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The surge-heave-pitch coupling motions of the Φ-type vertical axis wind turbine supported by the truss spar floating foundation

  • Ying Guo (郭颖)
  • Li-qin Liu (刘利琴)Email author
  • Yan Li (李焱)
  • Chang-shui Xiao (肖昌水)
  • You-gang Tang (唐友刚)
Article
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Abstract

Motions of the floating vertical axis wind turbine (VAWT) considering the coupling between aerodynamics and hydrodynamics were studied. The surge-heave-pitch coupling nonlinear equations of the floating VAWT were established. The aerodynamic loads were obtained by applying the double-multiple-stream tube theory with the consideration of the dynamic stall and the floating foundation motion. The motion performances of a 5MW Φ-Darrieus type floating VAWT were studied of which the foundation is Spar type with heave plates. It is shown that the amplitude of heave motion of the floating VAWT is small when the heave plates are equipped. The effects of wind and wave loads on the floating VAWT motions were assessed. The results show that the mean values of surge and pitch of the floating VAWT mainly depend on the wind loads; the standard deviations of surge, heave, and pitch mainly depend on the wave loads. For the regular wave cases, the frequencies of surge, heave and pitch are dominated by the wave frequencies, and the components of 2P responses (caused by the aerodynamic loads) of pitch are small. The 2P responses of pitch are more significant in the irregular wave cases compared with results of regular wave cases.

Key words

Floating VAWT truss spar floating foundation surge-heave-pitch motions aerodynamics regular waves irregular waves 

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Copyright information

© China Ship Scientific Research Center 2018

Authors and Affiliations

  • Ying Guo (郭颖)
    • 1
  • Li-qin Liu (刘利琴)
    • 1
    Email author
  • Yan Li (李焱)
    • 1
  • Chang-shui Xiao (肖昌水)
    • 1
  • You-gang Tang (唐友刚)
    • 1
  1. 1.State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjinChina

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