Characteristics of Pressure Signals in a Bubble Column by Wavelet Packet Transform

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All experiments of pressure fluctuations were carried out in a bubble column with a moderately large column of 0.376 in ID. The recently developed technique of wavelet packet transform based on localized wavelet functions is applicable to analysis of the fluctuating signals. The time series of pressure fluctuation signals have been analyzed by means of wavelet packet transform components, decomposition through best basis algorithm and time-frequency representation. By resorting to this technique, the objects in bubbly flow regime have fine scales and frequencies than ones in chum-turbulent flow regime. Thus, this wavelet packet transform method enables us to obtain the frequency content of local complex flow behaviors in a bubble column.
Publisher
Korean Institute of Chemical Engineers
Issue Date
2003-01
Language
English
Article Type
Article
Keywords

FLUIDIZED-BEDS; FLUCTUATIONS

Citation

KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.20, no.1, pp.128 - 132

ISSN
0256-1115
DOI
10.1007/BF02697197
URI
http://hdl.handle.net/10203/78805
Appears in Collection
CBE-Journal Papers(저널논문)
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