旋流流化床数值模拟及颗粒运动分析  

Numerical Simulation and Motion Analysis of Particles in Cyclone Fluidized Bed

作　　者：李宗哲 王黎望 陈迩文 杨伟辉 马良[1] LI Zongzhe;WANG Liwang;CHEN Erwen;YANG Weihui;MA Liang(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《华东理工大学学报（自然科学版）》2022年第4期556-564,共9页Journal of East China University of Science and Technology

基　　金：国家自然科学基金(21878099)。

摘　　要：对单旋流和双旋流两种结构的流化床内部流场进行了分析,采用欧拉多相流模型研究了流化床内颗粒的分布状态和速度大小分布等,对比观察两种结构的颗粒簇的轴向爬升特性以及死区分布,结果表明双旋流结构流化床内颗粒的流化程度更好,颗粒分布更加均匀稳定。并采用Fluent耦合离散元分析软件EDEM分析了两种结构的颗粒运动特性,发现颗粒轴向运动呈现加速与减速交替,双旋流结构流化床的流化性能更优,可以使颗粒更快达到稳定状态。The inner flow field in cyclone fluidized bed with single swirler and double swirler structure was analyzed. The Eulerian multiphase flow model was used to analyze the distribution state and velocity distribution of the particles, and the axial climbing characteristics and dead zone distribution of the particle clusters with two structures were compared and observed. The results showed that the fluidization degree of the double swirler structure was better, and the particle distribution was more uniform and stable. The Fluent coupled discrete element analysis software EDEM was used to analyze the particle motion characteristics of two structures. It was found that the axial motion of the particles alternated between acceleration and deceleration. The fluidized bed with double swirler structure had better fluidization performance and could make particles reach stable state faster.

关 键 词：旋流流化床 运动轨迹 FLUENT 离散元 受力分析 

分 类 号：TQ051.1[化学工程]