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Large-Eddy Simulation of Aircraft Wake Vortex Deformation and Topology

Hennemann, Ingo und Holzäpfel, Frank (2011) Large-Eddy Simulation of Aircraft Wake Vortex Deformation and Topology. Journal of Aerospace Engineering, 25, Seiten 1336-1350. DOI: 10.1177/0954410011402257.

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Kurzfassung

On the one hand, it is known from visual observations, Lidar measurements, and numerical simulations that aircraft wake vortices may live significantly longer than anticipated by todays standard regulations of air traffic control. On the other hand, the initially counter-rotating, parallel vortex pair deforms quickly, which reduces the impact time of adverse forces and moments on encountering aircraft. Therefore, Large-Eddy simulations of wake vortex evolution in different meteorological conditions are conducted in order to analyse the physics of vortex deformation. A new post-processing algorithm has been developed that at first determines the three-dimensional path of the vortex core line and then computes piecewise curvature radii as a measure of vortex deformation. It is found that larger turbulence levels and neutral to weakly stable temperature stratification particularly support vortex ring formation. The vortex ring regime is characterised by a reduced descent rate and by a surprising variability of its core radius. It is shown that the varying core size directly affects the evolution of radii-averaged circulation. Comparisons with field experiments indicate good agreement with the considerable life time of the vortex rings and topology.

Dokumentart:Zeitschriftenbeitrag
Titel:Large-Eddy Simulation of Aircraft Wake Vortex Deformation and Topology
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Hennemann, Ingoingo.hennemann@dlr.de
Holzäpfel, Frankfrank.holzaepfel@dlr.de
Datum:2011
Erschienen in:Journal of Aerospace Engineering
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:25
DOI :10.1177/0954410011402257
Seitenbereich:Seiten 1336-1350
Status:veröffentlicht
Stichwörter:wake vortex, circulation, deformation, curvature radius, linking, turbulent length scales, baroclinic vorticity
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:ATM und Flugbetrieb
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AO - Luftverkehrsmanagement und Flugbetrieb
DLR - Teilgebiet (Projekt, Vorhaben):L - Klima, Wetter und Umwelt
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Wolkenphysik und Verkehrsmeteorologie
Hinterlegt von: Ingo Hennemann
Hinterlegt am:13 Dez 2010 12:37
Letzte Änderung:12 Dez 2013 21:09

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