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Prediction of trailing-edge noise for separated turbulent boundary layers

Suryadi, Alexandre (2018) Prediction of trailing-edge noise for separated turbulent boundary layers. In: Jahresbericht 2018, pp. 186-187. 21. DGLR-FAch-Symposium der STAB, 6-7 November 2018, Darmstadt, Germany.

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Official URL: https://www.sla.tu-darmstadt.de/stab_2018/stab2018_home.de.jsp

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 spec- trum in the manner of Howe’s radiation model. Surface pressure fluc- tuations 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/122941/
Document Type:Conference or Workshop Item (Speech)
Title:Prediction of trailing-edge noise for separated turbulent boundary layers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Suryadi, AlexandreAlexandre.Suryadi (at) dlr.deUNSPECIFIED
Date:November 2018
Journal or Publication Title:Jahresbericht 2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 186-187
Status:Published
Keywords:prediction model, flow separation, trailing-edge noise
Event Title:21. DGLR-FAch-Symposium der STAB
Event Location:Darmstadt, Germany
Event Type:national Conference
Event Dates:6-7 November 2018
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:10 Dec 2018 16:38
Last Modified:31 Jul 2019 20:20

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