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Noise Reduction Technologies for Wind Turbines

Herr, Michaela and Ewert, Roland and Faßmann, Benjamin and Rautmann, Christof and Martens, Susanne and Rohardt, Claas-Hinrik and Suryadi, Alexandre (2017) Noise Reduction Technologies for Wind Turbines. In: New Results in Numerical and Experimental Fluid Mechanics XI, 136, pp. 611-621. Springer International Publishing. 20. DGLR/STAB Symposium, 8.-9.11.2016, Braunschweig, Deutschland. ISBN 978-3-319-64518-6 ISSN 1612-2909

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Official URL: http://www.springer.com/de/book/9783319645186

Abstract

Results from a numerical and experimental aeroacoustic assessment of 2D wind turbine blade sections are presented. CFD/CAA-based predictions using a synthetic turbulence method were conducted at a NACA 64-618 profile as well as at a new low-noise airfoil design RoH-W-18%c37. Validation experiments were performed in DLR's Acoustic Wind-Tunnel Braunschweig (AWB) for varying transition locations. A trailing-edge noise reduction benefit of 2-4 dB in overall sound pressure level was predicted for the new airfoil under design conditions. A large laminar extent of the boundary layer significantly reduces the noise emission (by up to 8~dB) compared to equivalent cases with forced transition at the leading edge. An additional noise reduction (with realistic reductions of the peak levels by 4-6 dB) was accomplished by flow-permeable trailing-edge extensions which were successfully transferred to the two profiles from forerunner aerospace-related studies.

Item URL in elib:https://elib.dlr.de/118642/
Document Type:Conference or Workshop Item (Speech)
Title:Noise Reduction Technologies for Wind Turbines
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Herr, MichaelaMichaela.Herr (at) dlr.deUNSPECIFIED
Ewert, Rolandroland.ewert (at) dlr.deUNSPECIFIED
Faßmann, Benjaminbenjamin.fassmann (at) dlr.deUNSPECIFIED
Rautmann, Christofchristof.rautmann (at) dlr.deUNSPECIFIED
Martens, SusanneSusanne.Martens (at) dlr.deUNSPECIFIED
Rohardt, Claas-Hinrikclaas-hinrik.rohardt (at) dlr.deUNSPECIFIED
Suryadi, AlexandreAlexandre.Suryadi (at) dlr.deUNSPECIFIED
Date:2017
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics XI
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:136
Page Range:pp. 611-621
Editors:
EditorsEmail
Dillmann, AndreasDLR Göttingen
Heller, GerdAirbus Bremen
Krämer, EwaldUni Stuttgart
Wagner, ClausDLR Göttingen
Bansmer, StephanTU Braunschweig
Radespiel, RolfTU Braunschweig
Semaan, RichardTU Braunschweig
Publisher:Springer International Publishing
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-319-64518-6
Status:Published
Keywords:wind energy, flow-induced sound, aeroacoustics, trailing-edge noise, Acoustic Wind-Tunnel Braunschweig, AWB, BMWi-project BELARWEA
Event Title:20. DGLR/STAB Symposium
Event Location:Braunschweig, Deutschland
Event Type:national Conference
Event Dates:8.-9.11.2016
Organizer:Deutsche Strömungsmechanische Arbeitsgemeinschaft
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Wind Energy
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Wind Energy
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Technical Acoustics
Institute for Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Seyfried, Beate
Deposited On:31 Jan 2018 14:29
Last Modified:02 Mar 2018 12:22

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