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
Sound propagation around off-shore wind turbines
KTH, Superseded Departments, Civil and Architectural Engineering.
2003 (English)Licentiate thesis, monograph (Other scientific)
Abstract [en]

Low-frequency, long-range sound propagation over a seasurface has been calculated using a wide-angel Cranck-NicholsonParabolic Equation method. The model is developed toinvestigate noise from off-shore wind turbines. Thecalculations are made using normal meteorological conditions ofthe Baltic Sea. Special consideration has been made to a windphenomenon called low level jet with strong winds on rather lowaltitude.

The effects of water waves on sound propagation have beenincorporated in the ground boundary condition using a bossmodel. This way of including roughness in sound propagationmodels is valid for water wave heights that are small comparedto the wave length of the sound. Nevertheless, since only lowfrequency sound is considered, waves up to the mean wave heightof the Baltic Sea can be included in this manner.

The calculation model has been tested against benchmarkcases and agrees well with measurements. The calculations showthat channelling of sound occurs at downwind conditions andthat the sound propagation tends towards cylindrical spreading.The effects of the water waves are found to be fairlysmall.

Keywords:wind turbine noise, off-shore wind power,long-range sound propagation, parabolic equation, scattering,water waves

Place, publisher, year, edition, pages
Stockholm: Byggvetenskap , 2003. , 87 p.
Series
Meddelande. Inst. för byggnadsteknik, ISSN 0346-5918 ; 192
Keyword [en]
wind turbine noise, off-shore wind powe, long-rage sound propagation, parabolic equation, scattering, water waves
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:kth:diva-1580OAI: oai:DiVA.org:kth-1580DiVA: diva2:7506
Note
QC 20110617Available from: 2003-08-04 Created: 2003-08-04 Last updated: 2011-06-16Bibliographically approved

Open Access in DiVA

fulltext(18481 kB)325 downloads
File information
File name FULLTEXT02.pdfFile size 18481 kBChecksum SHA-512
9ab1e524a8e6be7ec4d283495037d4e1fc1e1daab5b3309f144778261918a783f99899f4495696bf93cb526278cebb82797c90ee7aaa75a2a07cdc03e2a12a00
Type fulltextMimetype application/pdf

By organisation
Civil and Architectural Engineering
Building Technologies

Search outside of DiVA

GoogleGoogle Scholar
Total: 1085 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

urn-nbn

Altmetric score

urn-nbn
Total: 750 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