Using the Helix Mixing Approach on Floating Offshore Wind Turbines

Journal article (2022)

Authors

D.G. van den Berg Team Jan-Willem van Wingerden - Mechanical, Maritime and Materials Engineering
Delphine de Tavernier Wind Energy - Aerospace Engineering
J.W. van Wingerden Team Jan-Willem van Wingerden - Mechanical, Maritime and Materials Engineering
Research Group
Large Scale Energy Storage (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2022 D. van den Berg, D. De Tavernier, J.W. van Wingerden
DOI: https://doi.org/10.1088/1742-6596/2265/4/042011
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Published Date

2022

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Large Scale Energy Storage

Abstract

In recent years dynamic induction control has shown great potential in reducing wake-to-turbine interaction by increasing the mixing in the wake. With these wake mixing methods the thrust force will vary in time. If applied to a floating offshore wind turbine, it will cause the platform to move. In this paper the effect of the Helix mixing approach on a DTU10MW turbine on the TripleSpar platform and its wake is evaluated. When the Helix mixing approach is applied at Strouhal equal to 0.25, the yaw movement is excited close to the eigenfrequency of the platform resulting in significant yaw angles for small blade pitch angles. To understand the impact of the motion on the wake, the yaw motion is simulated using the free wake vortex method as implemented in Qblade. Under laminar inflow, results show that the windspeed at a distance of 5 rotor diameters downstream can be increased by up to 10% compared to a fixed-bottom turbine.