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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Serson, D. ; Meneghini, J. R. ; Sherwin, S. J.
Total Authors: 3
Document type: Journal article
Source: COMPUTERS & FLUIDS; v. 146, p. 117-124, MAR 26 2017.
Web of Science Citations: 6

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 = 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 (LID), 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. (C) 2017 The Authors. Published by Elsevier Ltd. (AU)

FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
Grantee:Julio Romano Meneghini
Support type: Research Grants - Research Centers in Engineering Program
FAPESP's process: 12/23493-0 - Numerical study of wings with wavy leading and trailing edges
Grantee:Douglas Serson
Support type: Scholarships in Brazil - Doctorate (Direct)