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Separation of Tonal and Broadband Noise Components by Cyclostationary Analysis of the Modal Sound Field in a Low-Speed Fan Test Rig

Behn, Maximilian and Pardowitz, Benjamin and Tapken, Ulf (2018) Separation of Tonal and Broadband Noise Components by Cyclostationary Analysis of the Modal Sound Field in a Low-Speed Fan Test Rig. fan2018 International Conference on Fan Noise, Aerodynamics, Applications and Systems, 18.-20. Apr. 2018, Darmstadt, Deutschland.

Full text not available from this repository.

Official URL: http://www.fan2018.org/gb/paper.cfm?id=43&download

Abstract

The radial mode analysis is a well-established method used to analyze the tonal and broadband components of in-duct sound fields radiated from axial turbomachinery. Based on the cyclostationary analysis, a separation procedure is presented in order to obtain the signals associated with the tonal and broadband sound fields separately. The analysis of experimental data shows that the sound power and the mode coherences of the respective sound field components are identified exactly. Furthermore, the cyclostationary analysis is used to track the development of the sound power as a function of the rotor rotation angle at the blade passing frequencies, exemplarily.

Item URL in elib:https://elib.dlr.de/126162/
Document Type:Conference or Workshop Item (Speech)
Title:Separation of Tonal and Broadband Noise Components by Cyclostationary Analysis of the Modal Sound Field in a Low-Speed Fan Test Rig
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Behn, MaximilianMaximilian.Behn (at) dlr.dehttps://orcid.org/0000-0001-8478-8269
Pardowitz, BenjaminBenjamin.Pardowitz (at) dlr.deUNSPECIFIED
Tapken, Ulfulf.tapken (at) dlr.deUNSPECIFIED
Date:19 April 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Mode Analysis, Fan broadband noise, Fan tonal noise, cyclostationary analysis, Wigner-Ville-spectrum
Event Title:fan2018 International Conference on Fan Noise, Aerodynamics, Applications and Systems
Event Location:Darmstadt, Deutschland
Event Type:international Conference
Event Dates:18.-20. Apr. 2018
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Fan and Compressor Technologies, L - Turbine Technologies
Location: Berlin-Charlottenburg
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Behn, Maximilian
Deposited On:24 Jan 2019 09:08
Last Modified:24 Jan 2019 09:08

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