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Spectral analysis of the flow sound interaction at a bias flow liner

Haufe, Daniel and Schulz, Anita and Bake, Friedrich and Enghardt, Lars and Czarske, Jürgen and Fischer, Andreas (2014) Spectral analysis of the flow sound interaction at a bias flow liner. Applied Acoustics, 81, pp. 47-49. Elsevier. DOI: http://dx.doi.org/10.1016/j.apacoust.2014.02.007 ISSN 0003-682X

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Official URL: http://dx.doi.org/10.1016/j.apacoust.2014.02.007

Abstract

The interaction between the flow field and the sound field is responsible for the sound absorption at perforated acoustic liners with bias flow and has to be investigated contactlessly. Based on the optically measured flow velocity spectrum, an energy analysis was performed. As a result, the generation of broadband flow velocity fluctuations in the shear layer surrounding the bias flow caused by the flow sound interaction has been observed. In addition, the magnitude of this acoustically induced flow velocity oscillation exhibits a correlation with the acoustic dissipation coefficient of the bias flow liner. This supports the assumption that an energy transfer between the flow field and the sound field is responsible for the acoustic damping.

Item URL in elib:https://elib.dlr.de/89166/
Document Type:Article
Title:Spectral analysis of the flow sound interaction at a bias flow liner
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Haufe, DanielInstitut für Grundlagen der Elektrotechnik und Elektronik, Professur für Mess- und Prüftechnik, TU DresdenUNSPECIFIED
Schulz, AnitaInstitut für Strömungsmechanik und Technische Akustik, TU BerlinUNSPECIFIED
Bake, FriedrichDLR, AT-TRAUNSPECIFIED
Enghardt, LarsDLR, AT-TRAUNSPECIFIED
Czarske, JürgenInstitut für Grundlagen der Elektrotechnik und Elektronik, Professur für Mess- und Prüftechnik, TU DresdenUNSPECIFIED
Fischer, AndreasInstitut für Grundlagen der Elektrotechnik und Elektronik, Professur für Mess- und Prüftechnik, TU DresdenUNSPECIFIED
Date:2014
Journal or Publication Title:Applied Acoustics
Refereed publication:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:81
DOI :http://dx.doi.org/10.1016/j.apacoust.2014.02.007
Page Range:pp. 47-49
Publisher:Elsevier
ISSN:0003-682X
Status:Published
Keywords:Optical measurement Aeroacoustics Sound absorption Bias flow liner
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems (old)
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Combustion Chamber Technologies (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Bake, Dr.-Ing. Friedrich
Deposited On:19 May 2014 16:29
Last Modified:10 Jan 2019 15:51

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