高超声速平头圆柱绕流化学反应流场的DSMC/EPSM混合算法研究  

The hypersonic chemical reaction flow of flat-nosed cylinder with hybrid DSMC/EPSM method

作　　者：陈伟芳[1] 杨晓昆[2] 吴明巧[1] 彭威[3] 

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 [2]中国空气动力研究与发展中心,四川绵阳621000 [3]中国人民解放军军械工程学院一系,河北石家庄050003

出　　处：《空气动力学学报》2003年第4期476-481,共6页Acta Aerodynamica Sinica

基　　金：国家自然科学基金资助项目(19902021).

摘　　要：本文发展了平衡粒子模拟方法(EPSM),建立了与高温气体化学反应动力学理论相匹配的EPSM耦合模型,并通过混合参数进行流区的自动识别,将EPSM方法与蒙特卡罗直接模拟方法(DSMC)结合,构造了可模拟化学反应流动的DSMC/EPSM混合算法。应用该算法对汲及化学反应的轴对称情况下高超声速平头圆柱绕流流场进行模拟,将结果与DSMC方法的结果进行比较,验证了新算法对求解化学反应流动的可行性。将混合算法的计算效率与DSMC方法的计算效率进行比较,发现混合算法能够大大提高计算效率。The Equilibrium Particle Simulation method (EPSM) is developed to build a EPSM model suited for chemical reaction flows in high temperature gas. The Monte Carlo method (DSMC) is combined with the EPSM method to make a hybrid DSMC/EPSM method by using a 'hybrid parameter' to divide the different flow regions. The hypersonic gas flow of flat-nosed cylinder is simulated by using hybrid DSMC/EPSM code and the DSMC method. Through the comparison of the results, the effectiveness of the DSMC/EPSM code is proved. The computation efficiency of the hybrid DSMC/EPSM method and the DSMC method is compared. It is proved that the hybrid DSMC/EPSM method is more efficient than the DSMC method.

关 键 词：飞行器 化学反应 平头圆柱 DSMC/EPSM混合算法 稀薄气体流动 平衡粒子模拟方法 

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]