23 Jan 2023
23 Jan 2023
Status: this preprint is currently under review for the journal WES.

Nonlinear Inviscid Aerodynamic Effects of Floating Offshore Wind Turbine Motion

Andre F. P. Ribeiro, Damiano Casalino, and Carlos S. Ferreira Andre F. P. Ribeiro et al.
  • Delft University of Technology, Kluyverweg 1, Delft, Netherlands

Abstract. We investigate the aerodynamics of a surging, heaving, and yawing wind turbine with numerical simulations based on a free wake panel method. We focus on the UNAFLOW case: a surging wind turbine which was modelled experimentally and with various numerical methods. Good agreement with experimental data is observed for amplitude and phase of the thrust with surge motion. We achieve numerical results of a wind turbine wake that accurately reproduce experimentally verified effects of surging motion. We then extend our simulations beyond the frequency range of the UNAFLOW experiments and reach results that do not follow a quasi-steady response for surge. Finally, simulations are done with the turbine in yaw and heave motion and the impact of the wake motion on the blade thrust is examined. Our work seeks to contribute a different method to the pool of results for the UNAFLOW case, while extending the analysis to conditions that have not been simulated before.

Andre F. P. Ribeiro et al.

Status: open (until 20 Feb 2023)

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Andre F. P. Ribeiro et al.

Andre F. P. Ribeiro et al.


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Short summary
Floating offshore wind turbines move due to not having a rigid foundation. Hence, as the blades rotate they go through more complex aerodynamics than standard onshore wind turbines. In this paper, we show computational simulations of a wind turbine rotor moving in various ways and quantify the difference this motion makes in the forces acting on the blades. We show that these forces behave in nonlinear ways when the motion of the turbine is increased.