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采用RSM(雷诺应力模型)对旋风分离器内气相流场进行了数值模拟,计算得到不同简体长度旋风分离器内流场的流动特性,结果表明分离器内的切向速度随着简体长度的减小而增大;气体旋转运动的强度越强,分离效率越高。但筒体长度过短时,湍动能在内外涡分界面处有较大波动,使分离效率降低;当进口气速一定时,旋风分离器的压降随着筒体长度的增加而降低。
The gas flow field in a cyclone was numerically simulated by RSM (Reynolds stress model), and the flow characteristics of the flow field in different lengths of cyclones were calculated. The results show that the tangential velocity in the separator decreases with the decrease of the length Small and increase; the stronger the intensity of gas rotary motion, the higher the separation efficiency. However, when the cylinder length is too short, the turbulent kinetic energy can fluctuate greatly at the vortex boundary between the inner and outer vortex to decrease the separation efficiency. When the inlet air velocity is constant, the pressure drop of the cyclone decreases with the increase of cylinder length.