数值模拟颗粒旋转对流化床内气固两相流动特性的影响  

NUMERICAL SIMULATIONS OF EFFECT OF PARTICLE ROTATION ON GAS AND SOLID FLOW BEHAVIOR IN FLUIDIZED BEDS

作　　者：王淑彦[1] 赵云华[1] 姜健 刘国栋[1] 陆慧林[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]哈尔滨岁宝热电股份有限公司,黑龙江哈尔滨150001

出　　处：《工程热物理学报》2007年第2期262-264,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.20606006;No.20490200)

摘　　要：流化床内颗粒自旋转将影响颗粒相的流动特性．本文运用基于颗粒动理学理论的欧拉-欧拉气固多相流模型,考虑颗粒自旋转流动对颗粒碰撞能量交换和耗散的影响,数值模拟流化床内气体颗粒两相流动特性．计算结果表明颗粒的自旋转使得床内更容易形成气泡,颗粒浓度分布变化增大．颗粒自旋转运动将导致床内非均匀结构更明显．Numerical analyses of effect of particle rotation on gas and particles flow behavior were performed using two-fluid flow model combining with the kinetic theory of granular flow. The energy dissipation due to particle rotation is taken into account in the model by the effective inelastic coefficient of restitution. Simulations show that bubbles are more formed in the bed with particle rotation due to the more energy dissipated by rotation. The fluctuations of particle concentrations are more intense due to bubbles motions in the bed. The nonhomogenous flow structure of particles will be evidence considering particle rotation which will be effect the macro-flow structure of particles in the bed.

关 键 词：颗粒旋转 颗粒动理学 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]