一种基于结构化贴体网格的DSMC方法研究

基于DSMC方法,发展了一种结构化的贴体网格的分子运动轨迹跟踪和定位的方法———网格面法向量判断法。在此基础上建立了一套DSMC数值模拟程序,对球双锥和Apollo飞船在过渡区域流动进行了数值模拟,并分析了其过渡区域超音速、高超音速的气动力、气动热等问题。通过将本文的计算结果与参考文献的计算结果和实验结果进行了比较,验证了所发展的方法的可靠性。

A Direct Simulation Monte Carlo (DSMC) Method Based on Structured Body-fitted Grids

Based on the direct simulation Monte Carlo (DSMC) method, the molecules' tracing and locating method of structured body-fitted grids, which is called grid face vertical vector tracing method, is developed. Using this method, the DSMC program is developed to simulate flows in transitional region around a sphere double cone and Apollo capsule, and the aerodynamic and thermal characteristics around the supersonic and hypersonic vehicles is investigated. By comparing the present results with the reference results and experimental data, it is proved that the method developed in this paper is reliable.