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Comparison of DLR and ISVR wave number decomposition technique

Bauers, Roland (2013) Comparison of DLR and ISVR wave number decomposition technique. DLR-Interner Bericht. DLR-IB 92517-13/B13, 9 S. (Unpublished)

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DLR and ISVR independently developed techniques for the purpose of separating hydrodynamic and acoustic signal constituents in measurements with an axial microphone array. The DLR technique implements a spatial Fourier transform and bases on the work of Arguillat and Ehrenfried [1, 2]. The work was motivated by the objective to separate the hydrodynamic perturbations from measurements of of the mean power spectral density (PSD). At the ISVR a beamformer algorithm was developed [3, 4] and utilized for the mapping of the induct-sound eld into the far eld. A brief comparison of the di erent techniques is given. The nomenclature follows the paper abstract of Brian Tester [5]. In order to retain comparability to the DLR approach, the coordinate system and the formulation for axial wave numbers was used instead of propagation angles.

Item URL in elib:https://elib.dlr.de/82850/
Document Type:Monograph (DLR-Interner Bericht)
Title:Comparison of DLR and ISVR wave number decomposition technique
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bauers, Rolandroland.bauers (at) dlr.deUNSPECIFIED
Date:May 2013
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Number of Pages:9
Keywords:Kreuzspektren Wellenzahlspektrum räumliche DFT Mikrofonmessungen Strömungskanal
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 - Turbine Technologies (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Bauers, Roland
Deposited On:20 Jun 2013 13:01
Last Modified:20 Jun 2013 13:01

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