过渡区球锥气动力特性的桥函数估算与DSMC仿真研究  

Research on Aerodynamic Characteristics of the Sphere-cone Figure in Transitional Fegion by Bridging-Function and DSMC Method

作　　者：吴雄[1] 陈伟芳[1] 石于中[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：《航空计算技术》2002年第4期4-8,共5页Aeronautical Computing Technique

基　　金：国家自然科学基金资助项目(19902021)

摘　　要：采用DSMC(DirectSimulationMonte-Carlo)方法模拟球锥体过渡区流动。论文给出了不同Knudsen数球锥绕流流场的温度与压力分布图,以及在不同Knudsen数、不同马赫数条件下球锥阻力系数和底部阻力系数的分布,并将阻力系数模拟结果与桥函数一体化估算结果进行了比较分析。In the paper,the transitional flow over a spherecone figure is simulated by DSMC method.The isotherm and pressure contour are shown and the drag coefficient and the afterbody drag coefficient distribution are also presented at different Knudsen numbers and different Mach numbers. Comparison analysis of the drag coefficient is carried out at last between simulated results and approximation data estimated by the bridgingfunction formula.

关 键 词：DSMC方法 桥函数 过渡区流动 

分 类 号：O224[理学—运筹学与控制论]