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Numerical investigation of three-dimensional asymmetric hovering flapping flight

Diaz-Arriba, Daniel and Jardin, Thierry and Gourdain, Nicolas and Pons, Frédéric and David, Laurent Numerical investigation of three-dimensional asymmetric hovering flapping flight. (2021) Physics of Fluids, 33 (11). ISSN 1070-6631

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Official URL: https://doi.org/10.1063/5.0069840

Abstract

Direct numerical simulations are performed to assess the aerodynamic performance of three-dimensional wings undergoing asymmetric hovering flapping flight. A large number of flapping kinematics is investigated, varying the pitch rate and the upstroke and downstroke angles of attack. We show that, for all cases, time-average performance is driven, to leading order, by the mean angle of attack over a flapping period despite the increased contribution of drag to vertical force with increased stroke plane angle. We hence suggest that asymmetric hovering is not intrinsically more efficient than normal hovering, conversely to what has been previously reported in the literature. This may explain the underrepresentation of this flight mode in nature.

Item Type:Article
Additional Information:Thanks to the American Institute of Physics (AIP). This paper is available at : https://aip.scitation.org/doi/10.1063/5.0069840
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > ISAE-ENSMA Ecole Nationale Supérieure de Mécanique et d'Aérotechnique (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Université de Poitiers (FRANCE)
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Deposited On:22 Nov 2021 12:51

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