CFD Simulation On The Pressure Drop Reduction Of Integrated Rotate Cyclone Separator

Integrated rotate cyclone separator, short for YTJ, is mainly used for separating fine particle, proposed by professor Liu. YTJ consists of a centrifugal impeller used for providing powerful centrifugal force. Several senior fellows have investigated YTJ by experiment, theoretical analysis and numerical simulation, since YTJ was invented. CFD simulation was used in this paper to investigate pressure drop reduction of YTJ. These following conclusions can be achieved by this paper:(1) The mean velocity and mean pressure drop of Stairmand cyclone could be well predicted by RSM model. The calculated velocity fluctuations achieved by RSM model was underestimated, and then lead to a overestimated separation efficiency for fine particle. Although there have some limitation of prediction for fine particle, the large particle' separation calculated by RSM model is accurate. Applying Muschelknautz model, fairly precise predictions of large particle can be achieved, but a very underestimated separation was obtained for fine particle.(2) Compared the cyclone, the flow field of YTJ is similar where have a so-called ‘Rankine vortex', but the magnitude of tangential velocity, grade efficiency and pressure is much higher. Meanwhile, YTJ was failed to satisfied the aim of centrifugal vanes' power capability exceed the energy consumption of YTJ.(3) Compared the way of lengthening cylindrical length, adding some guide vanes could result in a greater decrease about pressure drop, and a small effect on cut-size of YTJ. The advantage of lengthening cylindrical length is lead to a small effect on separation efficiency of large particle. The turbulent fluctuation of YTJ was weakened when adding some guide vanes, which is useful for separation of fine particle.