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Simulation of hydrodynamics in gas-solid bubbling fluidized bed with louver baffles in three dimensions
Yang, Shuai1,2; Peng, Li1,2; Liu, Wenming1,2; Zhao, Hu1,2; Lv, Xiaolin1,2; Li, Hongzhong1; Zhu, Qingshan1
2016-08-01
发表期刊POWDER TECHNOLOGY
ISSN0032-5910
卷号296期号:AUG页码:37-44
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.
关键词Fluidization Louver Baffles Hydrodynamics Simulation Bubbling Fluidized Beds
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.powtec.2015.09.026
收录类别SCI
语种英语
关键词[WOS]CFD SIMULATION ; FCC PARTICLES ; REACTORS ; SYSTEMS ; PROBES
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者State Key Development Program for Basic Research of China (973 Program)(2015CB251402) ; National Natural Science Foundation of China(21325628 ; 91334108)
WOS记录号WOS:000377739800005
引用统计
被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/21150
专题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
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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.
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