Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/77866
Type: Artigo de periódico
Title: Time series analysis of pressure fluctuation in gas-solid fluidized beds
Author: Felipe, CAS
Rocha, SCS
Abstract: The purpose of the present work was to study the differentiation of states of typical fluidization (single bubble, multiple bubble and slugging) in a gas-solid fluidized bed, using spectral analysis of pressure fluctuation time series. The effects of the method of measuring (differential and absolute) pressure fluctuations and the axial position of the probes in the fluidization column on the identification of each of the regimes studied were evaluated. Fast Fourier Transform (FFT) was the mathematic tool used to analysing the data of pressure fluctuations, which expresses the behavior of a time series in the frequency domain. Results indicated that the plenum chamber was a place for reliable measurement and that care should be taken in measurement in the dense phase. The method allowed fluid dynamic regimes to be differentiated by their dominant frequency characteristics.
Subject: pressure fluctuation
fluidized beds
Fast Fourier Transform
spectral analysis
time series
Country: Brasil
Editor: Brazilian Soc Chemical Eng
Rights: aberto
Identifier DOI: 10.1590/S0104-66322004000300014
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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