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Prediction of Trailing-Edge Noise for Separated Turbulent Boundary Layers

Suryadi, Alexandre (2019) Prediction of Trailing-Edge Noise for Separated Turbulent Boundary Layers. In: 21st STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics, 142, pp. 769-779. Springer, Cham. 21st STAB/DGLR Symposium, 6-7 Nov 2018, Darmstadt, Germany. DOI: 10.1007/978-3-030-25253-3_73 ISBN 978-3-030-25252-6 ISSN 1612-2909

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Official URL: https://doi.org/10.1007/978-3-030-25253-3_73

Abstract

This paper presents a semi-empirical low-order prediction of the trailing-edge noise of separated turbulent boundary layers. The prediction focuses on obtaining the low-frequency spectral peak of the far-field sound pressure level by modeling the measured wavenumber-frequency spectrum using regression analysis and integrating that spectrum in the manner of Howe's radiation model. Surface pressure fluctuations upstream of the trailing-edge of a DU96-W-180 blade section were measured using miniature pressure transducers, and the trailing-edge noise was measured using a directional microphone. The prediction showed that the far-field sound pressure level reached its maximum below the frequency limit of the directional microphone measurement, between 400 Hz-500 Hz depending on the freestream velocity and the predicted spectrum varied between +/-0.5 dB given the inaccuracies of the regression model.

Item URL in elib:https://elib.dlr.de/129640/
Document Type:Conference or Workshop Item (Speech)
Title:Prediction of Trailing-Edge Noise for Separated Turbulent Boundary Layers
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Suryadi, AlexandreAlexandre.Suryadi (at) dlr.dehttps://orcid.org/0000-0002-5129-5510
Date:27 September 2019
Journal or Publication Title:21st STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:142
DOI :10.1007/978-3-030-25253-3_73
Page Range:pp. 769-779
Editors:
EditorsEmailEditor's ORCID iD
Dillmann, AndreasDLR GöttingenUNSPECIFIED
Heller, GerdAirbus Operations GmbHUNSPECIFIED
Krämer, EwaldUniversität StuttgartUNSPECIFIED
Wagner, ClausDLR GöttingenUNSPECIFIED
Tropea, CameronTU DarmstadtUNSPECIFIED
Jakirlic, SuadTU DarmstadtUNSPECIFIED
Publisher:Springer, Cham
Series Name:Notes on Numerical Fluid Mechanics and Multidisciplinary Design
ISSN:1612-2909
ISBN:978-3-030-25252-6
Status:Published
Keywords:turbulent boundary layer,flow separation,noise prediction
Event Title:21st STAB/DGLR Symposium
Event Location:Darmstadt, Germany
Event Type:national Conference
Event Dates:6-7 Nov 2018
Organizer:Technische Universität Darmstadt
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
Deposited By: Suryadi, Alexandre
Deposited On:19 Mar 2020 08:18
Last Modified:28 Sep 2020 03:00

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