Direct numerical simulations of the flow around wings with spanwise waviness at a very low Reynolds number

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Title: Direct numerical simulations of the flow around wings with spanwise waviness at a very low Reynolds number
Authors: Serson, D
Meneghini, JR
Sherwin, SJ
Item Type: Journal Article
Abstract: Inspired by the pectoral flippers of the humpback whale, the use of spanwise waviness in the leading edge has been considered in the literature as a possible way of improving the aerodynamic performance of wings. In this paper, we present an investigation based on direct numerical simulations of the flow around infinite wavy wings with a NACA0012 profile, at a Reynolds number Re=1000Re=1000. The simulations were carried out using the Spectral/hp Element Method, with a coordinate system transformation employed to treat the waviness of the wing. Several combinations of wavelength and amplitude were considered, showing that for this value of Re the waviness leads to a reduction in the lift-to-drag ratio (L/D), associated with a suppression of the fluctuating lift coefficient. These changes are associated with a regime where the flow remains attached behind the peaks of the leading edge while there are distinct regions of flow separation behind the troughs, and a physical mechanism explaining this behaviour is proposed.
Issue Date: 17-Jan-2017
Date of Acceptance: 16-Jan-2017
URI: http://hdl.handle.net/10044/1/44058
DOI: https://dx.doi.org/10.1016/j.compfluid.2017.01.013
ISSN: 0045-7930
Publisher: Elsevier
Start Page: 117
End Page: 124
Journal / Book Title: Computers & Fluids
Volume: 146
Copyright Statement: ©2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC-BY license. ( http://creativecommons.org/licenses/by/4.0/)
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/K037536/1
Keywords: Applied Mathematics
0102 Applied Mathematics
0915 Interdisciplinary Engineering
0913 Mechanical Engineering
Publication Status: Published
Open Access location: https://dx.doi.org/10.1016/j.compfluid.2017.01.013
Appears in Collections:Faculty of Engineering
Aeronautics



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