基于动态嵌套网格技术的机载武器投放研究  

Research on Release of Airborne Weapon Based on Dynamic Chimera Grid Technique

作　　者：许晓平[1] 周洲[1] 范锐军[1] 王军利[1] 

机构地区：[1]西北工业大学无人机特种技术国防科技重点实验室,陕西西安710072

出　　处：《兵工学报》2010年第9期1241-1246,共6页Acta Armamentarii

基　　金：预研基金资助项目(513250101)

摘　　要：为研究机载武器投放过程中机、弹气动干扰特性及航弹运动规律,采用计算流体力学(CFD)方法对机载武器投放过程进行数值模拟。结合刚体六自由度运动方程,通过动态嵌套网格技术模拟航弹运动,在求解非定常Euler方程时引入广义极小残余方法(GMRES),成功模拟了基于察/打一体无人机平台的航弹自由投放过程,获得了详细的包括弹体运动速度、空间轨迹和受力情况等在内的丰富的运动信息。通过算例,验证了本文发展方法的有效性和合理性。计算结果表明:投放过程中,载机气动力受航弹影响较小,而航弹受载机气动干扰影响较大;航弹所受的气动干扰主要来自投放初期,随着弹体的下落和距载机距离的增加,气动干扰影响逐渐渐弱。In order to study the aerodynamic interference and movement rules of external stores,computational fluid dynamics（CFD）methods were used to simulate the release process of airborne weapons in R/S UAV.Combined with 6-DOF kinetic equations,the dynamic chimera grid approach was used to realize the bomb＇s movement simulation,and the generalized minimal residual method（GMRES）was introduced to solve unsteady Euler equations.All major parameters,such as displacement,angular orientations and forces,and their change trends were obtained.The results show that the effect of aerodynamic interference caused by release is only significant at its beginning,and almost negligible with the increase of the distance between the aircraft and the external stores.

关 键 词：流体力学 数值模拟 外挂物投放 动态嵌套网格 广义极小残余法 气动干扰 

分 类 号：V211[航空宇航科学与技术—航空宇航推进理论与工程]