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Modeling the hydrodynamics of downer reactors based on the meso-scale structure
Liu, Wenming1,2; Li, Hongzhong1; Zhu, Qingshan1,2
2017-06-01
发表期刊POWDER TECHNOLOGY
ISSN0032-5910
卷号314页码:367-376
摘要This work presents a new structure-based drag model for downer reactors combining with the computational fluid dynamics (CFD) method to systematically study the hydrodynamics of downer reactors. Previous studies are limited to simulate the radial performance in downers because of using the conventional drag model. Based on the new drag model, the hydrodynamics of downers in the radial and the axial direction are simulated. Meanwhile, the effect of clusters, which is the typical meso-scale structure, are investigated. It was found that, compared to risers, the drag force would not be influenced by the cluster diameter and voidage in downers heavily. The simulation results by the new structure-based drag model showed reasonable agreements with the experimental data in the radial and axial direction. The unique trends of downers were also obtained, e.g. the dense ring flow structure, axial velocity flow structure and pressure distribution. These results demonstrated that the new structure-based drag model could reflect the hydrodynamics of downer reactors and provide a good understanding on the physical mechanism of the gas-solid flow in downers. (C) 2016 Published by Elsevier B.V.
关键词Fluidization Downer Simulation Drag Hydrodynamics
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.powtec.2016.09.087
收录类别SCI ; ISTP
语种英语
关键词[WOS]CIRCULATING FLUIDIZED-BED ; GAS-SOLID FLOW ; HIGH-DENSITY ; DRAG MODEL ; EULERIAN SIMULATION ; CFD SIMULATION ; 2-FLUID MODEL ; CLUSTER ; RISER ; COEFFICIENT
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Natural Science Foundation of China(21325628) ; State Key Development Program for Basic Research of China (973 Program)(2015CB251402)
WOS记录号WOS:000401880700035
引用统计
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22523
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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Liu, Wenming,Li, Hongzhong,Zhu, Qingshan. Modeling the hydrodynamics of downer reactors based on the meso-scale structure[J]. POWDER TECHNOLOGY,2017,314:367-376.
APA Liu, Wenming,Li, Hongzhong,&Zhu, Qingshan.(2017).Modeling the hydrodynamics of downer reactors based on the meso-scale structure.POWDER TECHNOLOGY,314,367-376.
MLA Liu, Wenming,et al."Modeling the hydrodynamics of downer reactors based on the meso-scale structure".POWDER TECHNOLOGY 314(2017):367-376.
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