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An aeroacoustically driven thermoacoustic heat pump.
MedLine Citation:
PMID:  16018466     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The mean flow of gas in a pipe past a cavity can excite the resonant acoustic modes of the cavity--much like blowing across the top of a bottle. The periodic shedding of vortices from the leading edge of the mouth of the cavity feeds energy into the acoustic modes which, in turn, affect the shedding of the next vortex. This so-called aeroacoustic whistle can excite very high amplitude acoustic standing waves within a cavity defined by coaxial side branches closed at their ends. The amplitude of these standing waves can easily be 20% of the ambient pressure at optimal gas flow rates and ambient pressures within the main pipe. A standing wave thermoacoustic heat pump is a device which utilizes the in-phase pressure and displacement oscillations to pump heat across a porous medium thereby establishing, or maintaining, a temperature gradient. Experimental results of a combined system of aeroacoustic sound source and a simple thermoacoustic stack will be presented.
Authors:
W V Slaton; J C H Zeegers
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  117     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2005 Jun 
Date Detail:
Created Date:  2005-07-15     Completed Date:  2005-12-14     Revised Date:  2006-12-27    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3628-35     Citation Subset:  -    
Affiliation:
Department of Physics and Astronomy, The University of Central Arkansas, 201 Donaghey Avenue, Conway, Arkansas 72035-0001, USA.
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