含高速运动弹丸的膛口二次燃烧并行数值模拟  

Numerical Simulation of Secondary Muzzle Flash Including High-speed Projectile Using Parallel Computation Method

作　　者：代淑兰[1] 许厚谦[2] 王兵[3] 

机构地区：[1]中北大学化工与环境学院,太原030051 [2]南京理工大学动力工程学院,南京210094 [3]南京航空航天大学民航学院,南京210016

出　　处：《弹道学报》2009年第1期83-86,共4页Journal of Ballistics

摘　　要：采用多组分ALE方程对含有高速运动弹丸的膛口二次燃烧流场进行了数值模拟.采用网格局部重构的动网格技术处理了动边界引起的网格变化,对流项和化学反应项分别用HLLC格式和基元反应模型进行处理,在多台PC机组成的集群并行系统中,基于域分解的思想对膛口二次燃烧流场进行了数值计算.结果表明,基于网格结构重构的非结构动网格技术能够描述运动弹丸对膛口流场结构和性质的影响,分区并行算法提高了计算速度.The Arbitrary Lagrangian-Eulerian （ALE） equations were applied to the numerical simulation of the secondary muzzle flash including high-speed projectile. By using unstructured dynamic grid based on local re-meshing method, the variation of grid caused by projectile movement was analyzed. The convection term was solved by HLLC method, and the chemical reaction was dealt with by elementary reaction model. Based on MPI parallel environment on PC-Cluster system, a parallel algorithm for the muzzle flow field was discussed. The result shows that, by unstructured dynamic grid technology based on local re-meshing method, the effect of movable projectile on the structure and characteristic of muzzle flow field can be described. The zoned parallel algorithm improves the compute speed.

关 键 词：膛口流场 动网格 基元反应 二次焰 并行计算 

分 类 号：TJ012.2[兵器科学与技术—兵器发射理论与技术]