导叶式液液旋流器内油相浓度分布数值模拟

采用雷诺应力模型（RSM）和双流体模型对导叶式液液旋流器内的油相浓度分布进行数值模拟，考察了操作参数、物性参数和空气柱对油相浓度分布的影响，将模拟所得分离效率与实验结果进行对比，可靠性得到验证。结果表明：油水两相流场中，油相浓度随径向位置的增大而减小，随轴向位置的减小而减小；结合Stokes定律分析，发现在入口流速增大、油水密度差增大和入口油相浓度增大时，油相更易向轴心处聚集由溢流口排出，有助于提高分离效果；空气柱的存在从根本上改变了旋流器内原有油水两相的浓度分布规律。

Simulation of oil-phase concentration field in vane-guided hydrocyclone

The oil-phase concentration distribution in a vane-guided hydrocyclone was numerically simulated with the Reynolds stress model and Euler-Euler method.The effects of operating parameters, physical parameters and air core on the oil-phase concentration field were studied.Predictions are in reasonable agreement with the experimental results.The oil concentration decreased as the radial position increased and as the axial position decreased in the water-oil flow field.The analysis with Stokes law showed that the tendency of oil moving to the axis and overflowing out increased with the increase of inlet velocity, density difference of oil and water, and inlet concentration.Moreover, the air core changed the concentration distribution in the hydrocyclone, so that water, oil and air formed a water-oil-air flow field from wall to axis.