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Energies 2012, 5(4), 968-1000; doi:10.3390/en5040968

Article

Analysis of the Induction and Wake Evolution of an Offshore Floating Wind Turbine

Thomas Sebastian*  and Matthew Lackner

Department of Mechanical and Industrial Engineering, University of Massachusetts, 160 Governors Drive, Amherst, MA 01003-9265, USA

* Author to whom correspondence should be addressed.

Received: 3 February 2012; in revised form: 29 March 2012 / Accepted: 9 April 2012 / Published: 17 April 2012

(This article belongs to the Special Issue Wind Turbines)

Download PDF Full-Text [14236 KB, uploaded 17 April 2012 16:38 CEST]

Abstract: The degrees-of-freedom associated with offshore floating wind turbines (OFWTs) result in a more dynamic flow field. The resulting aerodynamic loads may be significantly influenced by these motions via perturbations in the evolving wake. This is of great interest in terms of OFWT design, placement and simulation. This study presents free vortex wake method (FVM) simulations of the NREL 5-MW wind turbine of a variety of platforms, operating in a range of wind speeds synthesized platform motion time series. Motion-induced wake perturbations are observed to affect induction. Transitions between windmill and propeller states are also observed.

Keywords: offshore floating wind turbine; free vortex wake method; wake evolution

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