Open this publication in new window or tab >>2023 (English)In: EERA DeepWind conference 2023 / [ed] Tande, J. O. G.; Kvamsdal, T.; Muskulus, M., Institute of Physics Publishing (IOPP), 2023, article id 012001Conference paper, Published paper (Refereed)
Abstract [en]
The Counter-Rotating Axis Floating Tilted turbine (CRAFT) is a new design for floating off-shore wind power, which utilizes a low center of gravity and allows the tower to tilt to mitigate costs for platforming.
In this study, 3D simulations of the CRAFT have been performed to investigate the effect from the tower's tilt angle on the aerodynamics of the turbine using a vortex filament method. Due to lack of empirical data of the CRAFT, the method has been benchmark tested against a previous project on a vertical axis wind turbine.
Using this method, the blades' twist angle has been set to achieve good lift-to-drag ratio along the entire blade. Furthermore, the blades' chord length has been determined for optimal Tip Speed Ratio (TSR) 6 when the tower is tilted 30 degrees from vertical position.
The CRAFT has been simulated vertically and tilted 15°, 30° and 45°, for TSRs ranging between 4 and 9. The power coefficients (CP) and normal forces have been determined, and velocity plots are presented to show how the near-wake develops.
The results from this study serves as a basis for further development and design of the CRAFT.
Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2023
Series
Journal of Physics Conference Series, ISSN 1742-6588, E-ISSN 1742-6596 ; 2626
National Category
Energy Engineering
Identifiers
urn:nbn:se:uu:diva-523974 (URN)10.1088/1742-6596/2626/1/012001 (DOI)001147057400001 ()
Conference
EERA DeepWind Conference / 20th Deep Sea Offshore Wind R and D Conference, January 18-20, 2023, SINTEF, Trondheim, Norway
2024-02-272024-02-272024-02-27Bibliographically approved