Abstract
The growing number of Floating Offshore Wind Turbine (FOWT) concepts that utilize a single point mooring and therefore rely on the self-alignment capabilities of the wind turbine (e.g. SCD nezzy or SelfAligner by CRUSE Offshore) demands an extension of the simulation methods used for their development. A crucial issue for these concepts is the accurate prediction of forces and moments, which contribute to the self-alignment. In contrast to the well-studied behaviour of torque and thrust, yaw moment and lateral forces on a rotor under yawed conditions have not been in focus of previous experimental tests for the validation of aerodynamic simulation tools. In the present work, a model turbine equipped with a 6-axis force/moment sensor to capture the complete load on the rotor is presented. A detailed study of the two-bladed model turbine’s aerodynamic behaviour under yawed conditions was carried out within a range of yaw angles between -55 to + 55° with steps of 1 – 2.5°.
Highlights
The large number of recently erected prototypes and funded demonstration projects in the field of floating offshore wind turbines worldwide shows the extent to which governments and the industry are interested in this technology
The growing number of Floating Offshore Wind Turbine (FOWT) concepts that utilize a single point mooring and rely on the self-alignment capabilities of the wind turbine (e.g. SCD nezzy or SelfAligner by CRUSE Offshore) demands an extension of the simulation methods used for their development
In contrast to the wellstudied behaviour of torque and thrust, yaw moment and lateral forces on a rotor under yawed conditions have not been in focus of previous experimental tests for the validation of aerodynamic simulation tools
Summary
The large number of recently erected prototypes and funded demonstration projects in the field of floating offshore wind turbines worldwide shows the extent to which governments and the industry are interested in this technology. Most current designs utilize a conventional offshore wind turbine mounted on an individually designed floating platform like the Hywind Spar or the Floatgen Demonstrator. Most current designs utilize a conventional offshore wind turbine mounted on an individually designed floating platform like the Hywind Spar or the Floatgen Demonstrator2 Another approach makes use of the floating platforms manoeuvrability instead of a yaw bearing at the tower top to align the rotor with the wind. Several concepts of these self-aligning floating wind turbines were presented in the past
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