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Experimental and numerical analysis of the transonic vortical flow over a generic lambda wing configuration

Zimper, Dirk and Rein, Martin (2014) Experimental and numerical analysis of the transonic vortical flow over a generic lambda wing configuration. In: 32nd AIAA Applied Aerodynamics Conference. American Institute of Aeronautics and Astronautics. AIAA AVIATION 2014, 16.-20. Jun. 2014, Atlanta, Georgia, USA. ISBN 978-1-62410-288-2. ISSN 2014-2005.

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Official URL: http://arc.aiaa.org/doi/abs/10.2514/6.2014-2005


Transonic flows over the generic lambda wing configuration SACCON are considered for Mach numbers in the range 0.5 ≤ M∞ ≤ 0.8. These flows are governed by an interaction of compressibility effects and vortical flows. In order to analyze the related flow physics, experimental and numerical approaches are combined. In wind tunnel tests, performed in the transonic tunnel DNW-TWG, the SACCON configuration was tested at a reduced scale of 1:20.5 at Reynolds numbers 2.1·106 ≤ Re ≤ 2.8·106. Surface oil flow visualizations provide information on separation and reattachment lines, and thus also on vortex systems on the lee side of the model. In addition, schlieren images showing vortex structures and shock waves provide a first impression of the three-dimensional flow field. Detailed information on threedimensional flow fields have been obtained from numerical simulations carried out with the DLR TAU-Code. CFD results obtained with different turbulence models have been validated by comparison with skin friction lines of surface oil flow visualizations. Based on CFD results it is shown that at higher Mach numbers the presence of supersonic flow regimes limits the propagation of information and in this manner strongly influences vortex flows on the wing. Furthermore, at high angles of attack the particular design of the SACCON configuration results in strong shock-vortex interactions. These features lead to complex flow phenomena that can affect flight characteristics of the SACCON configuration over the entire flight envelope.

Item URL in elib:https://elib.dlr.de/89700/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental and numerical analysis of the transonic vortical flow over a generic lambda wing configuration
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Zimper, Dirkdirk.zimper (at) dlr.deUNSPECIFIED
Rein, Martinmartin.rein (at) dlr.deUNSPECIFIED
Journal or Publication Title:32nd AIAA Applied Aerodynamics Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Publisher:American Institute of Aeronautics and Astronautics
Keywords:UAV, UCAV, transonic flow, aerodynamic behaviour, SACCON, Stability & Control, Vortex, Shock Wave
Event Title:AIAA AVIATION 2014
Event Location:Atlanta, Georgia, USA
Event Type:international Conference
Event Dates:16.-20. Jun. 2014
Organizer:American Institute of Aeronautics and Astronautics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies (old), L - Flight Physics (old)
Location: Göttingen , Köln-Porz
Institutes and Institutions:Program Coordination Defence & Security Research
Institute of Aerodynamics and Flow Technology
Institute of Aerodynamics and Flow Technology > Transport Aircraft
Institute of Aerodynamics and Flow Technology > High Speed Configurations
Deposited By: Zimper, Dr.-Ing. Dirk
Deposited On:03 Sep 2014 14:28
Last Modified:06 Jun 2016 14:08

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