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.
| Language | English |
|---|---|
| Article number | 2578 |
| Number of pages | 25 |
| Journal | Energies |
| Volume | 11 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 27 Sep 2018 |
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Keywords
- CFD
- floating offshore wind turbine
- scaled wind turbine rotor
- unsteady BEM
Cite this
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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 journal › Article
TY - JOUR
T1 - Numerical validation of floating offshore wind turbine scaled rotors for surge motion
AU - Sivalingam, Krishnamoorthi
AU - Martin, Steven
AU - Wala, Abdulqadir Aziz Singapore
PY - 2018/9/27
Y1 - 2018/9/27
N2 - 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.
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.
KW - CFD
KW - floating offshore wind turbine
KW - scaled wind turbine rotor
KW - unsteady BEM
UR - http://www.scopus.com/inward/record.url?scp=85056233592&partnerID=8YFLogxK
UR - https://www.mdpi.com/journal/energies
U2 - 10.3390/en11102578
DO - 10.3390/en11102578
M3 - Article
VL - 11
JO - Energies
T2 - Energies
JF - Energies
SN - 1996-1073
IS - 10
M1 - 2578
ER -