Experimental investigation of aerodynamic damping effects on a semi-submersible floating offshore wind turbine

Chen, J; Duan, F; Hu, Z

Experimental investigation of aerodynamic damping effects on a semi-submersible floating offshore wind turbine

Lookup NU author(s): Professor Zhiqiang Hu

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Abstract

Copyright © 2017 by the International Society of Offshore and Polar Engineers (ISOPE).Recently, it has been found that aerodynamic damping has significant effects on the dynamic responses of offshore floating wind turbines in operating conditions. This study seeks to investigate the aerodynamic damping effects on an OC4 semi-submersible floating wind turbine by a series of scaled model tests. It is found that the aerodynamic damping effects are active in reducing the resonant responses of the surge and pitch motion. Furthermore, the aerodynamic damping is influenced by the incoming wind speed and the rotating blades. In addition, it is found that the aerodynamic damping suppresses the vibration of the tower. Finally, it is found that the redesigned performance-matched blades potentially have a higher fidelity in the aerodynamic damping than the geometrically similar blades.