A Modified Free Wake Vortex Ring Method for Horizontal-Axis Wind Turbines

A Modified Free Wake Vortex Ring Method for Horizontal-Axis Wind Turbines

Dong, J. (TU Delft Wind Energy)
Viré, A.C. (TU Delft Wind Energy)
Ferreira, Carlos (TU Delft Wind Energy)
Li, Zhangrui (Shanghai Electric Group Company)
van Bussel, G.J.W. (TU Delft Wind Energy)

2019

A modified free-wake vortex ring model is proposed to compute the dynamics of a floating horizontal-axis wind turbine, which is divided into two parts. The near wake model uses a blade bound vortex model and trailed vortex model, which is developed based on vortex filament method with straight lifting lines assumption. By contrast, the far wake model is based on the vortex ring method. The proposed model is a good compromise between accuracy and computational cost, for example when compared with more complex vortex methods. The present model is used to assess the influence of floating platform motions on the performance of a horizontal-axis wind turbine rotor. The results are validated on the 5 MW NREL rotor and compared with other aerodynamic models for the same rotor subjected to different platform motions. The results show that the proposed method is reliable. In addition, the proposed method is less time consuming and has similar accuracy when comparing with more advanced vortex based methods.

free wake vortex method
horizontal-axis wind turbine
floating wind energy
aerodynamics

http://resolver.tudelft.nl/uuid:177d0c46-05ef-4905-8868-8031ec7aeb95

1996-1073

Energies, 12 (20)

Institutional Repository

journal article

© 2019 J. Dong, A.C. Viré, Carlos Ferreira, Zhangrui Li, G.J.W. van Bussel