饱含液体的单胞结构对射流的干扰特性分析  

Analysis of liquid-filled unit cell structure subjected to shaped charge jet impact

作　　者：张弦 祖旭东[1] 黄正祥[1] 肖强强[1] 贾鑫[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《爆炸与冲击》2017年第6期1101-1106,共6页Explosion and Shock Waves

基　　金：国家自然科学基金项目(11402122)

摘　　要：基于虚拟原点理论、冲击波反射理论和射流干扰理论,考虑液体的喷散特性和径向汇聚特性,改进并完善了射流侵彻饱含液体的单胞结构的理论模型,得到了精确的射流受干扰速度区间的表达式、液体喷散速度的表达式和液体喷散流量的表达式。通过对比理论和试验得到的射流受干扰的速度区间,证明了本文理论模型的可靠性。研究结果表明:液体的喷散和径向汇聚都会影响射流的稳定性,使射流出现颈缩和提前断裂,降低射流的剩余头部速度从而降低射流的剩余侵彻能力。Based on the virtual origin theory,the shock wave reflection theory and the jet interference theory,the theoretical model for the jet penetrating a liquid-filled unit cell structure was improved and perfected in consideration of the liquid’s spray and radial convergence. The exact expression of the disturbance velocity range of the jet,the expression of the liquid’s spray velocity and the expression of the liquid’s flow were derived. The theoretical mode of this paper was confirmed by in the comparison of the theoretical and the experimental results of the disturbance velocity range of the jet. The results showed that the liquid’s spray and radial convergence exert influence on the shaped charge jet’s stability,leading to the jet’s necking and fracture,thereby reducing the jet’s residual velocity and residual penetration ability.

关 键 词：聚能射流 单胞结构 干扰区间 射流稳定性 

分 类 号：O358[理学—流体力学]