浑水水力分离清水装置进口及底孔对流场影响的数值模拟

为研究浑水水力分离清水装置的进口尺寸、进口流速和底孔孔径发生改变时对流速场的影响，采用重整化群k－ε模型对装置内的清水流场进行了3维数值模拟。模拟结果表明：流量不变的情况下进口尺寸的增加将会增加柱体区的切向流速和锥体区的径向流速，装置对进口流速的变化较为敏感，因此处理较大流量时应该优先考虑增加进口尺寸;底孔孔径的增加将会增加锥体区的切向及轴向流速，有利于装置中泥沙的排除，但同时将会导致清水溢出量减少。

Numerical Simulation on Flow Field Influenced by Inlet and Bottom Outlet in Turbid Water Hydraulic Power Separation Device

Based on the Renormalization Group model, a three-dimensional wate-phase flow field in the turbid water hydraulic power separation device was numerically simulated.Then the influence of different inlet dimension,inlet velocity and bottom outlet aperture was investigated based on the simulations. Results showed that the increase of inlet dimension increases the tangential velocity of cylinder region and radial velocity in cone region when discharge is constant,and the flow field of the device is more sensitive to inlet velocity,so when dealing with large discharge should be given priority to increasing inlet dimension.Besides,tangential and axial velocity in cone region will increase with increasing bottom outlet aperture,which helps sediment desilting of device,but leads to the reduction of separated clear water discharge.