Numerical validation of floating offshore wind turbine scaled rotors for surge motion

Krishnamoorthi Sivalingam, Steven Martin, Abdulqadir Aziz Singapore Wala

Research output: Contribution to journalArticle

3 Citations (Scopus)

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.

LanguageEnglish
Article number2578
Number of pages25
JournalEnergies
Volume11
Issue number10
DOIs
Publication statusPublished - 27 Sep 2018

Fingerprint

Offshore wind turbines
Surge
Wind Turbine
Rotor
Aerodynamic loads
Rotors
Aerodynamics
Blade
Motion
Computational fluid dynamics
Flow interactions
Power converters
Prediction
Wind turbines
Turbomachine blades
Vortex flow
Gearbox
Power Converter
Fatigue of materials
Fatigue Life

Keywords

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

Cite this

Sivalingam, Krishnamoorthi ; Martin, Steven ; Wala, Abdulqadir Aziz Singapore. / Numerical validation of floating offshore wind turbine scaled rotors for surge motion. In: Energies. 2018 ; Vol. 11, No. 10.
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Numerical validation of floating offshore wind turbine scaled rotors for surge motion. / Sivalingam, Krishnamoorthi; Martin, Steven; Wala, Abdulqadir Aziz Singapore.

In: Energies, Vol. 11, No. 10, 2578, 27.09.2018.

Research output: Contribution to journalArticle

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AU - Martin, Steven

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AB - 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.

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