高超声速非平衡流场多个振动温度模型的数值研究

Numerical studies of the multiple vibrational temperature model in hypersonic non-equilibrium flows

利用数值求解热化学非平衡Navier-Stokes方程的方法,建立了考虑一个和多个振动温度的高超声速热化学非平衡流场的CFD计算程序,并对半球模型和球锥模型进行了数值计算,研究结果表明:(1)各个分子组分的振动温度分布于考虑一个振动温度模型的振动温度周围,即一个振动温度模型的振动温度是多个振动温度模型的各个分子组分振动温度的一种平均值;(2)在模型身部,振动温度的峰值高于平动温度的峰值;在模型近尾出现振动温度冻结并高于平动温度。

The CFD code was developed for thermal and chemical non-equilibrium hypersonic flows by solving numerically Navier-Stokes equations, considering the vibrational energy mode of one or multiple vibrational temperature. Numerical simulations were done for thermal and chemical non-equilibrium hypersonic flows around a sphere and bunt-body, and the following research results were obtained： （ 1 ） the vibrational temperatures of molecular species are among the vibrational temperature of one temperature model, namely the vibrational temperature of one temperature model is the average of the vi- brational temperatures of molecular species; （2）the peak value of vibrational temperature is higher than that of translational temperature at the body of bunt-body, and the frozen phenomenon of the vibrational temperature appears in the flow of afterbody.