Numerical comparison of thermoacoustic couples with modified stack plate edges

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dc.contributor.authorZoontjens, L.
dc.contributor.authorHoward, C.
dc.contributor.authorZander, A.
dc.contributor.authorCazzolato, B.
dc.date.issued2008
dc.description.abstractIt has been demonstrated that the bulk of time-averaged heat transfer between the oscillating fluid and a thermoacoustic couple is concentrated towards the edges of the stack plate. Previous numerical studies which have considered thermoacoustic couples of finite thickness have used a rectangular form for the plate edge. In practice however, current manufacturing practices allow for a variety of stack edges which may improve the efficiency of heat transfer and/or reduce entropic losses. In this numerical study, the performance of a thermoacoustic couple is investigated at selected drive ratios and using a variety of stack plate edge profiles. Results indicate that stack profiles with enlarged and blunter shapes improve the rate of heat transfer at low drive ratios but retard the rate of heat transfer at higher drive ratios due to increased residence time of the fluid in contact with the stack plate. The improvement in COP through minimisation of acoustic streaming on the inside face of the stack, and increased effective cooling power by greater retention of stack thickness at the plate extremities, leads to recommendation of the Rounded edge shape profile for thermoacoustic stack plates in practical devices. © 2008 Elsevier Ltd. All rights reserved.
dc.description.statementofresponsibilityL. Zoontjens, C.Q. Howard, A.C. Zander, B.S. Cazzolato
dc.identifier.citationInternational Journal of Heat and Mass Transfer, 2008; 51(19-20):4829-4840
dc.identifier.doi10.1016/j.ijheatmasstransfer.2008.02.037
dc.identifier.issn0017-9310
dc.identifier.orcidHoward, C. [0000-0002-7677-5318]
dc.identifier.orcidZander, A. [0000-0003-4099-8146]
dc.identifier.orcidCazzolato, B. [0000-0003-2308-799X]
dc.identifier.urihttp://hdl.handle.net/2440/52253
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.source.urihttps://doi.org/10.1016/j.ijheatmasstransfer.2008.02.037
dc.subjectThermoacoustics
dc.subjectHeat
dc.subjectSound
dc.subjectThermoacoustic couples
dc.subjectHeat exchangers
dc.subjectAcoustic streaming
dc.titleNumerical comparison of thermoacoustic couples with modified stack plate edges
dc.typeJournal article
pubs.publication-statusPublished

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