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The leading-edge vortex of swift wing-shaped delta wings.
R Soc Open Sci. 2017 Aug; 4(8):170077.RS

Abstract

Recent investigations on the aerodynamics of natural fliers have illuminated the significance of the leading-edge vortex (LEV) for lift generation in a variety of flight conditions. A well-documented example of an LEV is that generated by aircraft with highly swept, delta-shaped wings. While the wing aerodynamics of a manoeuvring aircraft, a bird gliding and a bird in flapping flight vary significantly, it is believed that this existing knowledge can serve to add understanding to the complex aerodynamics of natural fliers. In this investigation, a model non-slender delta-shaped wing with a sharp leading edge is tested at low Reynolds number, along with a delta wing of the same design, but with a modified trailing edge inspired by the wing of a common swift Apus apus. The effect of the tapering swift wing on LEV development and stability is compared with the flow structure over the unmodified delta wing model through particle image velocimetry. For the first time, a leading-edge vortex system consisting of a dual or triple LEV is recorded on a swift wing-shaped delta wing, where such a system is found across all tested conditions. It is shown that the spanwise location of LEV breakdown is governed by the local chord rather than Reynolds number or angle of attack. These findings suggest that the trailing-edge geometry of the swift wing alone does not prevent the common swift from generating an LEV system comparable with that of a delta-shaped wing.

Authors+Show Affiliations

Institute for Energy Systems, School of Engineering, University of Edinburgh, Edinburgh, UK.Institute for Energy Systems, School of Engineering, University of Edinburgh, Edinburgh, UK.Institute for Energy Systems, School of Engineering, University of Edinburgh, Edinburgh, UK.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28878968

Citation

Muir, Rowan Eveline, et al. "The Leading-edge Vortex of Swift Wing-shaped Delta Wings." Royal Society Open Science, vol. 4, no. 8, 2017, p. 170077.
Muir RE, Arredondo-Galeana A, Viola IM. The leading-edge vortex of swift wing-shaped delta wings. R Soc Open Sci. 2017;4(8):170077.
Muir, R. E., Arredondo-Galeana, A., & Viola, I. M. (2017). The leading-edge vortex of swift wing-shaped delta wings. Royal Society Open Science, 4(8), 170077. https://doi.org/10.1098/rsos.170077
Muir RE, Arredondo-Galeana A, Viola IM. The Leading-edge Vortex of Swift Wing-shaped Delta Wings. R Soc Open Sci. 2017;4(8):170077. PubMed PMID: 28878968.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The leading-edge vortex of swift wing-shaped delta wings. AU - Muir,Rowan Eveline, AU - Arredondo-Galeana,Abel, AU - Viola,Ignazio Maria, Y1 - 2017/08/23/ PY - 2017/01/27/received PY - 2017/07/27/accepted PY - 2017/9/8/entrez PY - 2017/9/8/pubmed PY - 2017/9/8/medline KW - bird wing aerodynamics KW - common swift KW - delta wing KW - leading-edge vortex KW - particle image velocimetry KW - swept wing SP - 170077 EP - 170077 JF - Royal Society open science JO - R Soc Open Sci VL - 4 IS - 8 N2 - Recent investigations on the aerodynamics of natural fliers have illuminated the significance of the leading-edge vortex (LEV) for lift generation in a variety of flight conditions. A well-documented example of an LEV is that generated by aircraft with highly swept, delta-shaped wings. While the wing aerodynamics of a manoeuvring aircraft, a bird gliding and a bird in flapping flight vary significantly, it is believed that this existing knowledge can serve to add understanding to the complex aerodynamics of natural fliers. In this investigation, a model non-slender delta-shaped wing with a sharp leading edge is tested at low Reynolds number, along with a delta wing of the same design, but with a modified trailing edge inspired by the wing of a common swift Apus apus. The effect of the tapering swift wing on LEV development and stability is compared with the flow structure over the unmodified delta wing model through particle image velocimetry. For the first time, a leading-edge vortex system consisting of a dual or triple LEV is recorded on a swift wing-shaped delta wing, where such a system is found across all tested conditions. It is shown that the spanwise location of LEV breakdown is governed by the local chord rather than Reynolds number or angle of attack. These findings suggest that the trailing-edge geometry of the swift wing alone does not prevent the common swift from generating an LEV system comparable with that of a delta-shaped wing. SN - 2054-5703 UR - https://www.unboundmedicine.com/medline/citation/28878968/The_leading_edge_vortex_of_swift_wing_shaped_delta_wings_ L2 - https://royalsocietypublishing.org/doi/full/10.1098/rsos.170077?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -
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