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Experimental Study on Noise Reduction through Trailing-Edge Brushes

Herr, Michaela (2006) Experimental Study on Noise Reduction through Trailing-Edge Brushes. Springer Verlag, Berlin-Heidelberg-New York. ISBN 3-540-33286-3

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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<sup>6</sup>). 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 10 dB, 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.

Item URL in elib:https://elib.dlr.de/47783/
Document Type:Article
Additional Information:Presented at the 14th DGLR-Symposium of STAB, ZARM/University of Bremen, 16–18 Nov. 2004
Title:Experimental Study on Noise Reduction through Trailing-Edge Brushes
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Herr, MichaelaUNSPECIFIEDUNSPECIFIED
Date:2006
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:92
Page Range:pp. 365-372
Editors:
EditorsEmail
Rath, Hans-JosefUNSPECIFIED
Holze, CarstenUNSPECIFIED
Heinemann, Hans-JoachimUNSPECIFIED
Henke, RolfUNSPECIFIED
Hönlinger, HeinzUNSPECIFIED
Publisher:Springer Verlag, Berlin-Heidelberg-New York
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISBN:3-540-33286-3
Status:Published
Keywords:Trailing-Edge Noise, Noise Reduction, Trailing-Edge Brushes
HGF - Research field:Aeronautics, Space and Transport
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: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Herr, Michaela
Deposited On:24 Apr 2007
Last Modified:22 Jan 2018 16:50

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