化学非平衡尾迹流场的数值计算

高超音速化学非平衡尾迹流场的分析及计算是再入空气动力学的一个重要课题。本文采用轴线极限方程，成功地消除了控制方程在轴线上的奇性；采用二阶精度的中心差隐格式，求解了抛物化的Ｎ－Ｓ方程，得到了２０ｋｍ及６０ｋｍ再入时尾迹流场的数值解。计算结果表明，在远尾迹场，对电子数密度的主要影响是Ｏ_２的吸附反应。

Numerical Computation of Chemical Non-equilibrium Wakes

The analysis and computation of chemical non-equilibrium hypersonic wakes are important tasks of reentry aerodynamics. This paper, using axial equations, successfully climinates the axial sigularity in governing equations. Using central differences secret scheme with two rand accuracy, it has solved the parabolic N-S equations and obtained numerical solutions of wakes at 20 km and 60 km, The results show that the effect of oxygen-electron attachment processes on electron density in far wakes is important.