振动流化床内颗粒运动特性的CFD-DEM研究  

CFD-DEM Investigation on Motion Characteristics of Particles in Vibrating Fluidized Bed

作　　者：王晓静[1] 于雪 WANG Xiao-jing;YU Xue(School of Chemical Engineering and Technology,Tianjin University)

机构地区：[1]天津大学化工学院

出　　处：《化工机械》2021年第6期872-878,共7页Chemical Engineering & Machinery

摘　　要：基于计算流体力学-离散单元法(CFD-DEM)探讨了不同振动参数对颗粒跳动高度、碰撞次数和颗粒停留时间的影响规律。结果表明:随着振动强度的增加,颗粒与气体分布板的碰撞点逐渐后移;颗粒跳动高度随振动参数的增大而呈线性增大;随着振动频率、振动幅值的增大和振动角度的减小,颗粒碰撞次数减少,颗粒停留时间缩短。Based on the computational fluid dynamics and discrete element method(CFD-DEM),the influence of different vibration parameters on the height of particle jump,the number of particle collisions and the mean residual time of particles were discussed.The results show that,as the vibration intensity increases,the collision point between the particles and the gas distribution plate gradually moves back,and the particle jumping height increases linearly with the increase of vibration parameters.With the increase of vibration frequency and vibration amplitude and the decrease of vibration angle,the number of particle collisions decreases and the mean residual time of particles become shortened.

关 键 词：干燥机 振动流化床 计算流体力学-离散单元法(CFD-DEM) 跳动高度 碰撞次数 平均停留时间 

分 类 号：TQ051.892[化学工程]