷射管 喷射过程 数值模拟 脉冲射流 多物理场耦合 

分 类 号：TJ99[兵器科学与技术—武器系统与运用工程]