摘要
An approximate collision-radiative method is developed to calculate energy level populations of atoms and applied to simulate radiative transfer in a shock layer.Considering nonequilibrium plasmas with the electronic temperature below 20000 K,we introduce correction factors to the Saha–Boltzmann equation and simplify the master equation of the full collision-radiative model.Based on the method,the error of heat flux is smaller than 5%in a two-cell problem and smaller than 7%in the Stardust re-entry flow field compared with the correlated-k method.Furthermore,almost a factor of 2 is obtained in the improvement of computational efficiency compared with the nonequilibrium air radiation(NEQAIR)code.The results show that the present method is reliable and efficient.
基金
Supported by the National Natural Science Foundation of China under Grant No 61007047
the Project of Development Program for National Defense Technology under Grant No 2011BAK03B07-3.
