cfdsimulationoftheeffectsofasuspensionsectiononthehydrodynamicsofacirculatingfluidizedbed

	cfdsimulationoftheeffectsofasuspensionsectiononthehydrodynamicsofacirculatingfluidizedbed
	Cenfan Liu 1; Nan Zhang1 ; Wei Wang1
刊名	中国颗粒学报英文版
	2019
卷号	000 期号:002 页码:1
ISSN号	1674-2001
英文摘要	Gas-solid two-phase flow in a circulating fluidized bed (CFB) is affected by operating conditions (e.g., superficial gas velocity, solids inventory), material properties and geometric factors, such as the entry and exit configuration. In particular, the suspension section, which is located between the riser bottom and the solids recycle inlet, affects the hydrodynamics in the riser significantly. However, the suspension section has received less attention compared with other geometric factors. Most computational fluid dynamics (CFD) simulations, especially two-dimensional simulations do not take this factor into account. We performed three-dimensional, full-loop CFD simulations with a drag coefficient that was determined by the energy-minimization multi-scale model, and investigated the flow behavior of two CFBs with different suspension-section lengths. The simulation resuits revealed that the axial profiles of voidage in the riser with a longer suspension section are more likely S-shaped, whereas those with shorter suspension sections decay exponentially. The dependences of solids flux on solids inventory differ in the two CFBs. A shorter suspension section may result in a smooth transition from dilute to dense transport without intermediate accumulative choki-ng, whereas a Ion ger suspe nsion section may lead to a choking transition. These simulation results are qualitatively consistent with the flow behaviors described in literature.
语种	英语
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/34412]
专题	中国科学院过程工程研究所
作者单位	1.中国科学院过程工程研究所 2.China Special Equipment Inspection and Research Institute 3.中国科学院大学
推荐引用方式 GB/T 7714	Cenfan Liu,Nan Zhang,Wei Wang. cfdsimulationoftheeffectsofasuspensionsectiononthehydrodynamicsofacirculatingfluidizedbed[J]. 中国颗粒学报英文版,2019,000(002):1.
APA	Cenfan Liu,Nan Zhang,&Wei Wang.(2019).cfdsimulationoftheeffectsofasuspensionsectiononthehydrodynamicsofacirculatingfluidizedbed.中国颗粒学报英文版,000(002),1.
MLA	Cenfan Liu,et al."cfdsimulationoftheeffectsofasuspensionsectiononthehydrodynamicsofacirculatingfluidizedbed".中国颗粒学报英文版 000.002(2019):1.