A Computational Simulation Of The Motion
Of Floating Wind Turbine Platforms
Author(s)
A. Nematbakhsh, D. J. Olinger & G. Tryggvason
Abstract
The dynamic motion of floating wind turbines is studied using numerical
simulations. The full Navier-Stokes equations are solved on a regular structured
grid, using a level set method for the free surface and an immersed boundary
method to model the turbine platform. The response of a tension leg platform to
moderate amplitude waves is examined and the effect of a key design parameter
is quantified in this initial study. It is shown that the pitch and surge motion
amplitudes are larger than heave motions, and that increased ballast weight helps
to stabilize the platform motions and reduce tether tensions.
Keywords: floating wind turbines, numerical simulation, fluid-structure
interaction, level-set methods.
1 Introduction
Using wind to produce electricity is attractive since wind resources are relatively
plentiful, the basic technology is well developed and it is rapidly becoming
economically competitive with conventional carbon based electricity production.
As its use has grown, however, concerns have emerged. Places best suitable for
land-based wind-turbines, such as the plains of the midwest United States, are
often located far from densely populated areas along the coasts; and a nonnegligible
fraction of the population objects to the visual impact of wind-turbines
on beaches, mountaintops, and most places in between. Placing floating wind
turbines far offshore avoids most of these concerns. The wind is usually stronger
and steadier, and the potential negative impact of the turbines is minimal.
Keywords
floating wind turbines, numerical simulation, fluid-structureinteraction, level-set methods
Related Book
Other papers in this volume
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