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.
|Title:||Identification of vortex pairs in aircraft wakes from sectional velocity data|
|Journal or Publication Title:||Experiments in Fluids|
|In ISI Web of Science:||Yes|
|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|
|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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