Final results from the EU project AVATAR: aerodynamic modelling of 10 MW wind turbines

Schepers, J.G. et al. (2018) Final results from the EU project AVATAR: aerodynamic modelling of 10 MW wind turbines. Journal of Physics: Conference Series, 1037, 022013. (doi:10.1088/1742-6596/1037/2/022013)

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Abstract

This paper presents final results from the EU project AVATAR in which aerodynamic models are improved and validated for wind turbines on a scale of 10 MW and more. Special attention is paid to the improvement of low fidelity engineering (BEM based) models with higher fidelity (CFD) models but also with intermediate fidelity free vortex wake (FVW) models. The latter methods were found to be a good basis for improvement of induction modelling in engineering methods amongst others for the prediction of yawed cases, which in AVATAR was found to be one of the most challenging subjects to model. FVW methods also helped to improve the prediction of tip losses. Aero-elastic calculations with BEM based and FVW based models showed that fatigue loads for normal production cases were over predicted with approximately 15% or even more. It should then be realised that the outcome of BEM based models does not only depend on the choice of engineering add-ons (as is often assumed) but it is also heavily dependent on the way the induced velocities are solved. To this end an annulus and element approach are discussed which are assessed with the aid of FVW methods. For the prediction of fatigue loads the so-called element approach is recommended but the derived yaw models rely on an annulus approach which pleads for a generalised solution method for the induced velocities.

Item Type:Articles
Additional Information:The project AVATAR received funding from the European Union's Seventh programme for research, technological development and demonstration under Grant Agreement NO FP7-ENERGY-2013-1/no 608396.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Barakos, Professor George
Authors: Schepers, J.G., Boorsma, K., Sørensen, N., Voutsinas, , Sieros, G., Rahimi, H., Heisselmann, H., Jost, E., Lutz, T., Maeder, T., Gonzalez, A., Ferreira, C., Stoevesandt, B., Barakos, G., Lampropoulos, N., Croce, A., and Madsen, J.
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Journal of Physics: Conference Series
Publisher:IOP Publishing
ISSN:1742-6588
ISSN (Online):1742-6596
Copyright Holders:Copyright © 2018 IOP Publishing
First Published:First published in Journal of Physics: Conference Series 1037:022013
Publisher Policy:Reproduced under a Creative Commons License

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