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Article: A computational study of the interaction noise from a small axial-flow fan

TitleA computational study of the interaction noise from a small axial-flow fan
Authors
Issue Date2007
PublisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html
Citation
Journal Of The Acoustical Society Of America, 2007, v. 122 n. 3, p. 1404-1415 How to Cite?
AbstractSmall axial-flow fans used for computer cooling and many other appliances feature a rotor driven by a downstream motor held by several cylindrical struts. This study focuses on the aerodynamic mechanism of rotor-strut interaction for an isolated fan. The three-dimensional, unsteady flow field is calculated using FLUENT®, and the sound radiation predicted by acoustic analogy is compared with measurement data. Striking differences are found between the pressure oscillations in various parts of the structural surfaces during an interaction event. The suction surface of the blade experiences a sudden increase in pressure when the blade trailing edge sweeps past a strut, while the process of pressure decrease on the pressure side of the blade is rather gradual during the interaction. The contribution of the latter towards the total thrust force on the structure is cancelled out significantly by that on the strut. In terms of the acoustic contributions from the rotor and strut, the upstream rotor dominates and this feature differs from the usual rotor-stator interaction acoustics in which the downstream part is responsible for most of the noise. It is therefore argued that the dominant interaction mechanism is potential flow in nature. © 2007 Acoustical Society of America.
Persistent Identifierhttp://hdl.handle.net/10722/57190
ISSN
2015 Impact Factor: 1.572
2015 SCImago Journal Rankings: 0.938
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLu, HZen_HK
dc.contributor.authorHuang, Len_HK
dc.contributor.authorSo, RMCen_HK
dc.contributor.authorWang, Jen_HK
dc.date.accessioned2010-04-12T01:29:02Z-
dc.date.available2010-04-12T01:29:02Z-
dc.date.issued2007en_HK
dc.identifier.citationJournal Of The Acoustical Society Of America, 2007, v. 122 n. 3, p. 1404-1415en_HK
dc.identifier.issn0001-4966en_HK
dc.identifier.urihttp://hdl.handle.net/10722/57190-
dc.description.abstractSmall axial-flow fans used for computer cooling and many other appliances feature a rotor driven by a downstream motor held by several cylindrical struts. This study focuses on the aerodynamic mechanism of rotor-strut interaction for an isolated fan. The three-dimensional, unsteady flow field is calculated using FLUENT®, and the sound radiation predicted by acoustic analogy is compared with measurement data. Striking differences are found between the pressure oscillations in various parts of the structural surfaces during an interaction event. The suction surface of the blade experiences a sudden increase in pressure when the blade trailing edge sweeps past a strut, while the process of pressure decrease on the pressure side of the blade is rather gradual during the interaction. The contribution of the latter towards the total thrust force on the structure is cancelled out significantly by that on the strut. In terms of the acoustic contributions from the rotor and strut, the upstream rotor dominates and this feature differs from the usual rotor-stator interaction acoustics in which the downstream part is responsible for most of the noise. It is therefore argued that the dominant interaction mechanism is potential flow in nature. © 2007 Acoustical Society of America.en_HK
dc.languageengen_HK
dc.publisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.htmlen_HK
dc.relation.ispartofJournal of the Acoustical Society of Americaen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subject.meshHousehold Articlesen_HK
dc.subject.meshNoiseen_HK
dc.subject.meshAcousticsen_HK
dc.subject.meshComputersen_HK
dc.subject.meshEquipment Designen_HK
dc.titleA computational study of the interaction noise from a small axial-flow fanen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0001-4966&volume=122&issue=3&spage=1404&epage=1415&date=2007&atitle=A+computational+study+of+the+interaction+noise+from+a+small+axial-flow+fanen_HK
dc.identifier.emailHuang, L:lixi@hku.hken_HK
dc.identifier.authorityHuang, L=rp00119en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1121/1.2764474en_HK
dc.identifier.pmid17927402-
dc.identifier.scopuseid_2-s2.0-35248823685en_HK
dc.identifier.hkuros145638-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-35248823685&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume122en_HK
dc.identifier.issue3en_HK
dc.identifier.spage1404en_HK
dc.identifier.epage1415en_HK
dc.identifier.isiWOS:000249321700010-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLu, HZ=7404843512en_HK
dc.identifier.scopusauthoridHuang, L=7404735514en_HK
dc.identifier.scopusauthoridSo, RMC=16489407100en_HK
dc.identifier.scopusauthoridWang, J=9639054400en_HK

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