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采用雷诺应力模型对水力旋流器内水相流场进行了数值模拟,在此基础上利用颗粒随机轨道模型模拟泥沙颗粒相,在模型中考虑了颗粒由于湍流脉动而引起的扩散。并讨论了水力旋流器溢流管、底流管、筒体和锥角等结构参数对颗粒分离效率和压力降的影响。计算结果表明,不同结构参数的水力旋流器的颗粒分离效率和压力降有较大差别,在实际应用中,应根据不同要求选择合适参数的水力旋流器。
The Reynolds stress model was used to numerically simulate the flow field in the hydrocyclone. Based on this model, a particle random orbit model was used to simulate the sediment particle phase. The diffusion of particles due to turbulent pulsation was considered in the model. The effects of structure parameters of hydrocyclone overflow pipe, bottom-flow pipe, cylinder and cone angle on particle separation efficiency and pressure drop were discussed. The calculation results show that the hydrocyclones with different structural parameters have great differences in particle separation efficiency and pressure drop. In practical applications, hydrocyclones with appropriate parameters should be selected according to different requirements.