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Control of leading-edge vortices on non-slender delta wings

Rein, Martin and Höhler, Gebhard (2011) Control of leading-edge vortices on non-slender delta wings. 82nd Annual Meeting of the International Association of Applied Mathematics and Mechanic, 18.-21. April 2011 , Graz, Österreich.

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Abstract

Wind tunnel experiments were conducted in order to investigate the effectiveness of flow control devices on a non-slender delta wing. Main objective of testing was to determine the effect on the rolling moment of different modifications of the left leading edge. As a clean configuration a flat delta wing model with round leading edges and a sweep angle of L = 53° was used. Tests were conducted in the open test section of a low-speed atmospheric wind tunnel at Reynolds numbers Re = 0.3M - 1.2M. The angle of attack was varied from a = 0° to 34°. Various modifications and actuators were tested. These include a flat bar projecting out of the round leading edge (static and oscillating) and a rotatable cylinder having a straight edge milled into its surface (replacing the round leading edge). Forces and moments were obtained by a 6-component strain gauge and surface flow topologies by oil flow visualization. In certain cases also the vortical flow field above the surface was visualized by smoke. Results obtained with the various flow control configurations will be presented and discussed.

Document Type:Conference or Workshop Item (Speech)
Title:Control of leading-edge vortices on non-slender delta wings
Authors:
AuthorsInstitution or Email of Authors
Rein, MartinUNSPECIFIED
Höhler, GebhardUNSPECIFIED
Date:2011
Status:Published
Keywords:flow control, leading edge, non-slender delta wing, vortical flow
Event Title:82nd Annual Meeting of the International Association of Applied Mathematics and Mechanic
Event Location:Graz, Österreich
Event Type:international Conference
Event Dates:18.-21. April 2011
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Institute of Aerodynamics and Flow Technology > High Speed Configurations
Deposited By: Kristina Danzer
Deposited On:19 Apr 2012 11:42
Last Modified:19 Apr 2012 11:42

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