Simulation of hydrodynamics in gas-solid bubbling fluidized bed with louver baffles in three dimensions

CORC > 过程工程研究所 > 中国科学院过程工程研究所 > 多相复杂系统国家重点实验室

	Simulation of hydrodynamics in gas-solid bubbling fluidized bed with louver baffles in three dimensions
	Yang, Shuai 1,2; Peng, Li 1,2; Liu, Wenming 1,2; Zhao, Hu1,2 ; Lv, Xiaolin 1,2; Li, Hongzhong 1; Zhu, Qingshan 1
刊名	POWDER TECHNOLOGY
	2016-08-01
卷号	296 期号:AUG 页码:37-44
关键词	Fluidization Louver baffles Hydrodynamics Simulation Bubbling fluidized beds
ISSN号	0032-5910
英文摘要	In this study, the flow characteristics of Geldart A particles in the bubbling fluidized bed with louver baffles were simulated by CFD method for the first time. A new drag model for bubbling fluidized bed with louver baffles was developed after our early work [Yang et al. Chem. Eng. J. 259 (2015) 338-347]. In this drag model, the baffled fluidized bed was treated as a series connection of freely bubbling fluidized beds with the louver baffle as the gas distributor. The hydrodynamics of each freely bubbling fluidized bed were simulated using the structure-based drag model with the modification of the bubble diameter equation to adapt the change of bubble size after passing each louver baffle. Through analyzing bubble diameters measured by double optical fiber probe, it was found that the averaged diameter of bubbles regenerated from baffles was nearly equal to the distance between two adjacent vanes in the louver baffle. By this method, the bubbling fluidization can be correctly predicted and the simulation results showed good agreements with the experimental data of the radial and axial solid volume fraction distributions. In the simulation results, it can be seen that the variation of axial solid volume fraction across the louver baffle was fluctuant, which was different from other types of baffles. Meanwhile, the lower particle concentration at the position of louver baffle indicates the particles back-mixing inhibited by louver baffles. The guiding effect of louver baffles on the gas and solid flow can be captured in the gas and solid velocity profiles as well. (C) 2015 Elsevier B.V. All rights reserved.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	CFD SIMULATION ; FCC PARTICLES ; REACTORS ; SYSTEMS ; PROBES
收录类别	SCI
语种	英语
WOS记录号	WOS:000377739800005
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/21150]
专题	过程工程研究所_多相复杂系统国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yang, Shuai,Peng, Li,Liu, Wenming,et al. Simulation of hydrodynamics in gas-solid bubbling fluidized bed with louver baffles in three dimensions[J]. POWDER TECHNOLOGY,2016,296(AUG):37-44.
APA	Yang, Shuai.,Peng, Li.,Liu, Wenming.,Zhao, Hu.,Lv, Xiaolin.,...&Zhu, Qingshan.(2016).Simulation of hydrodynamics in gas-solid bubbling fluidized bed with louver baffles in three dimensions.POWDER TECHNOLOGY,296(AUG),37-44.
MLA	Yang, Shuai,et al."Simulation of hydrodynamics in gas-solid bubbling fluidized bed with louver baffles in three dimensions".POWDER TECHNOLOGY 296.AUG(2016):37-44.