基于CFD-DPM的旋风分离器结构设计优化

Structure optimization and design of cyclone separator based on CFD-DPM

采用计算流体力学离散颗粒模型(CFD-DPM),结合响应曲面法,通过系列正交实验,对旋风分离器结构进行优化设计;考察旋风分离器的7个结构参数以及参数间的交互作用对其性能的影响。结果表明:对压降和分离效率影响最显著的结构参数为排气管直径,然后分别是入口高度、入口宽度、旋风分离器长度、排气管插入深度;入口尺寸与排气管直径对压降的影响存在很强的交互作用;旋风分离器长度与排气管插入深度、入口宽度与排气管直径、入口宽度与旋风分离器长度及排气管直径与旋风分离器长度对分离效率的影响存在较强的交互作用,其余因素影响不显著;通过对各结构参数的响应面进行优化,获得该旋风分离器在最小压降和最大分离效率时对应的几何结构参数。

A series of orthographic experiments were designed to optimize and design the cyclone separator geometry by adopting the CFD-DPM(computational fluid dynamics-discrete particle model)and the response surface method.The effect of seven cyclone geometrical parameters and their interactions on the performance were investigated.The results show that the most significant geometrical parameter is the vortex finder diameter.Other factors of the inlet width,inlet height,total cyclone height,and vortex finder length have significant effects on the cyclone performance.In addition,there are strong interactions between the effect of the inlet dimensions and the vortex finder diameter on the pressure drop.There are strong interactions between the effect of the vortex finder length and total cyclone height,inlet width and vortex finder diameter,inlet width and total cyclone height,vortex finder diameter and total cyclone height on the separation efficiency.Finally,a new set of geometrical ratios are obtained to achieve minimum pressure drop maximum separation efficiency by optimization of the response surface of each index.