Assessment of sound propagation modelling from a wind turbine site at sea
2009 (English)In: 16th International Congress on Sound and Vibration 2009, ICSV 2009, 2009, 896-903 p.Conference paper (Refereed)
We present results from numerical modelling of sound propagation from Utgrunden lighthouse in Kalmarsund to a receiver at Hammarby on the island Ö land east of Sweden in the Baltic. The propagation distances from source to shore and from shore to receiver are ca 9 km and 0.7 km, respectively. Our purpose is to assess prediction of atmospheric sound propagation by methods that use detailed knowledge of the local geometry and meteorology, by comparing model predictions of the transmission loss with experimental data. The experimental data, collected several times daily during a one-week campaign in June 2005, consist of (i) data on the transmission loss of narrow band signals from controlled sources with frequencies 80 Hz, 200 Hz and 400 Hz, (ii) atmospheric parameters as function of height from radio-soundings and balloon-tracking at the receiver location and (iii) atmospheric parameters from sensors mounted on a meteorological mast at the source location. Model-predicted soundfields were computed once per hour during the one-week period, with a windfield composed of a laminar field determined from data at the receiver, superimposed by a turbulent field determined by data from the meteorological mast. Comparisons of the experimentally observed transmission loss with predictions by the Green's Function Parabolic Equation (GFPE) method by Gilbert and Di are presented. A reasonably good fit of the model predicted transmission loss as function of time to experimental data at all frequencies is observed.
Place, publisher, year, edition, pages
2009. 896-903 p.
Atmospheric parameters, Controlled source, Function of time, Local geometry, Model prediction, Narrowband signal, Parabolic Equations, Propagation distances, Receiver location, Sound propagation, Source location, Transmission loss, Turbulent fields, Acoustic wave propagation, Forecasting, Partial differential equations, Wave transmission
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-152035ScopusID: 2-s2.0-84871454024ISBN: 978-161567736-8OAI: oai:DiVA.org:kth-152035DiVA: diva2:749278
16th International Congress on Sound and Vibration 2009, ICSV 2009, 5 July 2009 through 9 July 2009, Krakow, Poland
QC 201409232014-09-232014-09-232014-09-23Bibliographically approved