高速运动弹丸诱导的瞬态流场数值研究  

Numerical Investigation on the transient flow induced by a high-speed projectile

作　　者：姜孝海[1] 范宝春[1] 李鸿志[1] 

机构地区：[1]南京理工大学瞬态物理国家重点实验室,南京210094

出　　处：《航空动力学报》2008年第9期1579-1584,共6页Journal of Aerospace Power

摘　　要：采用基于任意拉格朗日欧拉(ALE)方程的动网格及嵌入网格法,结合二阶精度Roe格式和沉浸边界法,对弹丸由高压气体驱动从静止状态加速至超声速,射出膛口到完全飞离初始流场的整个过程进行了数值模拟.根据数值结果,详细讨论了初始流场、火药燃气流场的形成与发展以及与弹丸的耦合和相互作用过程.The entire process of the quiescent projectile accelerated by high-pressure gas to shoot out at a supersonic speed and fly out of the range of precursor flow field was simulated numerically. The calculation method was based on arbitrary Lagrangian-Eulerian equations and second-order precision Roe method by adopting the chimera grids, dynamic mesh and immersed boundary method. From the predicted results, the coupling and interaction process among the precursor flow field, propellant gas flow field and the high-speed projectile were discussed in detail.

关 键 词：任意拉格朗日欧拉(ALE)方程 二阶Roe方法 沉浸边界法 膛口流场 动力学过程 

分 类 号：TJ012.2[兵器科学与技术—兵器发射理论与技术]