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Active Control of Leading Edge Flow Separation for a Swept High-Lift Airfoil

Hühne, Claus-Philipp and Scholz, Peter and Radespiel, Rolf and Wild, Jochen and Ciobaca, Vlad (2012) Active Control of Leading Edge Flow Separation for a Swept High-Lift Airfoil. Deutscher Luft- und Raumfahrtkongress 2012, 10.-12. Sept. 2012, Berlin.

Full text not available from this repository.

Abstract

This paper presents an active flow control swept wing experiment. The wind tunnel measurements were conducted with a two-element airfoil in high-lift configuration at Reynolds numbers of 1.9M and 2.5M and a corresponding Mach number of 0.14 and 0.18. Previous 2D wind tunnel experiments revealed a significant benefit of the AFC system. Based on this results an investigation with a swept wing (Λ=30°) was carried out to determinate the influence of a 3D boundary layer to the AFC system. The investigation was performed in the low speed wind tunnel DNW-NWB1 at Braunschweig, Germany. The AFC system was located close to the attachment line on the pressure side and consists of co-rotation vortex generator jets to suppress the leading edge stall at the airfoil. The jets can be run either in “static” mode or as dynamically pulsed jets. The AFC system used solenoid fast switch vales with can run with reasonable high frequencies up to F+=12. The measurements allow to determinate the effects of frequency and momentum coefficient on the swept wing. The results show that the AFC system can increase the maximum lift. It seems to be that the actuation frequency and momentum coefficient have a significant influence to the performance of the system. For all cases dynamic blowing is noticeably more effective than constant blowing.

Item URL in elib:https://elib.dlr.de/80232/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Active Control of Leading Edge Flow Separation for a Swept High-Lift Airfoil
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hühne, Claus-PhilippTU-BS, ISMUNSPECIFIED
Scholz, PeterTU-BS, ISMUNSPECIFIED
Radespiel, RolfTU-BS, ISMUNSPECIFIED
Wild, JochenDLR AS-TFUNSPECIFIED
Ciobaca, VladDLR AS-TFUNSPECIFIED
Date:September 2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Active Flow Control, Fluidic Vortex Generator
Event Title:Deutscher Luft- und Raumfahrtkongress 2012
Event Location:Berlin
Event Type:national Conference
Event Dates:10.-12. Sept. 2012
Organizer:DGLR
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Wild, Dr.-Ing. Jochen
Deposited On:08 Jan 2013 09:09
Last Modified:08 Jan 2013 09:09

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