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Aircraft Wake-Vortex Decey in Ground Proximity - Physical Mechanisms and Artificial Enhancement.

Stephan, Anton and Holzäpfel, Frank and Misaka, Takashi (2013) Aircraft Wake-Vortex Decey in Ground Proximity - Physical Mechanisms and Artificial Enhancement. Journal of Aircraft, 50 (4), pp. 1250-1260. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.C032179 ISSN 0021-8669

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Official URL: http://arc.aiaa.org/doi/pdf/10.2514/1.C032179

Abstract

Aircraft wake-vortex evolution in ground proximity is investigated numerically by means of large-eddy simulations. The simulations are performed either with a flat ground or with different modifications to the ground surface to trigger rapid vortex decay. The impact of environmental turbulence in terms of turbulent wind is taken into account, where wall-resolved and wall-modeled large-eddy simulation are performed for low- and high-Reynoldsnumber cases, respectively. To understand wake-vortex decay mechanisms in ground proximity, the interaction of primary and secondary vortices is carefully investigated. We find that vortex decay can be initiated at an earlier time and substantially accelerated with obstacles at the ground. We explain the fundamental vortex dynamics describing five characteristics of the phenomenon and quantify the decay. We demonstrate that similar effects can be achieved, employing relatively small plate lines as opposed to the original large block-shaped barriers. The obstacles trigger two kinds of so-called end effects: pressure disturbances propagating within the vortex cores and secondary vortex structures propagating along the outside of the vortex cores.

Item URL in elib:https://elib.dlr.de/83419/
Document Type:Article
Title:Aircraft Wake-Vortex Decey in Ground Proximity - Physical Mechanisms and Artificial Enhancement.
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Stephan, Antonanton.stephan (at) dlr.deUNSPECIFIED
Holzäpfel, Frankfrank.holzaepfel (at) dlr.deUNSPECIFIED
Misaka, TakashiTakashi.Misaka (at) dlr.deUNSPECIFIED
Date:2013
Journal or Publication Title:Journal of Aircraft
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:50
DOI :10.2514/1.C032179
Page Range:pp. 1250-1260
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0021-8669
Status:Published
Keywords:wake-vortex, large-eddy simulations, ground proximity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Ziegele, Brigitte
Deposited On:15 Jul 2013 15:06
Last Modified:31 Jul 2019 19:41

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