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.
出处
《计算物理》
CSCD
北大核心
1997年第1期6-12,共7页
Chinese Journal of Computational Physics
基金
国防预研基金
关键词
化学非平衡
粘性流
NS方程
飞行器
TVD
差分格式
Chemical non equilibrium viscous flows
Navier Stokes Equations
Hypersonic re entry vehicle
TVD difference scheme.
