负氧平衡发射药膛口燃烧流场的数值模拟  

Numerical Simulation of Muzzle Combustion Flow Field for Propellant with Negative Oxygen Balance

作　　者：代淑兰[1] 贺增弟[1] 肖忠良[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《火炸药学报》2011年第3期69-71,共3页Chinese Journal of Explosives & Propellants

基　　金：火炸药青年基金资助

摘　　要：采用多组分ALE(Arbitrary Lagrangian-Eulerian)方程组对含有高速运动弹丸的负氧平衡发射药膛口射流燃烧流场进行了数值模拟。分别用HLLC格式和基元反应模型处理对流项和化学反应项,用网格局部重构的动网格技术处理因弹丸大位移动边界造成的网格变形,并基于非结构动网格和分区算法开发了并行程序,对膛口高度欠膨胀射流燃烧流场形成和发展的影响进行了数值计算。计算结果表明,可燃成分浓度和发射药燃气出膛口压力对二次焰的形成和发展具有重要影响,该模拟计算既能高精度分辨膛口复杂激波结构又能有效模拟发射药燃气的二次燃烧。The arbitrary Lagrangian-Eulerian equations are applied to study the numerical simulation of the chemical non-equilibrium muzzle flow fields with movable pill.The convection term is solved with HLLC method and the chemical reaction is dealt with an elementary reaction model.By using unstructured dynamic grid based on local remeshing method,the variation of grid caused by projectile movement was analyzed.A parallel arithmetic based on dynamic unstructured grid and multiply-connected domain for the jet combustion of muzzle flow field is discussed.The results indicated that the species fractions and pressure of propellant combustion gas had important influence on secondary muzzle flash onset and spread.Based on the calculations,the complex structure of shock wave and secondary muzzle flash can be simulated.

关 键 词：物理化学 发射药 动网格 基元反应 负氧平衡 二次燃烧 并行计算 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] TQ562[化学工程—炸药化工]