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Article: Characterizing computer cooling fan noise

TitleCharacterizing computer cooling fan noise
Authors
Issue Date2003
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, 2003, v. 114 n. 6 I, p. 3189-3200 How to Cite?
AbstractComputer cooling fan noise is studied theoretically, focusing on the radiation from the interaction between rotor blades and motor struts. The source is decomposed into axial thrust, circumferential drag, and radial force. There is no sound-power coupling among the three components. The index of spatial spinning pressure mode plays the key role in noise radiation. The leading modes are the zeroth, or coincident, mode for thrust and the first mode for the drag and radial force. The effect of source noncompactness is quantified and found to be substantial only for higher-order radiation modes. The sound powers of the leading modes follow a sixth-power law, while the next high-order modes follow an eighth-power law. Quantitative analysis shows that the drag force can be equally noisy as the coincident thrust force. Based on an empirical aerodynamic model of rotor-strut interaction, it is found that the total sound power is more sensitive to the number of struts than rotor blades. Numerical examples are given to demonstrate how the struts can be optimized for typical cooling fan conditions. © 2003 Acoustical Society of America.
Persistent Identifierhttp://hdl.handle.net/10722/156707
ISSN
2015 Impact Factor: 1.572
2015 SCImago Journal Rankings: 0.938
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHuang, Len_US
dc.date.accessioned2012-08-08T08:43:37Z-
dc.date.available2012-08-08T08:43:37Z-
dc.date.issued2003en_US
dc.identifier.citationJournal Of The Acoustical Society Of America, 2003, v. 114 n. 6 I, p. 3189-3200en_US
dc.identifier.issn0001-4966en_US
dc.identifier.urihttp://hdl.handle.net/10722/156707-
dc.description.abstractComputer cooling fan noise is studied theoretically, focusing on the radiation from the interaction between rotor blades and motor struts. The source is decomposed into axial thrust, circumferential drag, and radial force. There is no sound-power coupling among the three components. The index of spatial spinning pressure mode plays the key role in noise radiation. The leading modes are the zeroth, or coincident, mode for thrust and the first mode for the drag and radial force. The effect of source noncompactness is quantified and found to be substantial only for higher-order radiation modes. The sound powers of the leading modes follow a sixth-power law, while the next high-order modes follow an eighth-power law. Quantitative analysis shows that the drag force can be equally noisy as the coincident thrust force. Based on an empirical aerodynamic model of rotor-strut interaction, it is found that the total sound power is more sensitive to the number of struts than rotor blades. Numerical examples are given to demonstrate how the struts can be optimized for typical cooling fan conditions. © 2003 Acoustical Society of America.en_US
dc.languageengen_US
dc.publisherAcoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.htmlen_US
dc.relation.ispartofJournal of the Acoustical Society of Americaen_US
dc.titleCharacterizing computer cooling fan noiseen_US
dc.typeArticleen_US
dc.identifier.emailHuang, L:lixi@hku.hken_US
dc.identifier.authorityHuang, L=rp00119en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1121/1.1624074en_US
dc.identifier.scopuseid_2-s2.0-0346847709en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0346847709&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume114en_US
dc.identifier.issue6 Ien_US
dc.identifier.spage3189en_US
dc.identifier.epage3200en_US
dc.identifier.isiWOS:000187425800024-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridHuang, L=7404735514en_US

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