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

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.