%0 Journal Article
%@ 14746670
%A Zanon, Mario
%A Gros, Sébastien
%A Meyers, Johan
%A Diehl, Moritz
%D 2014
%F eprints:4029
%I Elsevier
%J IFAC Proceedings Volumes
%N 3
%P 5814-5819
%T Airborne Wind Energy: Airfoil-Airmass Interaction
%U http://eprints.imtlucca.it/4029/
%V 47
%X The Airborne Wind Energy paradigm proposes to generate energy by flying a tethered airfoil across the wind flow at a high velocity. While Airborne Wind Energy enables flight in higher-altitude, stronger wind layers, the extra drag generated by the tether motion imposes a significant limit to the overall system efficiency. To address this issue, two airfoils with a shared tether can reduce overall system drag. A study proposed in Zanon et al. (2013) confirms this claim by showing that, in the considered scenario, the dual-airfoil system is more advantageous than the single-airfoil one. The results computed in Zanon et al. (2013) however, do not model the interaction between the airfoils and the airmass. In this paper, the impact of the airfoil-airmass interaction on the extracted power is studied. As this phenomenon is complex to model, a blade element-momentum approach is proposed and the problem is solved by means of optimal control techniques.
%Z Proceedings of the 19th World Congress  The International Federation of Automatic Control  Cape Town, South Africa. August 24-29, 2014