Noise directivity from a vertical axis wind turbine

Möllerström, ErikHögskolan i Halmstad,Uppsala universitet,Elektricitetslära,Energiteknik,Division for Electricity, Department of Engineering Sciences, Uppsala University, Uppsala, Sweden (författare)

The directivity of wind turbine noise is of widespread interest and has received attention over an extended period. The reason for this is partly that noise optimization procedures can be implemented in order to increase the efficiency of the power output. Although directivity of horizontal axis wind turbines (HAWTs) are well understood, the directivity pattern around vertical axis wind turbines (VAWTs) are less well investigated.This paper presents measurements of directivity on a 200 kW VAWT, a so called H-rotor, with variable speed and a tower height of 40 m. The turbine, which is situated in a flat agricultural landscape close to Falkenberg at the Swedish west coast, is one of the world’s largest today operational VAWTs. Experimental results as well as a theoretical model based on the turbulent-boundary-layer trailing-edge (TBL-TE) noise suggest higher noise levels upwind of the rotor and the lowest noise levels in the perpendicular directions. Moreover, modulation analysis of the measurements indicates the presence of modulations but the results are inconclusive.

Bolin, KarlMarcus Wallenberg Laboratory, Department of Aeronautical and Vehicle Engineering, KTH Royal Institute of Technology, Stockholm, Sweden (författare)
Ottermo, Fredric,1975-Högskolan i Halmstad,Energiteknik(Swepub:hh)freott (författare)
Bååth, L.B.1948-Högskolan i Halmstad,Maskinteknisk produktframtagning (MTEK)(Swepub:hh)baath (författare)
Hylander, Jonny,1955-Högskolan i Halmstad,Energiteknik(Swepub:hh)jonhyl (författare)
Uppsala universitetElektricitetslära (creator_code:org_t)

Ingår i:Proceedings of the 6th InternationalÂ Conference on Wind Turbine NoiseNew Brighton, UK : INCE/Europe
Ingår i:Proceedings of the 6th International Conference on Wind Turbine Noise 2015New Brighton, UK : INCE/Europe

Av författaren/redakt...: Möllerström, Eri ...; Bolin, Karl; Ottermo, Fredric ...; Bååth, L.B. 1948 ...; Hylander, Jonny, ...

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Maskinteknik; och Energiteknik

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.