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Theoretical modelling of wakes from retractable flapping wings in forward flight

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Author(s): Ben Parslew | William J. Crowther

Journal: PeerJ
ISSN 2167-8359

Volume: 1;
Start page: e105;
Date: 2013;
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Keywords: Aerodynamics | Wake | Bird | Flapping | Particle image velocimetry | Vortex | Animal flight

ABSTRACT
A free-wake method is used to simulate the wake from retractable, jointed wings. The method serves to complement existing experimental studies that visualise flying animal wakes. Simulated wakes are shown to be numerically convergent for a case study of the Rock Pigeon in minimum power cruising flight. The free-wake model is robust in simulating wakes for a range of wing geometries and dynamics without requiring changes to the numerical method. The method is found to be useful for providing low order predictions of wake geometries. However, it is not well suited to reconstructing 3d flowfields as solutions are sensitive to the numerical mesh node locations.

Tango Jona
Tangokurs Rapperswil-Jona

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