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Scale resolution of fiber optical signals in circulating fluidized bed
Wu, Shan1,2; Meng, Fanyong2; He, Yaqun1

The fluidized bed signals can be decomposed into micro-scale, meso-scale and macro-scale by means of multi-resolution analysis, while how to perform the scale resolution accurately and convincingly still lacks appropriate criteria. In this study, the dual-channel fiber optical signals in the circulating fluidized bed were utilized to investigate the characteristic differences of correlation coefficients and time-delay between three scales. It's found that for two adjacent measurement signals there's good correlation and obvious time-delay at the meso-scale, characterizing the dynamic evolution of cluster structure, while high correlation and no time-delay at the macro-scale (apparatus scale), and no correlation at the micro-scale (discrete particles). Based on such analysis, the correlation time-delay function (CTF) f(tau r) was put forward as a scale resolution criterion to examine the characteristics of both correlation and time-delay between a pair of signals. Through analyzing the changes of f(tau r) with the level of decomposition signals, the raw fiber optical signals obtained from a pilot scale circulating fluidized bed (CFB) riser were effectively resolved into three scales. (C) 2018 Elsevier Ltd. All rights reserved.

KeywordWavelet Analysis Fiber Optical Signals Scale Resolution Fluidization Correlation Time-delay Function
WOS HeadingsScience & Technology ; Technology
Indexed BySCI
WOS KeywordGroup-b Particles ; Recurrence Quantification Analysis ; Multiresolution Analysis ; Cluster Characteristics ; Pressure-fluctuations ; Multiscale Methodology ; Complex-systems ; Riser ; Flow ; Behavior
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
Funding OrganizationNational Nature Science Foundation of China(21376245 ; Strategic Priority Research Program of Chinese Academy of Sciences(XDA07080104) ; Youth Innovation Promotion Association CAS(2014039) ; 21106158 ; 91334204)
WOS IDWOS:000429027400013
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.China Univ Min & Technol, Sch Chem Engn & Technol, Xuzhou 221116, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Wu, Shan,Meng, Fanyong,He, Yaqun. Scale resolution of fiber optical signals in circulating fluidized bed[J]. CHEMICAL ENGINEERING SCIENCE,2018,182:162-170.
APA Wu, Shan,Meng, Fanyong,&He, Yaqun.(2018).Scale resolution of fiber optical signals in circulating fluidized bed.CHEMICAL ENGINEERING SCIENCE,182,162-170.
MLA Wu, Shan,et al."Scale resolution of fiber optical signals in circulating fluidized bed".CHEMICAL ENGINEERING SCIENCE 182(2018):162-170.
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