Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The effect of high level multi-tone excitation on the acoustic properties of perforates and liner samples
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-8474-8563
2012 (English)In: 18th AIAA/CEAS Aeroacoustics Conf. (33rd AIAA Aeroacoustics Conf.), American Institute of Aeronautics and Astronautics, 2012Conference paper, Published paper (Refereed)
Abstract [en]

This paper discusses the effect of high level multi-tone acoustic excitation on the acoustic properties of perforates and liner samples. It is based on a large experimental study of the nonlinear properties of these types of samples without mean grazing or bias flow. It is known from previous studies that high level acoustic excitation at one frequency will change the acoustic impedance of perforates at other frequencies, thereby changing the boundary condition seen by the acoustic waves. This effect could be used to change the impedance boundary conditions and for instance increase the absorption. It could obviously also pose a problem for the correct modelling of sound transmission through ducts lined with such impedance surfaces. First a quasi-stationary model for the acoustic properties of the perforate is discussed and the results are compared to experimental data. The effect of the combination of frequency components in the excitation signal is studied to find out if it matters if we are using tones which are harmonically related or not. The effect the phase of the frequency components is studied using both the model and experimental data. It is also discussed if a parameter controlling the impedance can be found for an arbitrary combination of tones with different frequencies.

Place, publisher, year, edition, pages
American Institute of Aeronautics and Astronautics, 2012.
Keyword [en]
Acoustic excitation, Different frequency, Experimental datum, Experimental studies, Frequency components, Impedance boundary conditions, Nonlinear properties, Sound transmission, Acoustic impedance, Acoustic wave transmission, Boundary conditions, Aeroacoustics
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-129811DOI: 10.2514/6.2012-2151Scopus ID: 2-s2.0-84880608710ISBN: 978-160086932-7 (print)OAI: oai:DiVA.org:kth-129811DiVA: diva2:653903
Conference
18th AIAA/CEAS Aeroacoustics Conference 2012 (33rd AIAA Aeroacoustics Conference),4 June 2012 through 6 June 2012
Note

QC20131007

Available from: 2013-10-07 Created: 2013-10-04 Last updated: 2014-11-17Bibliographically approved

Open Access in DiVA

fulltext(437 kB)118 downloads
File information
File name FULLTEXT01.pdfFile size 437 kBChecksum SHA-512
385a7951e7e4b2ed0a3d9458454ea8167e84a41f1892aa576796cfeca581d5e2fd6ec5cffe0e78fca8019f3b73809d1b3ef3b9515e7d1c247289b1a64496be05
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records BETA

Bodén, Hans

Search in DiVA

By author/editor
Bodén, Hans
By organisation
Marcus Wallenberg Laboratory MWLLinné Flow Center, FLOW
Fluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar
Total: 118 downloads
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

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 60 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf