重叠网格方法研究多子弹抛撒气动问题  

Investigation of cluster bomb projection aerodynamic problem using overset grid method

作　　者：张海瑞[1,2] 袁武[2] 范晶晶[2] 张为华 

机构地区：[1]国防科技大学航天科学与工程学院,湖南长沙410073 [2]中国运载火箭技术研究院,北京100076

出　　处：《国防科技大学学报》2014年第5期15-20,共6页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(60903206)

摘　　要：子母弹抛撒气动问题是一类典型的有相对运动的多体气动问题,也是重叠网格方法最有价值的应用领域之一。采用MI-Grid重叠网格软件系统,耦合流动力学方程和动力学/运动学方程,研究子弹分离过程的气动性能和运动轨迹,并结合正交试验设计,讨论和评估了出舱条件及气动干扰对子弹分离运动的影响,指出子弹在抛撒流场中受激波干扰对姿态运动影响很大,单子弹抛撒时母弹激波扫射使子弹俯仰特性剧烈波动,多子弹抛撒时弹舱流动受子弹挤压反射激波使子弹姿态抬头。Cluster bomb projection is a typical multi-body aerodynamic problem with relative motions,and is also a valuable application area for the overset grid method.The MI-GRID overset software,the fluid dynamic governing equation and the rigid body movement equations were employed to investigate the aerodynamic trajectory and movement characteristics in bomb separation process.The orthogonal experimental design was also employed to discuss even to assess the effect of the initial and aerodynamic interference on bomb separation movement.Results indicate that the bomb in projection flow field is greatly affected gesture motions by the shock interference.When a singular bomb is projected,the shock of the missile makes the pitching movement of the bomb vary abruptly.While the multiple bombs are projected,the reflection shock that is extracted by the bomb makes the bomb rise,which can affect the bomb bay＆#39;s flowing.

关 键 词：子母弹 多体气动问题 重叠网格 计算流体力学 

分 类 号：V211.3[航空宇航科学与技术—航空宇航推进理论与工程]