Total collision energy (TCE) model is widely used in the direct simulation Monte Carlo (DSMC) method for reactive flows.A numerical assessment of quantum-kinetic (Q-K) model has been conducted in this paper by comparing with the TCE chemical model,and the differences between the two chemical models have been illustrated particularly.The result indicates that the prediction of the Q-K model has good agreement with the theoretical value while the TCE model underestimates the nitrogen dissociation degree at low temperature.When the nonequilibrium effect on the dissociation rate is taken into consideration,the Q-K model has highly similar performance as the Park's two-temperature model while the TCE model overestimates this effect compared with the Park's model.In addition,the computational result indicates that the predicted nonequilibrium dissociation rate of the TCE model is closer to that of the Park's two temperature model than that of the Q-K model.%总能碰撞模型(TCE)是直接模拟蒙特卡洛(DSMC)方法中最为广泛使用的化学反应模型,本文通过对比TCE模型对最近提出的量子-动理学(Q-K,quantum-kinetic)模型进行数值评估,并对二者之间的差异给出合理的分析说明.研究结果表明,Q-K模型在整个离解度范围内与理论值精准吻合,TCE模型在低离解度时则具有较大的误差.在描述离解速率中的非平衡效应时,Q-K模型与Park双温度模型高度吻合,而TCE模型却高估了这种非平衡效应.此外,本文结果还表明,TCE模型实现的非平衡离解速率比Q-K模型更接近Park双温度模型的结果.
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