非平衡化学反应流场NS方程计算研究  

NAVIER STOKES COMPUTATION OF NONEQUILIBRIUM CHEMICALLY REACTING FLOWFIELDS

作　　者：欧阳水吾[1] 谢中强[1] 

机构地区：[1]北京空气动力研究所

出　　处：《计算物理》1997年第1期6-12,共7页Chinese Journal of Computational Physics

基　　金：国防预研基金

摘　　要：介绍一种新的与化学问题相耦合的ＮＳ方程数值方法，用来计算有限速率化学反应再入流场采用迎风ＴＶＤ差分格式的激波捕捉法，求解控制方程。本项研究针对轴对称流动。然而，可以直接推广到三维流动和其它的化学反应系统。所采用的整个泰氟隆空气化学反应模型是由２３个化学组元和３５个化学反应所组成。对钝头球锥体全流场（包括前体和近尾迹）进行了数值模拟，获得了充分收敛的数值解。A new coupled chemistry NS numerical method is proposed for predicting finite rate chemically reacting re entry flowfields. The governing equations are solved using the upwind TVD shock capturing scheme. For simplicity, the present study focuses on axisymmetric flows;however, subsequent extensions to three dimensional flows and /or other chemical systems are also relatively straightforward. The overall Teflon air chemical reaction model used consists of 23 species and 35 gas phase reactions.The numerical simulations are made for the complete flowfield (fore body and near wake) over blunt sphere cone. The fully converged solution and the computational results are obtained. The computed peak electron densities in the clean air flowfield agree well with experimental results.

关 键 词：化学非平衡 粘性流 NS方程 飞行器 TVD 差分格式 

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]