基于CFD技术的旋风分离器减阻性能研究

Research of Pressure Drop Reduction in Cyclone Separator Based on CFD Technology

利用雷诺应力模型对旋风分离器气相流场进行数值模拟研究,在此基础上对安装在旋风分离器排气芯管下口的双进口螺旋减阻装置进行了研究,并通过与直径为205mm的Stairmand旋风分离器和直径为150mm的Bohnet型旋风分离器的试验数据进行比较,结果表明,减阻装置可以使排气管下口切向速度降低,内外漩涡交接面半径明显外移,合理改变旋风分离器内部压力分布,能有效降低旋风分离器的压力损失35%以上。研究结果还表明,旋风分离器数值模拟结果和试验数据吻合较好,应用计算流体动力学(CFD)来研究旋风分离器性能方便且可行。

The gas flow fields of cyclone separators were simulated using Reynolds stress transformation model. Based on this, a new mechanical device with two-spiral inlet to reduce pressure drop is presented and discussed. The simulation results of Stairmand of 205mm in diameter and Bohnet of 150mm show that a reduction in pressure drop of above 35%, a shift of peak of tangential velocity towards walls between double vortex and the reasonable change of the pressure profile. The research results also show that the data of numerical simulation is in agreement with the experimental data, so it is feasible and cheap to investigate the performance of cyclone separator by computational fluid dynamics (CFD).