Article: Acoustic analysis of a computer cooling fan
| Title | Acoustic analysis of a computer cooling fan |
|---|---|
| Authors | Huang, L1 Wang, J1 |
| Issue Date | 2005 |
| Publisher | Acoustical 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, 2005, v. 118 n. 4, p. 2190-2200 [How to Cite?] DOI: http://dx.doi.org/10.1121/1.2010367 |
| Abstract | Noise 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. |
| ISSN | 0001-4966 2011 Impact Factor: 1.55 2011 SCImago Journal Rankings: 0.075 |
| DOI | http://dx.doi.org/10.1121/1.2010367 |
| ISI Accession Number ID | WOS:000232712700013 |
| References | References in Scopus |
| dc.contributor.author | Huang, L |
|---|---|
| dc.contributor.author | Wang, J |
| dc.date.accessioned | 2012-08-08T08:43:58Z |
| dc.date.available | 2012-08-08T08:43:58Z |
| dc.date.issued | 2005 |
| dc.description.abstract | Noise 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.nature | Link_to_subscribed_fulltext |
| dc.identifier.citation | Journal 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.doi | http://dx.doi.org/10.1121/1.2010367 |
| dc.identifier.epage | 2200 |
| dc.identifier.isi | WOS:000232712700013 |
| dc.identifier.issn | 0001-4966 2011 Impact Factor: 1.55 2011 SCImago Journal Rankings: 0.075 |
| dc.identifier.issue | 4 |
| dc.identifier.scopus | eid_2-s2.0-26844546126 |
| dc.identifier.spage | 2190 |
| dc.identifier.uri | http://hdl.handle.net/10722/156787 |
| dc.identifier.volume | 118 |
| dc.language | eng |
| dc.publisher | Acoustical Society of America. The Journal's web site is located at http://asa.aip.org/jasa.html |
| dc.publisher.place | United States |
| dc.relation.ispartof | Journal of the Acoustical Society of America |
| dc.relation.references | References in Scopus |
| dc.title | Acoustic analysis of a computer cooling fan |
| dc.type | Article |
Author Affiliations
- Hong Kong Polytechnic University