基于颗粒相间曳力模型的鼓泡流化床流动特性数值模拟  

Hydrodynamics of a Freely Bubbling Fluidized Bed Numerical Simulation Based on Particle-particle Drag Force Model

作　　者：李珺[1] 薛长智 宋文龙[1] 汪新智[3] 

机构地区：[1]东北林业大学 [2]哈尔滨电站设备成套设计研究所有限公司 [3]哈尔滨工业大学

出　　处：《电站系统工程》2013年第4期4-6,共3页Power System Engineering

基　　金：中央高校基本科研业务费专项资金资助(No.Dl12BB11);黑龙江省博士后资助(No.LRB11-334)

摘　　要：基于欧拉-欧拉双流体气固两相流模型,数值模拟研究了床内具有两种不同颗粒尺寸、底部均匀布风的鼓泡流化床气固两相流体动力特性。采用颗粒-颗粒相间曳力模型,考察了大颗粒及小颗粒的分离情况。研究结果表明考虑颗粒-颗粒相间曳力模型,气体能够充分地与固体颗粒发生相互作用,表明在数值模拟中考虑颗粒-颗粒相间曳力模型可以更合理地预测床内气固两相流动特性。Euler-Euler two-fluid model is used to numerically investigate the flow dynamics of gas-solid two-phase flow in a freely bubbling fluidized bed with two different sizes particles and a uniform gas inlet. The particle-particle drag model is used to analyze the characteristics of large and small particles particle segregation. Numerical results indicate that gas can fully interact with solid phase. It is more reasonable to forecast the gas-solid two-phase characteristics with this kind of drag model.

关 键 词：鼓泡流化床 颗粒-颗粒相间曳力模型 数值模拟 

分 类 号：TQ018[化学工程]