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Article: Acoustic analysis of a computer cooling fan
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TitleAcoustic analysis of a computer cooling fan
 
AuthorsHuang, L1
Wang, J1
 
Issue Date2005
 
PublisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html
 
CitationJournal Of The Acoustical Society Of America, 2005, v. 118 n. 4, p. 2190-2200 [How to Cite?]
DOI: http://dx.doi.org/10.1121/1.2010367
 
AbstractNoise radiated by a typical computer cooling fan is investigated experimentally and analyzed within the framework of rotor-stator interaction noise using point source formulation. The fan is 9 cm in rotor casing diameter and its design speed is 3000 rpm. The main noise sources are found and quantified; they are (a) the inlet flow distortion caused by the sharp edges of the incomplete bellmouth due to the square outer framework, (b) the interaction of rotor blades with the downstream struts which hold the motor, and (c) the extra size of one strut carrying electrical wiring. Methods are devised to extract the rotor-strut interaction noise, (b) and (c), radiated by the component forces of drag and thrust at the leading and higher order spinning pressure modes, as well as the leading edge noise generated by (a). By re-installing the original fan rotor in various casings, the noises radiated by the three features of the original fan are separated, and details of the directivity are interpreted. It is found that the inlet flow distortion and the unequal set of four struts make about the same amount of noise. Their corrections show a potential of around 10-dB sound power reduction. © 2005 Acoustical Society of America.
 
ISSN0001-4966
2012 Impact Factor: 1.646
2012 SCImago Journal Rankings: 0.716
 
DOIhttp://dx.doi.org/10.1121/1.2010367
 
ISI Accession Number IDWOS:000232712700013
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorHuang, L
 
dc.contributor.authorWang, J
 
dc.date.accessioned2012-08-08T08:43:58Z
 
dc.date.available2012-08-08T08:43:58Z
 
dc.date.issued2005
 
dc.description.abstractNoise radiated by a typical computer cooling fan is investigated experimentally and analyzed within the framework of rotor-stator interaction noise using point source formulation. The fan is 9 cm in rotor casing diameter and its design speed is 3000 rpm. The main noise sources are found and quantified; they are (a) the inlet flow distortion caused by the sharp edges of the incomplete bellmouth due to the square outer framework, (b) the interaction of rotor blades with the downstream struts which hold the motor, and (c) the extra size of one strut carrying electrical wiring. Methods are devised to extract the rotor-strut interaction noise, (b) and (c), radiated by the component forces of drag and thrust at the leading and higher order spinning pressure modes, as well as the leading edge noise generated by (a). By re-installing the original fan rotor in various casings, the noises radiated by the three features of the original fan are separated, and details of the directivity are interpreted. It is found that the inlet flow distortion and the unequal set of four struts make about the same amount of noise. Their corrections show a potential of around 10-dB sound power reduction. © 2005 Acoustical Society of America.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationJournal Of The Acoustical Society Of America, 2005, v. 118 n. 4, p. 2190-2200 [How to Cite?]
DOI: http://dx.doi.org/10.1121/1.2010367
 
dc.identifier.doihttp://dx.doi.org/10.1121/1.2010367
 
dc.identifier.epage2200
 
dc.identifier.isiWOS:000232712700013
 
dc.identifier.issn0001-4966
2012 Impact Factor: 1.646
2012 SCImago Journal Rankings: 0.716
 
dc.identifier.issue4
 
dc.identifier.scopuseid_2-s2.0-26844546126
 
dc.identifier.spage2190
 
dc.identifier.urihttp://hdl.handle.net/10722/156787
 
dc.identifier.volume118
 
dc.languageeng
 
dc.publisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html
 
dc.publisher.placeUnited States
 
dc.relation.ispartofJournal of the Acoustical Society of America
 
dc.relation.referencesReferences in Scopus
 
dc.titleAcoustic analysis of a computer cooling fan
 
dc.typeArticle
 
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Author Affiliations
  1. Hong Kong Polytechnic University