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.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2009年第4期400-403,共4页
Journal of Solid Rocket Technology
关键词
冲压增程炮弹
冲压发动机
数值仿真
攻角
ramjet-assisted projectile
ramjet engine
numerical simulation
angle of attack
