Published June 3, 2022 | Version Final
Conference paper Open

Using The Helix Mixing Approach On Floating Offshore Wind Turbines

Description

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.

Files

Using The Helix Mixing Approach on Floating Offshore Wind Turbines Final.pdf

Additional details

Funding

FLOATECH – Optimization of floating wind turbines using innovative control techniques and fully coupled open source engineering tool 101007142
European Commission