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Control of Leading-Edge Flow Separation from Airfoils by Acoustic Excitation

Grosche, F.-R. and Koslov, V.V. and Dovgal, A.V. (1994) Control of Leading-Edge Flow Separation from Airfoils by Acoustic Excitation. International Conference "Flow Acoustics, a Technological Audit", 11-14 July 1994, Lyon, France.

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Abstract

Since several years experiments are carried out at DLR Goettingen to investigate the feasibility of controlling the laminar- turbulent boundary layer transition by means of periodic, in particular acoustic, excitation of the unstable laminar boundary layer. Similar techniques can be applied to diminish the flow separation from airfoils or to shift the onset of separation to higher angles of incidence. Work on this problem has been carried out by V.V. Kozlov and A.V. Dovgal of ITAM Novosibirsk in cooperation with the first author during their stay at Goettingen as guest scientists. The paper concern mainly windtunnel experiments on the control of three-dimensional separation from a wing by external acoustic excitation.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=1994, pages=2,
Title:Control of Leading-Edge Flow Separation from Airfoils by Acoustic Excitation
Authors:
AuthorsInstitution or Email of Authors
Grosche, F.-R.UNSPECIFIED
Koslov, V.V.UNSPECIFIED
Dovgal, A.V.UNSPECIFIED
Date:1994
Status:Published
Keywords:Dynamic Flow Control, Leading edge flow separation, acoustic excitation of shear layers, active separation control, wings of finite aspect ratio
Event Title:International Conference "Flow Acoustics, a Technological Audit", 11-14 July 1994, Lyon, France
HGF - Research field:UNSPECIFIED
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:L ST - Starrflüglertechnologien
DLR - Research theme (Project):UNSPECIFIED
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Institut für Strömungsmechanik > Institut für Experimentelle Strömungsmechanik
Deposited By: elib DLR-Beauftragter
Deposited On:03 Apr 2006
Last Modified:27 Apr 2009 10:08

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