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CFD simulation of smooth and T-abrupt exits in circulating fluidized bed risers

文献类型：期刊论文

作者Wu, Xuezhi1,2; Jiang, Fan1; Xu, Xiang1; Xiao, Yunhan1
刊名PARTICUOLOGY
出版日期2010-08-01
卷号8期号:4页码:343-350
关键词T-abrupt exit Smooth exit Gas-solid flow CFB EMMS drag force model
英文摘要Gas-solid flow in circulating fluidized bed (CFB) risers depends not only on operating conditions but also on exit configurations. Few studies investigated the effects of exit configurations on flow structure using computational fluid dynamics (CFD). This paper provides a 2D two-fluid model to simulate a cold bench-scale square cross-section riser with smooth and T-abrupt exits. The drag force between the gas and solid phases plays an important role in CFD. Since the drag force model based on homogeneous two-phase flow, such as the Wen-Yu correlation, could not capture the heterogeneous structures in gas-solid flow, the structure-dependent energy-minimization multi-scale (EMMS) drag force model (Wang, Ge, & Li, 2008), applicable for Geldart B particles (sand), was integrated into the two-fluid model. The calculated axial solids hold-up profiles were respectively exponential curve for smooth exit and C-shaped curve for T-abrupt exit, both consistent with experimental data. This study once again proves the key role of drag force in CFD simulation and also shows the validity of CFD simulation (two-fluid model) to describe exit effects on gas-solid flow in CFB risers. (C) 2010 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
WOS标题词Science & Technology ; Technology
类目[WOS]Engineering, Chemical ; Materials Science, Multidisciplinary
研究领域[WOS]Engineering ; Materials Science
关键词[WOS]SOLID 2-PHASE FLOW ; KINETIC-THEORY ; HYDRODYNAMICS ; MODEL ; GEOMETRY ; VOIDAGE ; DRAG
收录类别SCI
语种英语
WOS记录号WOS:000282354600006
公开日期2015-12-22
源URL[http://ir.etp.ac.cn/handle/311046/106477]  
专题工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位1.Chinese Acad Sci, Inst Engn Thermophys, Key Lab Adv Energy & Power, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Xuezhi,Jiang, Fan,Xu, Xiang,et al. CFD simulation of smooth and T-abrupt exits in circulating fluidized bed risers[J]. PARTICUOLOGY,2010,8(4):343-350.
APA Wu, Xuezhi,Jiang, Fan,Xu, Xiang,&Xiao, Yunhan.(2010).CFD simulation of smooth and T-abrupt exits in circulating fluidized bed risers.PARTICUOLOGY,8(4),343-350.
MLA Wu, Xuezhi,et al."CFD simulation of smooth and T-abrupt exits in circulating fluidized bed risers".PARTICUOLOGY 8.4(2010):343-350.

入库方式： OAI收割

来源：工程热物理研究所

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