基于CFD-DPM的旋风分离器结构优化

Structure Optimization of Cyclone Separator Based on CFD-DPM

采用CFD-DPM方法,结合响应曲面模型对旋风分离器结构参数进行优化。研究发现:对压降和分离效率影响最大的结构参数为排气管直径Dx/D,其次是入口高度a/D、入口宽度b/D、旋风分离器长度H/D、排气管插入深度S/D。通过分析各结构参数的交互作用发现:入口宽度与入口高度,入口尺寸与排气管直径对压降的影响存在较强的交互作用;排气管直径与入口高度、排气管插入深度及旋风分离器长度对分离效率的影响存在较强的交互作用。最后,基于CFD-DPM模拟计算结果获得该旋风分离器在最小压降和最大效率下对应的几何结构参数,即在a/D、b/D、Dx/D、H/D、S/D取值分别为0.40、0.26、0.34、6.28、0.66时,压降为2.32 kPa,分离效率为99.27%。

The CFD-DPM(computational fluid dynamics-discrete particle model)and the response surface methodology has been performed to optimize the geometrical ratios of cyclone separator.The research results illustrate that the most significant geometrical parameter is the vortex finder diameter.Other four factors have significant effects on the cyclone performance viz.,the inlet width,inlet height,the cyclone total height,and the vortex finder length.In addition,there were strong interactions between the effect of the inlet width and inlet height,inlet dimensions and the vortex finder diameter on the pressure drop.There were strong interactions between the effect of the vortex finder diameter and inlet height,the vortex finder length and the cyclone total height on the separation efficiency.Finally,a new set of geometrical ratios was obtained to achieve minimum pressure drop and maximum separation efficiency.When the value of a/D,b/D,Dx/D,H/D,S/D was 0.40,0.26,0.34,6.28,0.66,respectively,the minimum pressure drop was 2.32 kPa and the maximum separation efficiency was 99.27%.