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以钝体绕流驻点线流场为例，应用直接仿真蒙特卡罗法（DSMC），模拟了五组元混合气体（N2、O2、N、O、NO）中的碰憧传能松弛、离解反应、交换反应及复合反应。给出了碰撞分子各自由度间的能量交换模式及各类化学反应的选择模式。DSMC仿真结果与宏观粘性激波层方程计算结果，在飞行高度较低时基本相符，表明采用的热化学非平衡模式是令人满意的。随着飞行高度增高稀薄气体效应增大，二者在激波附近有显著差异，表明高空飞行必须考虑热化学非平衡效应和稀薄气体效应。
Taking the bluff body flow around the stationary line as an example, the direct simulation Monte Carlo method (DSMC) was used to simulate the relaxation of the convective energy in the five component mixed gases (N2, O2, N, O, NO) Dissociation reaction, exchange reaction and compound reaction. The mode of energy exchange between various degrees of freedom of collision molecules and the selection mode of various chemical reactions are given. The results of DSMC simulation and macroscopic viscous shock wave equation are basically consistent with the low flight altitude, indicating that the thermochemical non-equilibrium mode is satisfactory. As the flying height increases, the lean gas effect increases, and there is a significant difference between the two in the vicinity of the shock wave, indicating that the high-level flight must consider the thermochemical non-equilibrium effect and the lean gas effect.