轴向脉冲电流对铜射流的箍缩不稳定性作用分析  

Analysis of effect of axial pulse current on pinch instability of copper jets

作　　者：齐文达 孔庆奕 向红军 容烨 QI Wen-da;KONG Qing-yi;XIANG Hong-jun;RONG Ye(Department of Rail Transit,Hebei Jiaotong Vocational and Technical College,Shijiazhuang 050035,China;State Key Laboratory of Electromagnetic Environment Effect,Army Engineering University,Shijiazhuang 050003,China;Department of Ammunition Engineering,Army Engineering University,Shijiazhuang 050003,China)

机构地区：[1]河北交通职业技术学院轨道交通系,河北石家庄050035 [2]电磁环境效应国家级重点实验室,陆军工程大学,河北石家庄050003 [3]陆军工程大学弹药工程系,河北石家庄050003

出　　处：《电工电能新技术》2020年第1期36-42,共7页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51307182);中国博士后基金项目(2018M633754)

摘　　要：为了提高被动电磁装甲对破甲弹产生的聚能铜射流的防护能力,考虑到聚能铜射流在自由拉伸过程中出现的颈缩现象以及脉冲电流在铜射流上产生的趋肤效应,本文利用叠加原理和磁流体不稳定性理论,建立了铜射流在全塑性态和液态下的线性扰动控制方程,得到了聚能铜射流在轴向脉冲电流作用下的箍缩不稳定性随粘性或屈服极限、波数和时间的变化规律,并证实了两种研究方法的可行性。最后利用直径39.2mm破甲弹进行静破甲定性试验,通过后效板射流入射孔的大小验证了脉冲电流对铜射流的箍缩作用。To improve the protective capability of passive electromagnetic armor against shaped charge copper jets produced by armor-piercing projectiles,considering the necking phenomenon of shaped charge copper jets during free stretching and the skin effect of impulse current on copper jets,the linear perturbation control equations of jet on full plasticity state and liquid state are established by using superposition principle and magnetohydrodynamic instability theory.The dependence of pinch instability of shaped charge copper jet on viscous or yield limit,wave number and time is obtained and the feasibility of the two methods is verified.Finally,the qualitative test of static armor-breaking is carried out by 39.2mm diameter armor-breaking projectile,and the size of the incoming perforation confirms the pinch effect of the pulse current on the jet.

关 键 词：被动电磁装甲 聚能铜射流 箍缩 磁流体不稳定性 

分 类 号：TJ99[兵器科学与技术—武器系统与运用工程]