冲压增程炮弹流场数值仿真与分析  

Numerical simulation and analysis for flow field of ramjet-assisted projectile

作　　者：王筱蓉[1] 姜根柱[1] 周长省[1] 

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《固体火箭技术》2009年第4期400-403,共4页Journal of Solid Rocket Technology

摘　　要：建立了冲压增程炮弹的三维计算模型,采用Navier-Stokes理论对冲压增程炮弹进行三维流场数值仿真,给出并分析了不同攻角下炮弹的流场结构和各部分的阻力系数,并与试验数据进行了对比。结果表明,在非设计状态下的总阻力系数比设计状态下的要大,且随攻角的增加而升高,主要是由炮弹空腔及底部的阻力变化所引起的,仿真结果与试验结果吻合较好,对冲压增程炮弹总体设计具有参考作用。The three-dimensional computation model of solid ramjet rocket assisted projectile was established, and the 3D flow field of projectile was simulated by using Navier-Stokes equations. The flow field structure of projectile and the resistance coefficient of various regions at different angles of attack were analyzed. And also the numerical results were compared with the test data. The results show that the total resistance coefficient under off-design state is higher than that in design state, and it increases with the increase of angle of attack, which is caused by the resistance variation of cavity and bottom of projectile. The simulation results are in well accordance with the test data, and are available for the system design of the ramjet-assisted projectile.

关 键 词：冲压增程炮弹 冲压发动机 数值仿真 攻角 

分 类 号：TJ413[兵器科学与技术—火炮、自动武器与弹药工程] V235.21[航空宇航科学与技术—航空宇航推进理论与工程]