Change search
ReferencesLink to record
Permanent link

Direct link
Acoustic source identification of an axial fan in a duct considering the rotation effect
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.
2016 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 140, no 1, 145-156 p.Article in journal (Refereed) Published
Abstract [en]

For developing the quiet axial fans, the spatial distribution of acoustic source parameters over the source plane provides essential information. In this study, the previously suggested source identification technique by authors is newly applied to an axial fan. To obtain the acoustic source parameters in a duct, one should overcome many technical difficulties related with: the turbulent flow, high order modes, rotating sources, inverse estimation. Measurements are conducted with several arrays of flush mounted microphones deployed on the periphery of the duct wall. A reference trigger signal obtained from the rotating blade is used to suppress the effect of turbulent flow in the measured pressure spectra with a reduction of about 25 dB in the present work. The maximum error between measurement and estimation is generally <-20 dB in the measurement plane in the very vicinity to the source. The visualized source images clearly indicate the locations and the strengths of main contributors to the radiated sound, e.g., for the inlet of the axial fan, the tip clearance between fan blades and shroud wall.

Place, publisher, year, edition, pages
2016. Vol. 140, no 1, 145-156 p.
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-192976DOI: 10.1121/1.4955068ISI: 000382406500038ScopusID: 2-s2.0-84978396789OAI: diva2:1001739

QC 20160930

Available from: 2016-09-30 Created: 2016-09-23 Last updated: 2016-09-30Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Bodén, Hans
By organisation
Marcus Wallenberg Laboratory MWL
In the same journal
Journal of the Acoustical Society of America
Fluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

ReferencesLink to record
Permanent link

Direct link