CPFD在细颗粒料仓下料中的应用  

Application of CPFD in hopper discharge of fine granular material

作　　者：赵伟[1] 陆海峰[1] 郭晓镭[1] 龚欣[1] 

机构地区：[1]华东理工大学煤气化及能源化工教育部重点实验室,上海市煤气化工程技术研究中心,上海200237

出　　处：《化工学报》2015年第2期512-521,共10页CIESC Journal

基　　金：国家自然科学基金项目(21206041);中国博士后科学基金项目(2012M520847);中央高校基本科研业务费专项资金项目~~

摘　　要：借助计算颗粒流体力学(CPFD)的数值模拟方法,研究了细颗粒玻璃微珠在不同结构料仓内的下料特性,获得了料仓出口直径和半锥角对颗粒下料流动的影响。在实验室可视化下料平台开展了验证实验,模拟结果与实验结果吻合较好。模拟结果表明:下料流率与料仓出口直径2.5次方呈正比;料仓半锥角增大,下料流型从质量流过渡至漏斗流。CPFD模拟给出了料仓下料过程的细节信息,并获得了料仓结构对颗粒流动形态转变的临界面相对高度的影响。The flow of 82 μm-diameter powder and the effect of hopper structure（hopper diameter, angle） on transition surface height and flow pattern in a 3D conical hopper were studied using the computational particle fluid dynamic（CPFD） numerical scheme. The validity of the calculated results was confirmed by comparing them with experimental results. CPFD simulation was fully capable of reproducing the discharging process. CPFD numerical 3D calculations showed that solids flow rate increased with increasing hopper diameter to the 2.5th power. As hopper angle increased, flow pattern in hopper transformed from mass-flow to funnel-flow. CPFD could give the change of transition surface height with hopper structure.

关 键 词：计算颗粒流体力学 数值模拟 颗粒流 料仓结构 粉体 

分 类 号：TQ536[化学工程—煤化学工程]