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Conference Paper: Quantification and control of noise sources in a small axial-flow fan

TitleQuantification and control of noise sources in a small axial-flow fan
Authors
Issue Date2006
PublisherInstitute of Noise Control Engineering. The Journal's web site is located at http://www.inceusa.org/publications/ncej
Citation
Noise Control Engineering Journal, 2006, v. 54 n. 1, p. 27-32 How to Cite?
AbstractRotor-strut interaction force is identified as the main tonal noise source of a typical computer cooling fan for which obvious design faults have been corrected. It is hypothesized that the interaction force arising from one encounter between rotor blade and strut can be approximated by that in a special design in which the number of rotor blades is equal to the number of struts. In such a design, the on-axis radiation of noise gives the exact signature of the time derivative of the interaction force which can be experimentally quantified and further used to predict noise radiation by a practical design in which the number of struts is different from the number of blades. This hypothesis is applied to a sample fan of 9 cm in diameter with 7 rotor blades and 4 struts. Analysis of the 4-strut fan noise agrees very well with the prediction based on the force signature experimentally obtained from the corresponding 7-strut design. Measurement also shows that a potential of around 10 dB sound power reduction can be realized when the usual design of cooling fans are corrected for its inlet flow conditions and unequal strut sizes. © Institute of Noise Control Engineering.
Persistent Identifierhttp://hdl.handle.net/10722/158962
ISSN
2015 Impact Factor: 0.313
2015 SCImago Journal Rankings: 0.498
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, Jen_US
dc.contributor.authorHuang, Len_US
dc.date.accessioned2012-08-08T09:04:48Z-
dc.date.available2012-08-08T09:04:48Z-
dc.date.issued2006en_US
dc.identifier.citationNoise Control Engineering Journal, 2006, v. 54 n. 1, p. 27-32en_US
dc.identifier.issn0736-2501en_US
dc.identifier.urihttp://hdl.handle.net/10722/158962-
dc.description.abstractRotor-strut interaction force is identified as the main tonal noise source of a typical computer cooling fan for which obvious design faults have been corrected. It is hypothesized that the interaction force arising from one encounter between rotor blade and strut can be approximated by that in a special design in which the number of rotor blades is equal to the number of struts. In such a design, the on-axis radiation of noise gives the exact signature of the time derivative of the interaction force which can be experimentally quantified and further used to predict noise radiation by a practical design in which the number of struts is different from the number of blades. This hypothesis is applied to a sample fan of 9 cm in diameter with 7 rotor blades and 4 struts. Analysis of the 4-strut fan noise agrees very well with the prediction based on the force signature experimentally obtained from the corresponding 7-strut design. Measurement also shows that a potential of around 10 dB sound power reduction can be realized when the usual design of cooling fans are corrected for its inlet flow conditions and unequal strut sizes. © Institute of Noise Control Engineering.en_US
dc.languageengen_US
dc.publisherInstitute of Noise Control Engineering. The Journal's web site is located at http://www.inceusa.org/publications/ncejen_US
dc.relation.ispartofNoise Control Engineering Journalen_US
dc.titleQuantification and control of noise sources in a small axial-flow fanen_US
dc.typeConference_Paperen_US
dc.identifier.emailHuang, L:lixi@hku.hken_US
dc.identifier.authorityHuang, L=rp00119en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.3397/1.2888776en_US
dc.identifier.scopuseid_2-s2.0-33745468296en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33745468296&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume54en_US
dc.identifier.issue1en_US
dc.identifier.spage27en_US
dc.identifier.epage32en_US
dc.identifier.isiWOS:000237957600005-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridWang, J=9639054400en_US
dc.identifier.scopusauthoridHuang, L=7404735514en_US

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