流化床内非等密度双组分颗粒流动特性的研究  

A Study of the Flow Characteristics of Non-isodensity and Dual-component Particulates in a Fluidized Bed

作　　者：刘阳[1] 刘文铁[1] 何玉荣[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

出　　处：《热能动力工程》2005年第6期615-618,共4页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(50376013);哈尔滨工业大学交叉基金资助项目(MD2002;31)

摘　　要：基于颗粒动力学和气固两相流体动力学,建立流化床稠密气-固两相非等密度双组分颗粒运动碰撞解耦模型,采用硬球模拟方法研究颗粒间碰撞,大涡模拟方法研究气相湍流流动。基于牛顿第二定律建立单颗粒运动方程,应用牛顿第三定律确定颗粒相和气相相间相互作用的双向耦合。数值模拟二维鼓泡流化床内非等密度双组分颗粒气-固两相流动,计算结果表明颗粒弹性恢复系数影响分层流动特性。On the basis of particulate dynamics and gas-solid two-phase hydrodynamics set up was a movement-collision decoupled model for the dense gas-solid two-phase and non-isodensity dual-component particulates in a fluidized bed. By using a hard sphere simulation method the collision among particulates was studied with a large eddy simulation method being employed to study gas- phase turbulent flows. A single-particulate movement equation was established based on Newton's second law. Newton's third law was applied to determine the two-way coupling resulting from the interaction of particulate phase and gas phase. A numerical simulation was performed for the gas-solid two-phase flow of the non-isodensity dual-component particulates in a two-dimensional bubbling fluidized bed. The calculation results indicate that the recovery factor of particulate elasticity may have an impact on laminar flow characteristics.

关 键 词：非等密度双组分颗粒 硬球模型 大涡模拟 流化床 分层流动 

分 类 号：O241[理学—计算数学]