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Comparability of Microphone Array Measurements in Open and Closed Wind Tunnels

Kröber, Stefan (2014) Comparability of Microphone Array Measurements in Open and Closed Wind Tunnels. Dissertation, Technische Universität Berlin.

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Official URL: http://opus4.kobv.de/opus4-tuberlin/frontdoor/index/index/docId/4564

Abstract

The phased microphone array has become a widely used tool in aeroacoustic testing for the localization and quantification of sound sources. Measurements are often carried out in wind tunnels with open or closed test sections. The underlying thesis investigates the performance and comparability of microphone array measurements conducted in wind tunnels with open and closed test sections and carries out a systematic comparison. The various effects influencing the aeroacoustic results of testing in different wind tunnels can be summarized in three main groups. Deviations can result from influences which can affect the aeroacoustic sound generation. The second group concerns differences in the experimental setup. Finally, the third group consists of the varying test section boundary conditions and propagation effects. In the framework of the assessment of the comparability of microphone array measurements in open and closed wind tunnels, this thesis focuses on the third group - the influence of test section boundary conditions and propagation effects on microphone array results. Nonetheless, the first two points are also of concern and discussed in this thesis.

Item URL in elib:https://elib.dlr.de/86599/
Document Type:Thesis (Dissertation)
Additional Information:Promotionsausschuss: Vorsitzender: Prof. Dr.-Ing. D. Peitsch Gutachter: Prof. Dr.-Ing. W. Nitsche Gutachter: Prof. Dr. rer. nat. Dr.-Ing. habil. A. Dillmann
Title:Comparability of Microphone Array Measurements in Open and Closed Wind Tunnels
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kröber, StefanUNSPECIFIEDUNSPECIFIED
Date:2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:247
Status:Published
Keywords:beamforming, microphone arrays, aeroacoustic testing, open and closed test sections
Institution:Technische Universität Berlin
Department:Fakultät V - Verkehrs- und Maschinensysteme
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:17 Feb 2014 13:10
Last Modified:17 Feb 2014 13:10

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