基于新给料方式的重介质旋流器流场的研究

摘要

Aiming at the turbulence and steering mutation problem of heavy medium cyclone guide cylinder section ,we design a new feeding form of heavy medium cyclone ,its main characteristic is the material inlet tilt to the bottom end .On the basis of PIV experimental research ,using RSM model in FLUENT to simulate the flow field of heavy medium cyclone with new feeding form .Experiment and simulation results show that ,in the same feeding pressure ,compared with the traditional cyclone ,the new cyclone has higher tangential velocity and lower center negative pressure ,this shows that the new feeding form can effectively reduced the energy consumption in the cyclone ,beneficial to increase the centrifugal coefficient ,improve the separation efficiency .%针对目前重介质旋流器导向筒段湍流及转向突变较大的问题，设计出入口向底流端倾斜的新给料方式重介质旋流器。在PIV试验研究的基础上，在FLUENT 中选用RSM 模型对新给料方式重介质旋流器的流场进行了数值模拟。试验和模拟结果表明，在相同给料压力下，新给料方式旋流器相比传统给料方式旋流器，在相同横截面处切向速度增大，中心负压减小，这表明该给料方式可以有效降低旋流器内的能耗，有利于增大旋流器的离心系数，提高分选效率。