Assessment of 3D aerodynamic effects on the behaviour of floating wind turbines

The Science of Making Torque from Wind 2012

Manolas, D.^1 ; Riziotis, V.^1 ; Voutsinas, S.^1

National Technical University of Athens, Laboratory of Aerodynamics, Greece^1

关键词: 3D aerodynamics;    Aerodynamic modeling;    Aerodynamic modelling;    Blade-element momentums;    Floating wind turbines;    State of the art;    Stochastic simulations;    Vortex methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/555/1/012067/pdf
DOI  :  10.1088/1742-6596/555/1/012067

来源: IOP

【 摘 要 】

Current state-of-art models for floating wind turbines are built by merging separate modules addressing the four basic aspects leading to a compound hydro-servo-aero-elastic time domain solver. While current state-of-the-art models differ in many aspects, they all use the blade element momentum (BEM) aerodynamic modelling. Due to its low cost, BEM is the standard choice for design purposes. However the use of BEM entails several semi-empirical corrections and add-ons that need reconsideration and recalibration when new features appear. For floating wind turbines, the effect of the floater motions is such a new feature. In the present paper, this aspect is investigated by comparing BEM based results against 3D free-wake simulations. Deterministic as well as stochastic simulations are presented in pure aerodynamic and full aeroelastic context. It is confirmed that asymmetric inflow originating from yaw misalignment and shear give significant differences reflected on mean values and amplitudes.