Frederik Ettrup Brink and Nicolai Gayle Nygaard
Shear and Turbulence
Profiles Offshore
Offshore turbulence profiles
2
9 offshore met masts
Sites in northern Europe
MSc thesis by Daniel Pollak (2014)
-Co-supervised by DTU Wind Energy
and University of Oldenburg
Turbulence intensity profiles
3
Similar across sites
4
90th percentile turbulence intensity
5
Implications
6
Increased hub height means less turbulence
Power performance
Wakes
Design loads
North Sea, UK
7
Negative shear
High shear
Very low shear
Negative shear
11
Shear distribution binned by sector
12
Turbulence vs shear
13