Current and turbulence measurements at the FINO1 offshore wind energy site: analysis using 5-beam ADCPs

We report concurrent measurements of ocean currents and turbulence at two sites in the North Sea, one site at upwind of the FINO1 platform and the other 200-m downwind of the Alpha Ventus wind farm. At each site, mean currents, Reynolds stresses, turbulence intensity and production of turbulent kine...

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Bibliographic Details
Published in:Ocean dynamics 2018, Vol.68 (1), p.109-130
Main Authors: Bakhoday-Paskyabi, Mostafa, Fer, Ilker, Reuder, Joachim
Format: Article
Language:English
Subjects:
10-12 May 2016
Atmospheric Sciences
Boundary layers
Columnar structure
Columns (structural)
Doppler sonar
Earth and Environmental Science
Earth Sciences
Energy consumption
Fluid- and Aerodynamics
Geophysics/Geodesy
Kinetic energy
Monitoring/Environmental Analysis
Norway
Ocean currents
Ocean floor
Oceanic turbulence
Oceanography
Oceans
Offshore
Offshore drilling rigs
Offshore energy sources
Oslo
Profiles
Reynolds stresses
Sea currents
Stresses
Topical Collection on the 18th Joint Numerical Sea Modelling Group Conference
Turbulence
Turbulence intensity
Turbulence measurement
Turbulent kinetic energy
Water column
Water depth
Wind effects
Wind farms
Wind power
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Description
Summary:We report concurrent measurements of ocean currents and turbulence at two sites in the North Sea, one site at upwind of the FINO1 platform and the other 200-m downwind of the Alpha Ventus wind farm. At each site, mean currents, Reynolds stresses, turbulence intensity and production of turbulent kinetic energy are obtained from two bottom-mounted 5-beam Nortek Signature1000s, high-frequency Doppler current profiler, at a water depth of approximately 30 m. Measurements from the two sites are compared to statistically identify the effects of wind farm and waves on ocean current variability and the turbulent structure in the water column. Profiles of Reynolds stresses are found to be sensible to both environmental forcing and the wind farm wake-induced distortions in both boundary layers near the surface and the seabed. Production of turbulent kinetic energy and turbulence intensity exhibit approximately similar, but less pronounced, patterns in the presence of farm wake effects.
ISSN:1616-7341
1616-7228
DOI:10.1007/s10236-017-1109-5