Analysis of Pressure Fluctuations in Fluidized Beds

dc.contributor.author Falkowski, David
dc.contributor.author Brown, Robert
dc.contributor.department Mechanical Engineering
dc.date 2018-02-17T00:30:44.000
dc.date.accessioned 2020-06-30T06:03:29Z
dc.date.available 2020-06-30T06:03:29Z
dc.date.copyright Thu Jan 01 00:00:00 UTC 2004
dc.date.issued 2004-01-01
dc.description.abstract <p>Pressure fluctuations were measured in a fluidized bed and evaluated in the frequency domain. The objective of this research was to determine the effect of bed parameters on the power spectra from the corresponding pressure fluctuations. The motivation for this work is to develop pressure fluctuations as a diagnostic tool for fluidized-bed reactors and combustors. Pressure fluctuation data for a range of bed heights, fluidization velocities, particle sizes, particle densities, and bed temperatures were taken to determine the effect of these parameters on the power spectrum. The dominant frequency was a function of the height of the fluidized bed. Secondary peaks were not influenced by the height of the bed, although they did depend on the position of the probe in the bed. Peaks in power spectra were observed to shift in frequency as the gas superficial velocity through the bed was changed. Powders of different classification had distinctive power spectra. Group A powders behaved like first-order linear systems; group B powders showed similarities to second-order linear systems; and group D powders exhibited harmonic behavior in their power spectra. When pressure fluctuations were measured over a temperature range from ambient to above 500 °C, power spectra varied little when the ratio of the superficial velocity to the minimum fluidization velocity was held relatively constant.</p>
dc.description.comments <p>Reprinted with permission from Ind. Eng. Chem. Res., 2004, 43 (18), pp 5721–5729. Copyright 2004 American Chemical Society.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/me_pubs/156/
dc.identifier.articleid 1154
dc.identifier.contextkey 7572538
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath me_pubs/156
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/55006
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/me_pubs/156/0-2004_Brown_AnalysisPressure_License.pdf|||Fri Jan 14 20:43:34 UTC 2022
dc.source.bitstream archive/lib.dr.iastate.edu/me_pubs/156/2004_Brown_AnalysisPressure.pdf|||Fri Jan 14 20:43:36 UTC 2022
dc.source.uri 10.1021/ie030684u
dc.subject.disciplines Acoustics, Dynamics, and Controls
dc.subject.disciplines Complex Fluids
dc.subject.disciplines Membrane Science
dc.subject.disciplines Other Mechanical Engineering
dc.title Analysis of Pressure Fluctuations in Fluidized Beds
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 06f45e8f-14d0-42f9-90df-c902e3049987
relation.isOrgUnitOfPublication 6d38ab0f-8cc2-4ad3-90b1-67a60c5a6f59
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