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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


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
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
Journal or Publication Title:New Results in Numerical and Experimental Fluid Mechanics XI
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Page Range:pp. 611-621
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
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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