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本文通过对三种双时间尺度湍流模型的理论分析，选择出最合理的模型，并在其基础上引入非线性Reynolds应力─应变关系式及梯度Richardson数修正，对有旋湍流场进行计算，其结果表明，双时间尺度模型能较好地预测出复杂湍流场中平均物理量的分布，尤其对回流区大小和强度的预测较常规k-ε模型结果有很大改进。因此，本文将双时间尺度模型应用于旋流燃烧器中气体颗粒两相流动的计算。
Based on the theoretical analysis of three dual time-scale turbulence models, the most reasonable model is selected, and based on the nonlinear Reynolds stress-strain relationship and gradient Richardson number correction, the turbulent flow field is calculated The results show that the dual time-scale model can predict the distribution of averaged physical quantities in complex turbulent flow well. Especially, the prediction of size and strength of recirculation zone is greatly improved compared with the conventional k-ε model. Therefore, a dual time-scale model is applied to the calculation of gas particle two-phase flow in a swirl burner.