三维复杂流场内能激发松弛的DSMC数值模拟  

Numerical Simulation of Inner Energy Excitation in Three Dimensional Flow Field by Using Monte Carlo Method

作　　者：朱荣丽[1] 曹义华[1] 李栋[1] 

机构地区：[1]北京航空航天大学五系飞机设计研究所,北京100083

出　　处：《力学季刊》2007年第3期412-417,共6页Chinese Quarterly of Mechanics

摘　　要：本文研究了带内能激发松弛和不同来流条件下的复杂外形高超声速飞行器过渡区三维流场特性。采用一种对飞行器物面网格与DSMC计算域网格分别标识的方法,通过判断模拟分子与表面碰撞来完成飞行器物面网格与DSMC计算域网格间的信息传递和信息存贮,对于复杂外形飞行器精确描述的物面网格不需做进一步处理,直接应用于不依赖于飞行器外形的DSMC计算的通用子程序中。采用L-B碰撞模型,分析了内能激发松弛的流场参数特性,从分子碰撞、分子与飞行器表面碰撞的角度,分析了不同来流条件下的流场参数的变化情况。The three dimensional flow field with inner energy excitation and the variable flow conditions were studied with Direct Simulation of Monte Carlo method（DSMC）. A new marking method had been developed which refer to the surface position elements and the space cells in DSMC domain. The transferring and storing of information between the surface position elements and the space cells had been implemented by judging the molecules collision with the surface. The structure of flow field and the aerodynamics along with the inner energy excitation and the variable flow conditions were analyzed in details.

关 键 词：DSMC数值模拟 三维流场 网格标识 分子碰撞 

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]