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Experiments in Fluids

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01.01.2008 | Research Article

Aerodynamic characteristics of flapping motion in hover

verfasst von: D. F. Kurtulus, L. David, A. Farcy, N. Alemdaroglu

Erschienen in: Experiments in Fluids | Ausgabe 1/2008

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Abstract

The aim of the present work is to understand the aerodynamic phenomena and the vortex topology of an unsteady flapping motion by means of numerical and experimental methods. Instead of the use of real insect/bird wing geometries and kinematics which are highly complex and difficult to imitate by an exact modeling, a simplified model is used in order to understand the unsteady aerodynamics and vortex formation mechanisms during the different phases of the flapping motion. The flow is assumed to be laminar with a Reynolds number of 1,000. Direct numerical simulations, laser sheet visualizations and particle image velocimetry (PIV) measurements are performed for the phenomenological analysis of the flow. The vortex dynamics and their identification are put in evidence with PIV measurements by considering velocity magnitude, streamlines, second invariant of velocity gradient (Q-criteria), vorticity contours and Eurlerian accelerations.

Vorheriger Artikel Subsonic jet aeroacoustics: associating experiment, modelling and simulation

Nächster Artikel A turbulent boundary layer over a two-dimensional rough wall

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Titel: Aerodynamic characteristics of flapping motion in hover
verfasst von: D. F. Kurtulus
L. David
A. Farcy
N. Alemdaroglu
Publikationsdatum: 01.01.2008
Verlag: Springer-Verlag
Erschienen in: Experiments in Fluids / Ausgabe 1/2008
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI: https://doi.org/10.1007/s00348-007-0369-0

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