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Emulation of Sound Pressure Level Spectra Based on Numerical Data

Faßmann, Benjamin and Herr, Michaela and Ewert, Roland and Delfs, Jan Werner (2019) Emulation of Sound Pressure Level Spectra Based on Numerical Data. In: 21st STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics, 142, pp. 739-748. Springer, Cham. 21st STAB/DGLR Symposium, 06.-07.11.2018, Darmstadt, Germany. DOI: 10.1007/978-3-030-25253-3_70 ISBN 978-3-030-25252-6 ISSN 1612-2909

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Official URL: https://link.springer.com/chapter/10.1007/978-3-030-25253-3_70

Abstract

A largely non-empirical method is presented for the prediction of the total sound emission of a wind turbine. The method is based on acoustic 2D high-fidelity simulations providing sound spectra and directivity functions. The computational effort is limited to a finite number of pre-computed flow conditions, stored to an aeroacoustic catalogue. Currently, the catalogue is consisting of pre-computed aeroacoustic results of independent computations for different airfoils, representative angles of attack, and characteristic flow conditions. Making use of these data, the sound emission of single blade elements is estimated. The suggested method allows for a representation of all operational conditions along the acoustically relevant part of the outer 25% of the rotor blade. The method is verified at certain test conditions. It is applied to angles of attack and hybrid airfoil geometries not originally included in the catalogue.

Item URL in elib:https://elib.dlr.de/132043/
Document Type:Conference or Workshop Item (Speech)
Title:Emulation of Sound Pressure Level Spectra Based on Numerical Data
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Faßmann, BenjaminBenjamin.Fassmann (at) dlr.deUNSPECIFIED
Herr, MichaelaMichaela.Herr (at) dlr.deUNSPECIFIED
Ewert, RolandRoland.Ewert (at) dlr.deUNSPECIFIED
Delfs, Jan WernerJan.Delfs (at) dlr.deUNSPECIFIED
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:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:142
DOI :10.1007/978-3-030-25253-3_70
Page Range:pp. 739-748
Editors:
EditorsEmailEditor's ORCID iD
Dillmann, A.UNSPECIFIEDUNSPECIFIED
Heller, G.UNSPECIFIEDUNSPECIFIED
Krämer, E.UNSPECIFIEDUNSPECIFIED
Wagner, C.UNSPECIFIEDUNSPECIFIED
Tropea, C.UNSPECIFIEDUNSPECIFIED
Jakirlić, S.UNSPECIFIEDUNSPECIFIED
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:wind-turbine noise, noise prediction, overall turbine Sound, trailing-edge noise, numerical prediction, CFD, CAA, FRPM
Event Title:21st STAB/DGLR Symposium
Event Location:Darmstadt, Germany
Event Type:international Conference
Event Dates:06.-07.11.2018
Organizer:Deutsche Gesellschaft für Luft- und Raumfahrt, DGLR
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: Herr, Michaela
Deposited On:09 Dec 2019 15:25
Last Modified:26 Mar 2020 07:57

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