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Dynamic Response Analysis of Three Floating Wind Turbine Concepts with a Two-Bladed Darrieus Rotor

Cheng, Zhengshun; Wang, Kai; Gao, Zhen; Moan, Torgeir
Journal article, Peer reviewed
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URI
http://hdl.handle.net/11250/2391312
Date
2015
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  • Institutt for marin teknikk [3318]
  • Publikasjoner fra CRIStin - NTNU [35008]
Original version
Journal of Ocean and Wind Energy 2015, 2(4):213-222   10.17736/jowe.2015.jcr33
Abstract
Recently, interest in the development of floating vertical axis wind turbines (FVAWTs) has been increasing, since FVAWTs

might prove to be one of the optimal configurations in deep waters. In this study, a FVAWT with a 5 MW Darrieus rotor

was used as the reference wind turbine and was mounted on three different floating support structures: the OC3 spar buoy,

the OC4 semi-submersible, and a tension leg platform (TLP). Fully coupled nonlinear time domain simulations using the

code SIMO-RIFLEX-DMS were conducted. A series of load cases with turbulent wind and irregular waves was carried out

to investigate the dynamic responses of these three FVAWT concepts by estimating the generator power production, the

platform motions, the tower base bending moments, and the mooring line loads. For the spar, semi-submersible, and TLP

FVAWT concepts, twice-per-revolution (2P) effects resulting from the 2P aerodynamic loads are prominent in the dynamic

responses of these concepts. Because of the compliant catenary mooring systems, the spar and the semi-submersible can

help to mitigate the 2P effects on structural loads and mooring line tensions as compared to the TLP concept, at the cost of

larger platform motions. The TLP is not a good substructure for a vertical axis wind turbine unless the cyclic variation of

aerodynamic loads is significantly reduced.
Publisher
ISOPE Publications
Journal
Journal of Ocean and Wind Energy

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