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Experimental and Numerical Analysis of a Streamwise Vortex Downstream of a Delta Wing

Landa, Tim and Klug, Lorenz and Radespiel, Rolf and Probst, Silvia and Knopp, Tobias (2018) Experimental and Numerical Analysis of a Streamwise Vortex Downstream of a Delta Wing. In: 48th AIAA Fluid Dynamics Conference. 48th Fluid Dynamics Conference 2018, AIAA AVIATION Forum, (AIAA 2018-4157), 25.-29. Jun. 2018, Atlanta, USA. doi: 10.2514/6.2018-4157. ISBN 978-162410553-1. ISSN 2018-4157.

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Official URL: https://arc.aiaa.org/doi/10.2514/6.2018-4157


The present paper analyzes the vortical flow downstream of a delta wing. The Delta wing is designed to generate a vortex which resembles the vortex of a nacelle strake. The experimental results of stereo-PIV measurements performed at different positions downstream of the delta wing display the streamwise development of the vortex. The distributions of the mean axial and tangential velocity components and Reynolds-stresses characterize the vortex development. In addition, results of numerical simulations with the DLR TAU-code applying the Menter-SST eddy viscosity model and the SSG/LRR-Omega Reynolds-Stress model show the ability of the turbulence models to capture the vortex development. The experimental results indicate a preservation of the vortex strength and structure downstream of the delta wing. The Menter-SST model does not predict this preservation, rather it computes a rapid decay of the vortex strength and an increase of the vortex size. In contrast, the results of the SSG/LRR-Omega model are in good Agreement with the experiments concerning the mean flow development. However, turbulence in the vortex core is underpredicted by both turbulence models.

Item URL in elib:https://elib.dlr.de/121858/
Document Type:Conference or Workshop Item (Speech)
Title:Experimental and Numerical Analysis of a Streamwise Vortex Downstream of a Delta Wing
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Landa, TimTU BraunschweigUNSPECIFIED
Klug, LorenzTU BraunschweigUNSPECIFIED
Radespiel, RolfTU BraunschweigUNSPECIFIED
Probst, Silviasilvia.probst (at) dlr.deUNSPECIFIED
Knopp, Tobiastobias.knopp (at) dlr.deUNSPECIFIED
Journal or Publication Title:48th AIAA Fluid Dynamics Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.2514/6.2018-4157
Keywords:Delta Wing, Strake Vortex, CFD, Experiment,vwind tunnel Experiment; PIV; RSM
Event Title:48th Fluid Dynamics Conference 2018, AIAA AVIATION Forum, (AIAA 2018-4157)
Event Location:Atlanta, USA
Event Type:international Conference
Event Dates:25.-29. Jun. 2018
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 - Simulation and Validation (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, GO
Deposited By: Probst, Dr. Silvia
Deposited On:07 Nov 2018 15:16
Last Modified:09 Jan 2019 02:11

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