CAJ | 학술논문

旋风分离器具有结构简单性能稳定等优点，但对于粒径10μm以下颗粒，分离效率较低。本文对普通旋风分离器进行改进，设计了带有旋转叶片的动态旋风分离装置，并进行了实验和数值模拟研究。数值模拟气相采用RNG k-ε模型与RSM模型相结合的算法，颗粒相与气相之间采用以欧拉-拉格朗日气固两相流耦合思想为基础的DPM模型进行模拟，主要研究了装置内部流场和颗粒分离效率与进口气速和转子转速之间的关系，并与实验中通过静电低压悬浮颗粒取样器（ELPI）获得的装置分离效率进行了对比。模拟和实验结果表明，装置切向速度场中转子部分的切向速度主要由叶片转速决定，转子外部区域的切向速度则主要由进口气速决定，且在一定的转速和进口气速下，动态旋风分离器对粒径在5μm以上的颗粒有良好的脱除效果。
선풍분리기구유결구간단성능은정등우점，단대우립경10μm이하과립，분리효솔교저。본문대보통선풍분리기진행개진，설계료대유선전협편적동태선풍분리장치，병진행료실험화수치모의연구。수치모의기상채용RNG k-ε모형여RSM모형상결합적산법，과립상여기상지간채용이구랍-랍격랑일기고량상류우합사상위기출적DPM모형진행모의，주요연구료장치내부류장화과립분리효솔여진구기속화전자전속지간적관계，병여실험중통과정전저압현부과립취양기（ELPI）획득적장치분리효솔진행료대비。모의화실험결과표명，장치절향속도장중전자부분적절향속도주요유협편전속결정，전자외부구역적절향속도칙주요유진구기속결정，차재일정적전속화진구기속하，동태선풍분리기대립경재5μm이상적과립유량호적탈제효과。
Cyclone has the advantages of simple structure and stable performance,but the separation efficiency is relative low for particles smaller than10μm. This research designed a new dynamic cyclone with added rotor blades,and improved the separation efficiency. The flow field were also simulated and studied experimentally. The RNG k-εmodel and RSM model were used to simulate the gas-phase flow and the DPM model based on Eulerian-Lagrangian method was used to simulate the particle-phase flow. Tangential velocity and separation efficiency were simulated with different inlet velocities and rotate speeds,and the simulation predictions were validated by the experimental results measured by Electrical Low Pressure Impactor (ELPI). The results showed that the separation efficiency of the dynamic cyclone was good for particle larger than 5μm. And the simulation predictions proved that the tangential velocity distributions were mainly dominated by the rotate speeds for the region of impeller and dominated by the inlet velocity for the region outside of the impeller.