射流流化床中锥形分布板对流动的影响  

Influence of V-shaped Gas Distributor on Flow in a Gas-Solid Jet Fluidized Bed

作　　者：洪若瑜[1] 

机构地区：[1]苏州大学化学化工学院,合成化学江苏省重点实验室,江苏苏州215123

出　　处：《过程工程学报》2006年第6期864-871,共8页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:20476065);中国科学院多相反应重点实验室基金资助项目(编号:2003-2);中国科学院煤转化国家重点实验室基金资助项目(编号:2004-309);合成化学江苏省重点实验室基金资助项目;国家教委留学回国基金资助项目;苏州大学211工程基金资助项目;基础课化学实验教学中心开放课题资助项目

摘　　要：给出了具有锥形分布板的射流流化床中浓密气固两相流动的多相流体力学基本方程组.采用二维正交曲线坐标并生成了数值网格,用改进的IPSA方法求解二维正交曲线坐标中的多相流基本方程组,并编制了大型通用程序,流场可视化使用Tecplot软件.对于给定的模拟计算,计算结果与实验值吻合.模拟计算中改变了锥形筛板的角度、射流管的直径、床层高度、分布板开孔率的分布、射流气速、床层表观气速等,通过模拟得到床内的流动图像,考察了射流高度及颗粒循环的影响.The governing equations of multiphase hydrodynamics for describing dense gas-solid two-phase flow in a jet fluidized bed with conical gas distributors were provided. The numerical simulations were based on two-dimensional （2-D） general orthogonal grid. The numerical meshes were obtained by solving two Laplace equations iteratively. The improved IPSA algorithm was employed to solve the governing equations on the generated numerical meshes. A general-purpose CFD computer for 2-D simulations was developed. The post-processing was performed using Tecplot. For a typical case, the computed results were consistent with the experimental measurements. The angle of conical gas distributor, nozzle diameter, bed height, aperture distribution of holes in gas distributor, jet velocity and superficial gas velocity in bed were varied in the numerical simulation to study the flow patterns, the jet penetration heights and the solid particle circulation.

关 键 词：射流 流化床 多相流体力学 计算机模拟 

分 类 号：TQ016[化学工程]