多面体网格在推力矢量燃气舵气动特性计算中的应用  

Application of Polyhedral Grid in Numerical Simulations of Jet Vane Thrust Vector Control

作　　者：孙宇航 杨晨[1] Sun Yuhang;Yang Chen(China Airborne Missile Academy,Luoyang 471009,China)

机构地区：[1]中国空空导弹研究院,河南洛阳471009

出　　处：《航空兵器》2018年第4期95-99,共5页Aero Weaponry

摘　　要：为考察多面体网格在燃气舵气动特性计算中的有效性,将多面体网格技术应用于推力矢量燃气舵的流场仿真计算中。计算了由多面体网格建立多个三维模型的气动特性,包括燃气舵单舵在不同舵偏角下的气动特性,以及4片舵片同时存在时的气动特性。将由多面体网格计算得到的气动数据与四面体网格计算得到的气动数据进行对比,结果表明,虽然由四面体网格转换得到的多面体网格对燃气舵周围的激波捕捉能力略逊色于四面体网格,但却能够大幅度减少网格数量,能用更少的网格数量、更少的计算机内存和更短的计算时长得到几近相同精度的计算结果。In order to test and verify the applicability of the polyhedral grids in simulating jet vane aerodynamic characteristics, the polyhedral grids are used to simulate the flow around the jet vanes of rocket motor. Several 3 D jet vane models generated by polyhedral grids are simulated, including the areodynamic characteristics of single vane in various attack angles and the aerodynamic characteristis of four jet vanes existing at the same time. Results from polyhedral grids and tetrahedral grids are compared. It shows that comparing with tetrahedral grids, polyhedral grids that converted from tetrahedral grids not have stronger shock wave capturing capability but it can reduce the number of grid significantly and meanwhile get accuracy simulation resuhs with less time and computer memory.

关 键 词：计算流体力学 火箭发动机 多面体网格 燃气舵 气动特性 仿真 

分 类 号：TJ760.352[兵器科学与技术—武器系统与运用工程]