Hennemann, Ingo und Holzäpfel, Frank (2011) Large-Eddy Simulation of Aircraft Wake Vortex Deformation and Topology. Journal of Aerospace Engineering, 25, Seiten 1336-1350. American Society of Civil Engineers. 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.
elib-URL des Eintrags: | https://elib.dlr.de/67327/ | ||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||
Titel: | Large-Eddy Simulation of Aircraft Wake Vortex Deformation and Topology | ||||||||||||
Autoren: |
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Datum: | 2011 | ||||||||||||
Erschienen in: | Journal of Aerospace Engineering | ||||||||||||
Referierte Publikation: | Ja | ||||||||||||
Open Access: | Ja | ||||||||||||
Gold Open Access: | Nein | ||||||||||||
In SCOPUS: | Ja | ||||||||||||
In ISI Web of Science: | Ja | ||||||||||||
Band: | 25 | ||||||||||||
DOI: | 10.1177/0954410011402257 | ||||||||||||
Seitenbereich: | Seiten 1336-1350 | ||||||||||||
Verlag: | American Society of Civil Engineers | ||||||||||||
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 (alt) | ||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||
DLR - Forschungsgebiet: | L AO - Luftverkehrsmanagement und Flugbetrieb | ||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Klima, Wetter und Umwelt (alt) | ||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||
Institute & Einrichtungen: | Institut für Physik der Atmosphäre > Wolkenphysik und Verkehrsmeteorologie | ||||||||||||
Hinterlegt von: | Hennemann, Ingo | ||||||||||||
Hinterlegt am: | 13 Dez 2010 12:37 | ||||||||||||
Letzte Änderung: | 31 Jul 2019 19:30 |
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