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Experiments in Fluids
Erschienen in: Experiments in Fluids 4-5/2009

01.10.2009 | Research Article

Flow structure on a three-dimensional wing subjected to small amplitude perturbations

verfasst von: T. O. Yilmaz, Donald Rockwell

Erschienen in: Experiments in Fluids | Ausgabe 4-5/2009

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Abstract

Small amplitude angular perturbations, of the order of one-half degree, can substantially modify the flow structure along a three-dimensional wing configuration, which is quantitatively characterized using a technique of high-image-density particle image velocimetry. Excitation at either the fundamental or the first subharmonic of the spanwise-averaged instability frequency of the separating shear layer from the stationary wing nearly eliminates the large-scale separation zone along the wing at high angle of attack. The physics of the flow is interpreted in terms of time-mean streamlines, vorticity and Reynolds stress, in conjunction with phase-averaged patterns of instantaneous vorticity. Distinctive vorticity patterns occur along the leading edge when the time-averaged separation zone is minimized.
Vorheriger Artikel Volumetric correlation PIV: a new technique for 3D velocity vector field measurement
Nächster Artikel Measurements of velocity spectra using time-resolving Doppler global velocimetry with laser frequency modulation and a detector array

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Metadaten
Titel
Flow structure on a three-dimensional wing subjected to small amplitude perturbations
verfasst von
T. O. Yilmaz
Donald Rockwell
Publikationsdatum
01.10.2009
Verlag
Springer-Verlag
Erschienen in
Experiments in Fluids / Ausgabe 4-5/2009
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-009-0637-2

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