Wind field effect on the power generation and aerodynamic performance of offshore floating wind turbines

Liang Li, Yuanchuan Liu, Zhiming Yuan, Yan Gao

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This study is aimed at investigating wind field effect on the power generation and the aerodynamic performance of offshore floating wind turbines. For this purpose, three comparative wind fields are generated: a uniform wind field, a steady wind field with wind shear, and a turbulent wind field. Aero-hydro-servo coupled analysis is performed in time-domain to estimate how a referenced semi-submersible offshore floating wind turbine behaves in the three wind fields. The results reveal the importance of wind shear and inflow turbulence to the performance of the floating wind turbine. Thrust force and power generation become very unstable in the presence of inflow turbulence. Due to the control strategy of the wind turbine, the power generation is also correlated with operational state and turbulence frequency. Although wind shear has a tiny effect on the rotor performance, the local aero-dynamic load applied at a single blade experiences fluctuation with the presence of wind shear. It is also shown that the ultimate structural and fatigue damage loads at blade root are augmented by inflow turbulence and wind shear.
LanguageEnglish
Pages379-390
Number of pages12
JournalEnergy
Volume157
Early online date29 May 2018
DOIs
Publication statusPublished - 15 Aug 2018

Fingerprint

Wind turbines
Power generation
Aerodynamics
Turbulence
Aerodynamic loads
Fatigue damage
Rotors

Keywords

  • wind field
  • inflow turbulence
  • wind shear
  • power generation
  • aerodynamic performance
  • offshore floating wind turbine

Cite this

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abstract = "This study is aimed at investigating wind field effect on the power generation and the aerodynamic performance of offshore floating wind turbines. For this purpose, three comparative wind fields are generated: a uniform wind field, a steady wind field with wind shear, and a turbulent wind field. Aero-hydro-servo coupled analysis is performed in time-domain to estimate how a referenced semi-submersible offshore floating wind turbine behaves in the three wind fields. The results reveal the importance of wind shear and inflow turbulence to the performance of the floating wind turbine. Thrust force and power generation become very unstable in the presence of inflow turbulence. Due to the control strategy of the wind turbine, the power generation is also correlated with operational state and turbulence frequency. Although wind shear has a tiny effect on the rotor performance, the local aero-dynamic load applied at a single blade experiences fluctuation with the presence of wind shear. It is also shown that the ultimate structural and fatigue damage loads at blade root are augmented by inflow turbulence and wind shear.",
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Wind field effect on the power generation and aerodynamic performance of offshore floating wind turbines. / Li, Liang; Liu, Yuanchuan; Yuan, Zhiming; Gao, Yan.

In: Energy, Vol. 157, 15.08.2018, p. 379-390.

Research output: Contribution to journalArticle

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AU - Li, Liang

AU - Liu, Yuanchuan

AU - Yuan, Zhiming

AU - Gao, Yan

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