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题名: A numerical study of the bubble induced pressure fluctuation in gas-fluidized beds
作者: Zhang, Yuli1, 2, 3;  Xiao, Rui1;  Ye, Mao2, 3;  Liu, Zhongmin2, 3
关键词: Bubble size ;  Pressure fluctuation ;  Fluidized bed ;  Euler-Euler model
刊名: POWDER TECHNOLOGY
发表日期: 2017-06-01
DOI: 10.1016/j.powtec.2016.08.59
卷: 314, 页:387-399
收录类别: SCI ;  ISTP
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Engineering, Chemical
研究领域[WOS]: Engineering
英文摘要: Pressure fluctuation analysis has been widely accepted as an efficient way for bubble size estimation in fluidized beds since the local bubble induced pressure fluctuation, which is believed to be a function of bubble size, can be separated away from the global pressure waves. The spectral data decomposition method developed by van der Schaaf et al. (2002) Van der Schaaf et al. (2002) has been widely used in this regard. However, it has been found in various experimental studies that the proportionality constant between the reference data (obtained via measurements by various techniques or predicted by well-established correlations) and the estimated bubble size differs significantly in different applications. In this work we try to understand the scattered proportionality constants via a numerical study based on the Euler-Euler two-fluid model. The simulation results indicate that the local bubble induced pressure fluctuation is affected not only by bubble size, but also by the lateral distance between the rising bubble and detecting point, bubble shape, bed diameter, and bubble coalescence. Without consideration of these factors, the spectral data decomposition method is subject to large deviation for bubble size estimation. (C) 2016 Elsevier B.V. All rights reserved.
关键词[WOS]: NONINTRUSIVE DETERMINATION ;  OPTICAL PROBE ;  SIZE ;  FLOW ;  HYDRODYNAMICS ;  POLYETHYLENE ;  PROPAGATION ;  SIMULATION ;  DYNAMICS ;  COLUMNS
语种: 英语
WOS记录号: WOS:000401880700037
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152280
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Southeast Univ, Sch Energy & Environm, Minist Educ, Key Lab Energy Thermal Convers & Control, Nanjing 210096, Jiangsu, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Engn Lab MTO, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, Yuli,Xiao, Rui,Ye, Mao,et al. A numerical study of the bubble induced pressure fluctuation in gas-fluidized beds[J]. POWDER TECHNOLOGY,2017,314:387-399.
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