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Identifying The Flap Side-Edge Noise Contribution Of A Wind Turbine Blade Section With An Adaptive Trailing-Edge

Suryadi, Alexandre and Jätz, Christoph and Herr, Michaela and Seume, Jörg R. (2022) Identifying The Flap Side-Edge Noise Contribution Of A Wind Turbine Blade Section With An Adaptive Trailing-Edge. Wind Energy, pp. 1-12. Wiley. doi: 10.1002/we.2786. ISSN 1095-4244.

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Official URL: https://doi.org/10.1002/we.2786


Active trailing-edge technology is a promising application for localized load alleviation of large-diameter wind turbine rotors, accomplished using one or more control surfaces in the rotor blade's outer region. This work focuses on identifying noise contributions from the flap side-edge and the trailing edge in a laboratory condition. Measurements were conducted in the Acoustic Wind Tunnel Braunschweig (AWB) at the German Aerospace Center's (DLR) Braunschweig site. The small-scale model has a span of 1200 mm and a chord length of 300 mm. The control surface, a plain flap, has a span of 400 mm and a chord length of 90 mm. Far-field noise was measured using a phased-microphone array for various flow speeds, angles of attack and flap deflection angles. Due to the size of the model and assumed closeness of the sound sources, two noise reduction addons were installed interchangeably: trailing-edge brush and flap side-edge porous foam for sound source identification. Analysis of the far-field noise reveals that, while changes to the flap deflection angle alter the far-field noise spectra, the trailing-edge noise remains the predominant noise source at deflection angles -5° and 5°. No additional noise level was observed from the flap side-edge within the measurable frequency range at these angles. The flap side-edge noise has an increased role for frequency larger than 2 kHz for the larger flap deflection angles of -10° and 10°.

Item URL in elib:https://elib.dlr.de/189152/
Document Type:Article
Additional Information:Suryadi conducted experiments and postprocessing Jätz conducted experiments and simulations All authors contributed in the writing of the paper
Title:Identifying The Flap Side-Edge Noise Contribution Of A Wind Turbine Blade Section With An Adaptive Trailing-Edge
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Suryadi, AlexandreUNSPECIFIEDhttps://orcid.org/0000-0002-5129-5510UNSPECIFIED
Jätz, ChristophForWind/Leibniz University HannoverUNSPECIFIEDUNSPECIFIED
Herr, MichaelaUNSPECIFIEDhttps://orcid.org/0009-0000-7275-7078154899512
Seume, Jörg R.ForWind/Leibniz University Hannoverhttps://orcid.org/0000-0003-2007-7905UNSPECIFIED
Date:18 October 2022
Journal or Publication Title:Wind Energy
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 1-12
EditorsEmailEditor's ORCID iDORCID Put Code
Moriarty, PatrickUNSPECIFIEDhttps://orcid.org/0000-0001-7122-5993UNSPECIFIED
Keywords:flap side-edge nose, trailing-edge noise, active trailing edge, wind energy
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Photovoltaics and 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 > Wind Energy
Deposited By: Suryadi, Alexandre
Deposited On:01 Nov 2022 11:39
Last Modified:07 Mar 2024 18:58

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