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Experimental Study On Noise Reduction Through Trailing Edge Brushes

Herr, M. (2004) Experimental Study On Noise Reduction Through Trailing Edge Brushes. Notes on Numerical Fluid Mechanics and Multidisciplinary Design. Springer Verlag. (In Press)

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Abstract

Within an experimental trailing edge noise reduction study in the Aeroacoustic Wind Tunnel Braunschweig (AWB) both acoustic and aerodynamic effects of trailing edge brush devices were examined. Directional microphone and hot wire measurements were undertaken on a zero-lift generic plate model (Re = 2.1 to 7.9 x 10 Million). Various brush concepts were tested to clarify the functional relationship between design parameters and the ensuing aeroacoustic properties. First results of this ongoing work indicate a significant source noise reduction in excess of 10db, thereby revealing two relevant noise reduction mechanisms. In addition to broadband turbulent boundary layer trailing edge noise also narrow band contributions due to vortex shedding from the edge were alleviated.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2005,
Title:Experimental Study On Noise Reduction Through Trailing Edge Brushes
Authors:
AuthorsInstitution or Email of Authors
Herr, M.UNSPECIFIED
Date:2004
Journal or Publication Title:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
Refereed publication:Yes
In ISI Web of Science:Yes
Publisher:Springer Verlag
Status:In Press
Keywords:Trailing Edge Noise Reduction, Brush Devices
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Quiet Air Traffic (old)
Location: Köln-Porz , Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology
Deposited By: Claudia Grant
Deposited On:11 Jan 2006
Last Modified:14 Jan 2010 19:46

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