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Low-Noise Technologies for Wind Turbine Blades

Herr, Michaela and Ewert, Roland and Faßmann, Benjamin and Rautmann, Christof and Martens, Susanne and Rohardt, Claas-Hinrik and Suryadi, Alexandre (2016) Low-Noise Technologies for Wind Turbine Blades. WindEurope Tech Workshop, Wind Turbine Sound 2016, 17.-18. November 2016, Danzig, Polen.

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Abstract

The BMWi-funded wind energy project BELARWEA aims at the development and validation of improved methods to support the design of both efficient and low-noise wind turbine rotors. Aeroacoustically driven 2D profile design, 3D winglet design and 2D/3D CFD and CAA analysis are supplemented by the transfer of passive noise reduction technologies from aerospace applications to wind turbine blades. Based on a down-scaled version of the open source NREL-5-MW reference rotor, a noise reduction of at least 3 dB at a given rotor performance is targeted by a dedicated 3D redesign of the outer 20% of the rotor radius. Experimental demonstration and tool validation shall be provided in systematic validation steps, i.e. • at 2D blade sections in the AWB acoustic wind-tunnel of DLR and • at 3D blade tips in the larger acoustic facility DNW-NWB, operated by the German-Dutch Wind-Tunnels Foundation. The presentation provides in its first part an overall project overview. In its second part results from the first set of AWB measurements are summarized, yielding a detailed matrix of the relevant system parameters (i.e. aerodynamic performance vs. noise). Aeroacoustic predictions are compared with the experimental results and transposed to full scale conditions. In addition, the noise reduction potential of selected trailing-edge add-ons is evaluated at varying test velocities, angles of attack and boundary-layer transition regions.

Item URL in elib:https://elib.dlr.de/109601/
Document Type:Conference or Workshop Item (Speech)
Title:Low-Noise Technologies for Wind Turbine Blades
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:17 November 2016
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Trailing-Edge Noise Measurements, CAA Predictions, FRPM, Low-Noise Design and Retrofit, Trailing-Edge Noise, Noise Reduction Technology, Serrations, Brushes, Wind Turbine Noise
Event Title:WindEurope Tech Workshop, Wind Turbine Sound 2016
Event Location:Danzig, Polen
Event Type:Workshop
Event Dates:17.-18. November 2016
Organizer:WinEurope (ehemals EWEA)
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
Institute of Aerodynamics and Flow Technology > Transport Aircraft
Deposited By: Herr, Michaela
Deposited On:15 Dec 2016 10:32
Last Modified:31 Jul 2019 20:06

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