The aerodynamics of floating offshore wind turbines in different working states during surge motion

The aerodynamics of floating offshore wind turbines in different working states during surge motion

Dong, J. (TU Delft Wind Energy; Institute of Civil and Environmental Engineering; Norwegian University of Science and Technology (NTNU))
Viré, A.C. (TU Delft Wind Energy)

2022

The rotor of floating offshore wind turbines with platform motions may undergo different working states during its operation, e.g. from windmill working state to vortex ring and propeller working state. In this paper, an aerodynamic model based on a free wake vortex method is used to simulate the rotor undergoing surge motion. The associated change of working states of the rotor is evaluated quantitatively and visually. The results show that during a full cycle of the surge motion of the floating platform, the rotor experiences alternative onset of the windmill state, vortex ring state, and propeller state, while the later two occur only during the downwind motion of the rotor. The aerodynamic load change corresponding to different working states of the rotor indicates that the vortex ring state is the most unstable phase of the three.

Aerodynamics
Floating offshore wind turbine (FOWT)
Free wake vortex method
Rotor-wake interaction
Vortex ring state (VRS)
Wind energy

http://resolver.tudelft.nl/uuid:4b172198-2e42-4ee1-961b-f7e6b33818fe

https://doi.org/10.1016/j.renene.2022.06.016

0960-1481

Renewable Energy, 195, 1125-1136

Institutional Repository

journal article

© 2022 J. Dong, A.C. Viré