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Identification of vortex pairs in aircraft wakes from sectional velocity data

Carmer, Carl F. v. and Konrath, Robert and Schröder, Andreas and Monnier, Jean-Claude (2008) Identification of vortex pairs in aircraft wakes from sectional velocity data. Experiments in Fluids, Vol. 44 (3), pp. 367-380. Springer Verlag Heidelberg, Berlin, New York. DOI: 10.1007/s00348-007-0450-8. ISSN 0723-4864 (print), 1432-1114 (online).

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The dynamics of multiple–vortex wake systems behind aircraft endangering air traffic can be assessed also from physical modelling. Large-scale laboratory investigations of multiple–vortex systems have been performed in a free–flight laboratory and in a water towing tank. Specialized PIV measurements provide time-resolved flow velocity fields normal to the wake axis. The applicability of various ∇u-based vortex identification schemes to planar velocity data is addressed and demonstrated for unequal-strength co- and counter-rotating vortex pairs. Large vortices shed off the wing tips and flaps are identified employing a ∇-based criterion. Their cooperative mechanisms of generation and decay are evidenced from iso-surfaces of squared swirling strength and from further characteristic vortex parameters.

Document Type:Article
Title:Identification of vortex pairs in aircraft wakes from sectional velocity data
AuthorsInstitution or Email of Authors
Carmer, Carl F. v.UNSPECIFIED
Konrath, RobertUNSPECIFIED
Schröder, AndreasUNSPECIFIED
Monnier, Jean-ClaudeONERA, France
Journal or Publication Title:Experiments in Fluids
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:Vol. 44
Page Range:pp. 367-380
Publisher:Springer Verlag Heidelberg, Berlin, New York
ISSN:0723-4864 (print), 1432-1114 (online)
Keywords:vortex identification, wake vortices, coherent structures, piv
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Ilka Micknaus
Deposited On:24 Apr 2008
Last Modified:27 Apr 2009 13:27

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