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Nonlinear Simulation of a Spar Buoy Floating Wind Turbine

[+] Author Affiliations
Ali Nematbakhsh, David J. Olinger

Worcester Polytechnic Institute, Worcester, MA

Gretar Tryggvason

University of Notre Dame, Notre Dame, IN

Paper No. FEDSM2013-16494, pp. V01CT26A005; 6 pages
doi:10.1115/FEDSM2013-16494
From:
  • ASME 2013 Fluids Engineering Division Summer Meeting
  • Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Liquid-Solids Flows; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes; Transport Phenomena in Mixing; Turbulent Flows: Issues and Perspectives
  • Incline Village, Nevada, USA, July 7–11, 2013
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5556-0
  • Copyright © 2013 by ASME

abstract

A computational model, developed in Nematbakhsh et al. [1], is used to predict the response of a spar buoy floating wind turbine to moderate amplitude waves. The method is based on solving the unsteady Navier-Stokes equations with a level set method to predict the free surface motion and an immersed boundary method for tracking the floating wind turbine. The tethers, tower, nacelle, and rotor are included using reduced order models, leading to a reasonably efficient computational approach. Wind is modeled as a constant thrust force. Results are presented for a full-scale 5 MW turbine mounted on a spar buoy platform. Pitch and surge response, as well as tethers tension are studied as a function of time for one incident wave frequency and amplitude and the results are discussed. The results show that for a spar buoy floating wind turbine with three taut tethers, there is a possibility of significant higher load on one tether.

Copyright © 2013 by ASME

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