Cristin-resultat-ID: 1937385
Sist endret: 19. oktober 2021, 10:59
NVI-rapporteringsår: 2021
Resultat
Vitenskapelig artikkel
2021

The COTUR project: Remote sensing of offshore turbulence for wind energy application

Bidragsytere:
  • Etienne Cheynet
  • Martin Flügge
  • Joachim Reuder
  • Jasna Bogunovic Jakobsen
  • Yngve Heggelund
  • Benny Svardal
  • mfl.

Tidsskrift

Atmospheric Measurement Techniques
ISSN 1867-1381
e-ISSN 1867-8548
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2021
Publisert online: 2021
Volum: 14
Hefte: 9
Sider: 6137 - 6157
Open Access

Importkilder

Scopus-ID: 2-s2.0-85115638159

Beskrivelse Beskrivelse

Tittel

The COTUR project: Remote sensing of offshore turbulence for wind energy application

Sammendrag

The paper presents the measurement strategy and data set collected during the COTUR (COherence of TURbulence with lidars) campaign. This field experiment took place from February 2019 to April 2020 on the southwestern coast of Norway. The coherence quantifies the spatial correlation of eddies and is little known in the marine atmospheric boundary layer. The study was motivated by the need to better characterize the lateral coherence, which partly governs the dynamic wind load on multi-megawatt offshore wind turbines. During the COTUR campaign, the coherence was studied using land-based remote sensing technology. The instrument setup consisted of three long-range scanning Doppler wind lidars, one Doppler wind lidar profiler and one passive microwave radiometer. Both the WindScanner software and LidarPlanner software were used jointly to simultaneously orient the three scanner heads into the mean wind direction, which was provided by the lidar wind profiler. The radiometer instrument complemented these measurements by providing temperature and humidity profiles in the atmospheric boundary layer. The scanning beams were pointed slightly upwards to record turbulence characteristics both within and above the surface layer, providing further insight on the applicability of surface-layer scaling to model the turbulent wind load on offshore wind turbines. The preliminary results show limited variations of the lateral coherence with the scanning distance. A slight increase in the identified Davenport decay coefficient with the height is partly due to the limited pointing accuracy of the instruments. These results underline the importance of achieving pointing errors under 0.1∘ to study properly the lateral coherence of turbulence at scanning distances of several kilometres.

Bidragsytere

Etienne Cheynet

  • Tilknyttet:
    Forfatter
    ved Institutt for maskin, bygg og materialteknologi ved Universitetet i Stavanger
  • Tilknyttet:
    Forfatter
    ved Geofysisk institutt ved Universitetet i Bergen

Martin Flügge

  • Tilknyttet:
    Forfatter
    ved NORCE Teknologi ved NORCE Norwegian Research Centre AS

Joachim Reuder

  • Tilknyttet:
    Forfatter
    ved Geofysisk institutt ved Universitetet i Bergen

Jasna Bogunovic Jakobsen

  • Tilknyttet:
    Forfatter
    ved Institutt for maskin, bygg og materialteknologi ved Universitetet i Stavanger

Yngve Heggelund

  • Tilknyttet:
    Forfatter
    ved NORCE Teknologi ved NORCE Norwegian Research Centre AS
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