Open AccessPassive self-aligning of a floating offshore wind turbine
Author(s) -
Stefan Netzband,
C W Schulz,
Moustafa AbdelMaksoud
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1618/5/052027
Subject(s) - turbine , offshore wind power , marine engineering , turret , tower , rotor (electric) , offset (computer science) , aerodynamics , engineering , rotation (mathematics) , airfoil , wind power , wake , aerospace engineering , structural engineering , mechanical engineering , computer science , electrical engineering , artificial intelligence , programming language
The development of floating offshore wind turbines opens the way for various new design types, and the platform, tower and turbine can benefit from its floating foundation. Self-aligning platforms, where the entire structure follows the wind direction are a promising concept. A single point mooring with turret system allows for free rotation around the vertical axis. Aerodynamic forces of rotor and tower induce the self-aligning moment. In the present study, the operating principle of a passive platform design with airfoil-shaped tower and downwind rotor is analyzed under steady conditions using a boundary element method (BEM). Rotor cone angle and the tower dimensions have a major influence on the yawing moment. They must be large enough to dominate the hydrodynamic forces induced by seaway and current. The passive self-aligning capability is shown in an integrated simulation for various current velocities and wind-current offset angles.