入料角对重介质旋流器流场影响的数值模拟研究

Numerical simulation research on the influence of feeding angle to the flow field of heavy medium cyclones

在PIV试验的基础上，利用FLUENT软件中的RSM模型对不同入料角的有压两产品重介质旋流器的流场进行了模拟。结果表明，在相同的入料压力下，与传统90°入料角重介质旋流器相比，入料角减小后旋流器的三维速度均有不同程度的增加，流体流动加强；同时旋流器内旋流区域增大，以零轴向速度包络面（LZVV）为界面外扩，从而使矿物的实际分选密度有所提高；当入料角减小到某临界角度时，切向速度不再继续增大，由数值模拟结果推测该临界角度在83°～85°之间。

Based on PIV experimental research, using RSM model in FLUENT to simulate the flow field of pressure-fed 2-product heavy medium cyclones with different feeding angles. The results showed that under the same feeding pressure, compared to the traditional 90° feeding angle heavy medi- um cyclones, three-dimensional velocity increases in various degrees as feeding angle decreases, the fluid flow is being strengthened. At the same time the rotational flow vortex area is enlarged, extend LZVV interface, thereby causing the actual separation density of mineral is increased; when feeding angle de- creases to a critical point, tangential velocity is no longer continue to increase. The numerical simulation results indicate that the critical angle is between 83°-85°.