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Comparative Noise Measurements at Serrated and Porous Trailing-Edge Modifications

Herr, Michaela and Suryadi, Alexandre and Martens, Susanne (2016) Comparative Noise Measurements at Serrated and Porous Trailing-Edge Modifications. Serration Technology on Airfoil: Unsteady Aerodynamic and Aeroacoustics, 17.-21. Oktober 2016, Leiden, Niederlande.

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Abstract

The presentation summarizes the outcome from recent measurements in the Acoustic Wind-Tunnel Braunschweig (AWB), conducted within the framework of the German wind energy project BELARWEA. Several modifications of the trailing-edge region of two different 2D airfoils were acoustically evaluated. The noise reduction potential of slotted, microperforated and serrated trailing-edge modifications are compared at varying test velocities, angles of attack and boundary-layer transition regions. The limitations of current trailing edge noise measurement setups are discussed in depth and a tentative interpretation of noise reduction mechanisms of serrations vs. alternative noise reduction technologies is provided.

Item URL in elib:https://elib.dlr.de/109600/
Document Type:Conference or Workshop Item (Speech)
Title:Comparative Noise Measurements at Serrated and Porous Trailing-Edge Modifications
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Herr, Michaelamichaela.herr (at) dlr.deUNSPECIFIED
Suryadi, AlexandreAlexandre.Suryadi (at) dlr.deUNSPECIFIED
Martens, SusanneLeibnitz Universität Hannover, TFDUNSPECIFIED
Date:17 October 2016
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Trailing-Edge Noise Measurements, Trailing-Edge Noise, Noise Reduction Technology, Serrations, Brushes, Wind Turbine Noise
Event Title:Serration Technology on Airfoil: Unsteady Aerodynamic and Aeroacoustics
Event Location:Leiden, Niederlande
Event Type:Workshop
Event Dates:17.-21. Oktober 2016
Organizer:Lorentz Center, Leiden
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:other
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Wind Energy (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Herr, Michaela
Deposited On:15 Dec 2016 10:41
Last Modified:15 Dec 2016 10:41

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