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以α型旋流器的溢流管为研究对象,采用CFD软件Fluent6.2提供的雷诺应力模型(RSM)对溢流管结构进行数值模拟。研究圆柱型和渐扩型溢流管结构对旋流器分离效果的影响、分析不同截面切向速度、轴向速度、压力等参数分布规律、并以水-细砂为实验物系进行了对比实验。模拟和实验结果表明:渐扩型溢流管结构使溢流口处流场更加稳定,部分动能转化为静压能,降低了设备的能耗,提高了设备的分离效率,确定设备的最佳流速为4.5 m/s左右。
Taking the overflow tube of α-cyclone as the research object, the structure of overflow tube was numerically simulated by Reynolds stress model (RSM) provided by CFD software Fluent 6.2. The influence of cylinder type and divergent overflow pipe structure on the separation efficiency of cyclone was studied. The distribution of parameters such as tangential velocity, axial velocity and pressure of different cross sections were analyzed. The water-fine sand was used as the experimental system experiment. Simulation and experimental results show that the structure of gradually expanding overflow pipe makes the flow field at the overflow port more stable and some kinetic energy is converted into static pressure energy, which reduces the energy consumption of the equipment, improves the separation efficiency of the equipment and determines the best equipment The flow rate is about 4.5 m / s.