化工进展2018，Vol.37Issue(1)：14-22,9.DOI:10.16085/j.issn.1000-6613.2017-0772
导向管直径对喷动床流动特性影响的计算颗粒流体力学数值模拟
Simulation for effects of draft tube diameter on flow characteristics in a spouted bed using computational particle fluid dynamics (CPFD) method
摘要
Abstract
The spouted bed with draft tube is a kind of improved structure of spouted bed,which can improve the regularity and stability of spouting process by blocking the gas-solid contact between spray area and annulus. This paper carried out the numerical simulation for a 150mm diameter spouted bed using computational particle fluid dynamics(CPFD)method. The effects of draft tube diameter on flow characteristics was investigated from the dead zone of the annulus,particle velocity distribution and solid circulating rate. Results show that the draft tube reduced bed dead zone and solid circulating rate. For this spouted bed structure and operation parameters,only 40—60mm draft tube diameter can ensure the bed has a good spouting state,and 50—55mm draft tube is most appropriate. For a spouted bed with similar structure,the draft tube diameter should be selected as 1.25—1.375 times as the spray area diameter of spouting without draft tube.关键词
喷动床/数值模拟/导向管/颗粒流/颗粒物料Key words
spouted bed/numerical simulation/draft tube/granular flow/granular materials分类
化学化工引用本文复制引用
张立栋,王子嘉,李少华,王擎,秦宏..导向管直径对喷动床流动特性影响的计算颗粒流体力学数值模拟[J].化工进展,2018,37(1):14-22,9.基金项目
教育部长江学者和创新团队发展计划(IRT-17R19)、吉林省自然科学基金(20150101033JC)、吉林市科技计划(201464044)及吉教科合字2015-237项目. （IRT-17R19）
