Three-dimensional effects on the aerodynamic performance of flapping wings in tandem configuration

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Show simple item record Arranz Fernández, Gonzalo Flores Arias, Óscar García-Villalba Navaridas, Manuel 2022-09-02T08:30:19Z 2022-09-02T08:30:19Z 2020-04-01
dc.identifier.bibliographicCitation Journal of Fluids and Structures, (2020), v. 94, 102893, pp.: 1-16.
dc.identifier.issn 0889-9746
dc.description.abstract Direct numerical simulations have been performed to analyze how three-dimensional effects influence the performance of wings in tandem configuration undergoing a two-dimensional optimal kinematics. This optimal motion is a combination of heaving and pitching of the airfoils in a uniform free-stream at a Reynolds number and Strouhal number . Wings of two different aspect ratios, 2 and 4, undergoing the 2D motion have been considered. It has been found that the interactions between the vortical structures of the fore- and the hind-wings are qualitatively similar to the two-dimensional case for both . However, the ratio between the mean thrust of the hind-wing and the fore-wing decreases from 80% in 2D to 70% in 3D, implying that the 3D effects are detrimental for the vortical interactions between the wings in terms of thrust production. Nonetheless, the propulsive efficiency remains constant both in 2D and 3D, for both . A more realistic flapping motion has also been analyzed and compared to the heaving motion. It has been found that the aerodynamic forces decrease when the wings are in flapping motion. This detrimental behavior has been linked to a sub-optimal motion of the inboard region of the wings. This sub-optimal region of the wings entails a decrease of the mean thrust and of the propulsive efficiency compared to the heaving case, which are more pronounced for the 4 wings.
dc.description.sponsorship This work was supported by grant DPI2016-76151-C2-2-R (AEI/FEDER, UE). The computations were partially performed at the supercomputer Tirant from the Red Española de Supercomputación in activity FI-2018-2-0025.
dc.format.extent 16
dc.publisher Elsevier
dc.rights © 2020 Elsevier Ltd. All rights reserved.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.subject.other Flapping wings
dc.subject.other Aerodynamic forces
dc.subject.other Reynolds number
dc.subject.other Strouhal number
dc.subject.other Direct numerical simulation
dc.title Three-dimensional effects on the aerodynamic performance of flapping wings in tandem configuration
dc.type article
dc.description.status Publicado
dc.subject.eciencia Aeronáutica
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. DPI2016-76151-C2-2-R
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationissue 102893
dc.identifier.publicationlastpage 16
dc.identifier.publicationtitle JOURNAL OF FLUIDS AND STRUCTURES
dc.identifier.publicationvolume 94
dc.identifier.uxxi AR/0000025682
dc.contributor.funder Ministerio de Economía y Competitividad (España)
dc.affiliation.dpto UC3M. Departamento de Ingeniería Aeroespacial
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Ingeniería Aeroespacial
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