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research article

Characterizing a burst leading-edge vortex on a rotating flat plate wing

Jones, Anya R.
•
Medina, Albert
•
Spooner, Hannah
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2016
Experiments in Fluids

Identifying, characterizing, and tracking incoherent vortices in highly separated flows is of interest for the development of new low-order models for unsteady lift prediction. The current work examines several methods to identify vortex burst and characterize a burst leading-edge vortex. Time-resolved stereoscopic PIV was performed on a rotating flat plate wing at Re = 2500. The burst process was found to occur at mid-span and is characterized by axial flow reversal, the entrainment of opposite-sign vorticity, and a rapid expansion of vortex size. A POD analysis revealed that variations in certain mode coefficients are indicative of the flow state changes characteristics of burst. During burst, the leading-edge vortex evolves to a region of inhomogeneous vorticity distributed over a large area. Several methods of defining the vortex size and circulation are evaluated and a combination of these can be used to characterize the leading-edge vortex both pre- and post-burst.

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Type
research article
DOI
10.1007/s00348-016-2143-7
Web of Science ID

WOS:000372866000008

Author(s)
Jones, Anya R.
Medina, Albert
Spooner, Hannah
Mulleners, Karen
Date Issued

2016

Publisher

Springer

Published in
Experiments in Fluids
Volume

57

Issue

4

Start page

1

End page

16

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
UNFOLD  
Available on Infoscience
April 28, 2016
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/125935
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