底凹弹绕流流场波谱规律数值分析  

Numerical Analysis of Flow Field Characteristic in Hollow Base Projectile

作　　者：鞠玉涛[1] 周长省[1] 李坚[1] 

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《弹箭与制导学报》2003年第S4期144-146,共3页Journal of Projectiles,Rockets,Missiles and Guidance

摘　　要：数值模拟的控制方程为雷诺平均的可压缩纳维尔—斯托克斯(Navier—Stokes)方程,湍流模型采用k—ε两方程模型,数值格式为二阶迎风格式。数值模拟了标准与底凹弹形的绕流流场,得到了流场的宏观结构及底部涡流结构的变化规律,分析了两种弹形绕流波谱的变化规律,为底凹弹减阻机理研究提供帮助。The governing equations are the Reynolels-averaged Navier-Stokes equations,k-εmodel is adopted for turbulence flow.The numerical scheme is second order windward scheme.The characteristics of flow field in hollow base projectile and projectile are simulated by a numerical method,and the flow macrostructures and their development agreeing well with the available shadow photos.The flow characteristics are analyzed and a predictive method for such now problems is presented.

关 键 词：弹丸流动 流场 数值模拟 

分 类 号：TJ413.5[兵器科学与技术—火炮、自动武器与弹药工程]