鼓泡流化床内颗粒分离行为模拟研究  

Simulation of Particle Segregation Behavior in Bubbling Fluidized Bed

作　　者：汪新智[1] 王天宇[1] 李春霆 彭稳根[1] 刘文铁[1] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]中国电力工程有限公司,北京100048

出　　处：《节能技术》2012年第3期203-206,共4页Energy Conservation Technology

基　　金：国家自然科学基金委员会-中国石油天然气集团公司石油化工联合基金资助项目(U1162122)

摘　　要：颗粒-颗粒相间曳力是影响鼓泡流化床流体动力行为的重要因素之一。本文基于欧拉-欧拉双流体气固两相流模型,采用考虑了颗粒分离斜度系数的颗粒-颗粒相间曳力模型,对床内具有两种不同颗粒尺寸、底部均匀布风的鼓泡流化床进行了数值模拟研究,并将模拟结果与Owoyemi等的实验及数值模拟结果进行了比较。研究结果表明考虑颗粒分离斜度系数的颗粒-颗粒相间曳力模型合理地预测和分析了床内颗粒分离等特性。Particle-particle drag is one of the most important influencing factors of the fluid dynamic behavior in a bubbling fluidized bed.Based on an Euler-Euler gas-solid two phase model,a particle-particle drag model considering particle slope coefficient of segregation is presented for simulation of the bubbling fluidized bed with two different sizes particles and a uniform gas inlet.Comparing the simulating results with Owoyemi’s experimental and numerical results,it can be seen that the particle-particle drag model,considering the particle slope coefficient of segregation,can well predict and analyze the characteristics of particle segregation in the bubbling bed.

关 键 词：鼓泡床 颗粒分离 欧拉-欧拉模型 颗粒-颗粒相间曳力模型 分离斜度系数 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]