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An Analysis of Vortex Breakdown Predicted by the Euler Equations.

Strohmeyer, D. and Orlowski, M. and Longo, J.M.A. and Hummel, D. and Bergmann, A. (1996) An Analysis of Vortex Breakdown Predicted by the Euler Equations. In: Proceedings of the 20th Cobgress of the ICAS, 8-13 September 1996, Sorrento, Italy. 20th Congress of the International Council of the Aeronautical Sciences, 8.-13.9.96, Sorrento, Italy.

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Abstract

In the present paper a numerical/experimental investigation is presented to address the ability of the solution of the Euler equations to describe spiral-type vortex breakdown for sharp-edged delta wings. The configuration selected is a 65 degrees swept, cropped delta wing with and without canard. The investigation is carried out at M* &#61 0.2 for two angles of attack, alpha &#61 10 degrees and 20 degrees. The experimental results include water and wind tunnel flow investigations, while the numerical study is carried out with the CEVCATS code using a structured grid with about 1 million points. The influence of artificial viscosity and grid topology on the numerical solution is investigated. Although the implemented numerical scheme is formulated to provide steady-state solutions and hence not time accurate, to results clearly demonstrate the ability of this technique to describe spiral-type vortex breakdown.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1996, pages=12,
Title:An Analysis of Vortex Breakdown Predicted by the Euler Equations.
Authors:
AuthorsInstitution or Email of Authors
Strohmeyer, D.UNSPECIFIED
Orlowski, M.UNSPECIFIED
Longo, J.M.A.UNSPECIFIED
Hummel, D.UNSPECIFIED
Bergmann, A.UNSPECIFIED
Date:1996
Journal or Publication Title:Proceedings of the 20th Cobgress of the ICAS, 8-13 September 1996, Sorrento, Italy
Status:Published
Keywords:Vortex Flow, Delta Wing, Numerical Simulation, Vortex Breakdown, Vortex Stretching
Event Title:20th Congress of the International Council of the Aeronautical Sciences, 8.-13.9.96, Sorrento, Italy
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):L - Military Technologies
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Entwurfsaerodynamik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:06

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