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Effect of Ground Obstacle of Different Aspect Ratio on Wake Vortex Dissipation (Invited)

Wang, Chung Hung J. and Zhao, Dan and Schlüter, Jörg and Holzäpfel, Frank and Stephan, Anton (2016) Effect of Ground Obstacle of Different Aspect Ratio on Wake Vortex Dissipation (Invited). In: 8th AIAA Atmospheric and Space Environments Conference (3134). 8th AIAA Atmospheric and Space Environments Conference, 13.-17. Juni 2016, Washington, D.C.. DOI: 10.2514/6.2016-3134

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Official URL: http://dx.doi.org/10.2514/6.2016-3134


The employment of obstacles to accelerate dissipation of aircraft wake vortex near ground was proposed by DLR, with several subsequent studies on the effect of the obstacles under different atmospheric conditions. In collaboration with DLR, the NTU research team employed large eddy simulation to study the effect of obstacle shape on the dissipation rate and propagation speed of vortex breakup. Simulation results have shown that while the shape of the obstacle influences the propagation speed of vortex breakup, the flow-facing area of the obstacles is the major contributing factor deciding the magnitude of circulation reduction on top of the obstacle. The current study aims to investigate the effect of the aspect ratio of obstacle on vortex dissipation while holding the biggest contributor to reduction of circulation, form drag from the obstacle projected area, constant. Our simulation data has shown that, with every other parameter remained constant, the aspect ratio of obstacle makes negligible difference to the dissipation rate of wake vortex. The result suggested that the height of the obstacle could be further reduced into a less intrusive profi le and lessen the impact of these obstacles on airport operations.

Item URL in elib:https://elib.dlr.de/107473/
Document Type:Conference or Workshop Item (Speech)
Title:Effect of Ground Obstacle of Different Aspect Ratio on Wake Vortex Dissipation (Invited)
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wang, Chung Hung J.ATMRI, SingaporeUNSPECIFIED
Schlüter, JörgDeakin Univ. Melbourne, AustraliaUNSPECIFIED
Journal or Publication Title:8th AIAA Atmospheric and Space Environments Conference
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.2514/6.2016-3134
Keywords:Wake vortex, large eddy simulation, plate line, obstacle shape
Event Title:8th AIAA Atmospheric and Space Environments Conference
Event Location:Washington, D.C.
Event Type:international Conference
Event Dates:13.-17. Juni 2016
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Deposited By: Ziegele, Brigitte
Deposited On:14 Nov 2016 11:42
Last Modified:14 Nov 2016 11:42

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