relation: http://eprints.imtlucca.it/4029/ title: Airborne Wind Energy: Airfoil-Airmass Interaction creator: Zanon, Mario creator: Gros, Sébastien creator: Meyers, Johan creator: Diehl, Moritz subject: T Technology (General) description: 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. publisher: Elsevier date: 2014 type: Article type: PeerReviewed format: application/pdf language: en rights: cc_by_nc identifier: http://eprints.imtlucca.it/4029/1/Zanon2014c.pdf identifier: Zanon, Mario and Gros, Sébastien and Meyers, Johan and Diehl, Moritz Airborne Wind Energy: Airfoil-Airmass Interaction. IFAC Proceedings Volumes, 47 (3). pp. 5814-5819. ISSN 14746670 (2014) relation: http://doi.org/10.3182/20140824-6-ZA-1003.00258 relation: doi:10.3182/20140824-6-ZA-1003.00258