平头圆柱喷流干扰流场的DSMC/EPSM仿真  

Numerical Study of Jet Interaction Flows of Flat - nosed Cylinder byDSMC/EPSM Approach

作　　者：刘景华[1] 王全利[1] 王振国[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073

出　　处：《岳阳师范学院学报（自然科学版）》2003年第1期6-10,共5页Journal of Yueyang Normal University

基　　金：国家自然科学基金(1990202)

摘　　要：应用DSMC/EPSM混合算法,数值模拟过渡区有逆向喷流干扰的轴对称平头圆柱高超声速流场,分析了流场结构、分离形态及物面气动系数分布等特性。结果表明,随Knudsen数或喷流马赫数的不同,喷流干扰流场存在差异,过渡区中的稀薄气体效应得以体现,同时反映了DSMC/EPSM混合算法是研究稀薄/连续混合区域高超声速流动的有效方法。A hybrid Direct Simulation Monte Carlo/Equilibrium Particle Simulation Method (DSMC/EPSM) approach is applied to provide solutions for jet from flat - nosed cylinder interacting with rarefied external flows in the transitional regime. The flow field and surface properties are analyzed in details. The results show that the interacting flow fields are very different on the varied Knudsen parameter or Mach number of jet , the rarefied gas effects in the transitional regime are verified,and the hybrid DSMC/EPSM method is appropriate for studying the hypersonic flow in the transitional - rarefied regime.

关 键 词：空气动力学 平头圆柱高超声速流场 喷流干扰 DSMC/EPSM混合算法 稀薄气体效应 计算机仿真 

分 类 号：V411.8[航空宇航科学与技术—航空宇航推进理论与工程]