Preprint Article Version 1 This version is not peer-reviewed

Numerical Validation of Floating Offshore Wind Turbine Scaled Rotor for Surge Motion

Version 1 : Received: 29 August 2018 / Approved: 29 August 2018 / Online: 29 August 2018 (06:43:56 CEST)

A peer-reviewed article of this Preprint also exists.

Sivalingam, K.; Martin, S.; Singapore Wala, A.A. Numerical Validation of Floating Offshore Wind Turbine Scaled Rotors for Surge Motion. Energies 2018, 11, 2578. Sivalingam, K.; Martin, S.; Singapore Wala, A.A. Numerical Validation of Floating Offshore Wind Turbine Scaled Rotors for Surge Motion. Energies 2018, 11, 2578.

Journal reference: Energies 2018, 11, 2578
DOI: 10.3390/en11102578

Abstract

Aerodynamic performance of a floating offshore wind turbine (FOWT) is significantly influenced by platform surging motions. Accurate prediction of the unsteady aerodynamic loads is imperative for determining the fatigue life, ultimate loads on key components such as FOWT rotor blades, gearbox and power converter. The current study examines the predictions of numerical codes by comparing with unsteady experimental results of a scaled floating wind turbine rotor. The influence of platform surge amplitude together with the tip speed ratio on the unsteady aerodynamic loading has been simulated through unsteady CFD. It is shown that the unsteady aerodynamic loads of FOWT are highly sensitive to the changes in frequency and amplitude of the platform motion. Also, the surging motion significantly influences the windmill operating state due to strong flow interaction between the rotating blades and generated blade-tip vortices. Almost in all frequencies and amplitudes, CFD, LR-BEM and LR-uBEM predictions of mean thrust shows a good correlation with experimental results.

Subject Areas

CFD; unsteady BEM; floating offshore wind turbine; scaled wind turbine rotor

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