二阶迎风TVD数值格式在非平衡高超声速钝体绕流中的应用  

APPLICATIONS OF A SECOND-ORDER UPWIND TVD SCHEME TO NONEQUILIBRIUM HYPERSONIC FLOWS AROUND BLUNT-BODY

作　　者：胡光初[1] 乐嘉陵[1] 曹文祥[1] 

机构地区：[1]中国空气动力研究与发展中心

出　　处：《力学学报》1994年第2期139-148,共10页Chinese Journal of Theoretical and Applied Mechanics

摘　　要：将Ｈ．Ｃ．Ｙｅｅ所发展的一种二阶迎风ＴＶＤ格式运用于半球的高超声速化学非平衡黏性绕流的数值计算，详细介绍了流体力学方程组和化学组元守恒方程组全耦合求解的过程，以前这一研究领域中仅仅运用一阶格式及松散耦合的方法。化学松弛气体考虑了七组元（Ｏ，Ｏ＿２，ＮＯ，Ｎ，ＮＯ￣（＋），Ｎ＿２，ｅ￣（－））和主要的七反应，在驻点线上的计算结果与前人结果比较表明，本文有较大改进。An explicit second-order upwind TVD scheme by H.C.Yee is first suc-cessfully extended to solve the viscous,diffussive,nonequilibrium,ionizing,hypersonic flowfields over a hemi-sphere.The governing gas-dynamic and species-continuity equations forlaminar flow are presented.The gas-dynamics/species continuity equations fully couplingprocedure is described in detail.Before this only the firstorder scheme and loosely coupledmethod was successfully used in this research field.The gais model for chemically relaxingair consists of seven species(O,O_2,NO,N,NO￣(+),N_2,e￣(-))and seven substantial reactionsare considered.The calculated results are compared with existing numerical solutions solvedby first-order scheme in the literature along the stagnation line of the hemisphere,improvedresuIts are obatined.

关 键 词：迎风 TVD 高超音速 飞行器 

分 类 号：V211.18[航空宇航科学与技术—航空宇航推进理论与工程]