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Holzäpfel, Frank und Misaka, Takashi und Hennemann, Ingo (2010) Wake-Vortex Topology, Circulation, and Turbulent Exchange Processes. AIAA Atmospheric and Space Environments Conference, 2-5 Aug 2010, Toronto, Ontario, Canada.
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Kurzfassung
Large eddy simulations of aircraft wake vortex evolution in various turbulent and stably stratified atmospheric environments have been conducted with two different LES codes. Passive tracers are used to investigate exchange processes between the vortex cores, the vortex oval and its environment as well as redistribution processes along the vortex tubes. A post processing method is employed to identify the vortex center lines even in progressed states of vortex decay where the coherent vortex structure is getting lost. This method allows, for example, analyzing the circulation evolution of vortex rings, establishing statistics of vortex deformation, and revealing the mechanisms of the vortex bursting phenomenon. Vortex bursting is related to the collision of secondary vorticity structures propagating along the vortex lines. In neutrally and weakly stratified environments long-living vortex rings are observed where circulation decay proceeds in three phases. During the initial diffusion phase vortex decay may depend on integral turbulence length scales. On average, the detrainment of a passive tracer from the primary vortices is correlated with circulation decay.
| elib-URL des Eintrags: | https://elib.dlr.de/65075/ | ||||||||||||||||
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| Dokumentart: | Konferenzbeitrag (Vorlesung, Paper) | ||||||||||||||||
| Titel: | Wake-Vortex Topology, Circulation, and Turbulent Exchange Processes | ||||||||||||||||
| Autoren: |
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| Datum: | August 2010 | ||||||||||||||||
| Referierte Publikation: | Ja | ||||||||||||||||
| Open Access: | Nein | ||||||||||||||||
| Gold Open Access: | Nein | ||||||||||||||||
| In SCOPUS: | Nein | ||||||||||||||||
| In ISI Web of Science: | Nein | ||||||||||||||||
| Seitenbereich: | Seiten 1-16 | ||||||||||||||||
| Herausgeber: |
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| Name der Reihe: | AIAA Paper 2010-7992 | ||||||||||||||||
| Status: | veröffentlicht | ||||||||||||||||
| Stichwörter: | wake vortex, vortex rings, vortex topology, circulation, three-phase decay, turbulent mixing, vortex bursting | ||||||||||||||||
| Veranstaltungstitel: | AIAA Atmospheric and Space Environments Conference | ||||||||||||||||
| Veranstaltungsort: | Toronto, Ontario, Canada | ||||||||||||||||
| Veranstaltungsart: | internationale Konferenz | ||||||||||||||||
| Veranstaltungsdatum: | 2-5 Aug 2010 | ||||||||||||||||
| Veranstalter : | American Institute of Aeronautics and Astronautics | ||||||||||||||||
| HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||
| HGF - Programm: | Luftfahrt | ||||||||||||||||
| HGF - Programmthema: | L VU - Luftverkehr und Umwelt (alt) | ||||||||||||||||
| DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||
| DLR - Forschungsgebiet: | L VU - Luftverkehr und Umwelt | ||||||||||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | L - Wirbelschleppen (alt) | ||||||||||||||||
| Standort: | Oberpfaffenhofen | ||||||||||||||||
| Institute & Einrichtungen: | Institut für Physik der Atmosphäre > Wolkenphysik und Verkehrsmeteorologie | ||||||||||||||||
| Hinterlegt von: | Holzäpfel, Dr. habil. Frank | ||||||||||||||||
| Hinterlegt am: | 15 Sep 2010 11:03 | ||||||||||||||||
| Letzte Änderung: | 24 Sep 2012 12:04 |
Verfügbare Versionen dieses Eintrags
- Wake-Vortex Topology, Circulation, and Turbulent Exchange Processes. (deposited 15 Sep 2010 11:03) [Gegenwärtig angezeigt]
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