旋风分离器在不同工况下分离效率的仿真分析

针对旋风分离器的适用性问题,研究了不同工况条件下各工作参数对分离效率的影响.选择了环境参数为固体颗粒粒径和密度,分离器工作参数为进口速度,基于FLUENT运用RNG k-ε模型模拟旋风分离器内气相紊流,采用了离散相模型（DPM）模拟固相流场颗粒轨迹.由于粒径、密度和进口速度分别变化具有多种组合,为此引入了正交试验法以图减少仿真的次数.讨论了在不同颗粒粒径和颗粒物密度条件下旋风分离器的进气口速度与分离效率之间的关系.研究结果表明,在不同工作环境下旋风分离器工作参数对分离效率有着重要的影响.

Simulation analysis of separation efficiency of cyclone separator under different conditions

Aiming at the cyclone separator＇s applicability, the separation efficiency afiected by working conditions was studied. The solid particle size and density were selected as environment parameters and the inlet velocity as working parameters. Based on FLUENT, the RNG k-ε model and discrete phase model（DPM） were used to simulate the turbulent flow of gas phase and particle trajectory of solid phase re- spectively in cyclone separator. Because the particle size, density and inlet velocity change respectively will produce a variety of combinations, the orthogonal test method was introduced to reduce the number of simulation. The relationship between the cyclone separator inlet velocity and separation efficiency was discussed under different particle size and density. The results indicate thai working parameters of cyclone separator has significant influence on the separation efficiency in different environment.