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The acoustic-particle velocity in the vicinity of a liner: a PIV-CAA comparison

Fischer, André and Bake, Friedrich and Bassetti, Alessoandro (2013) The acoustic-particle velocity in the vicinity of a liner: a PIV-CAA comparison. In: 19th AIAA/CEAS Aeroacoustics Conference . 19th AIAA/CEAS Aeroacoustics Conference (34th AIAA Aeroacoustics Conference), 27. - 29. Mai 2013, Berlin, Deutschland.

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A comparison between measurements and simulations of the acoustic-particle-velocity field in a rectangular duct in the near field of a single-degree-of-freedom, Helmholtz-resonator liner is presented. For the measurements, at low-velocity (Ma=0.01) grazing flow condition, the non-intrusive measurement technique particle-image velocimetry (PIV) is applied. The computational aeroacoustic (CAA) simulation is performed by solving the linearised Euler equations in the time domain, without background flow (Ma=0). The CAA solution uses an extended-Helmholtz-resonator acoustic-impedance model to represent the liner. A strong similarity between the simulated and the measured acoustic-particle-velocity distributions is observed. This suggests that the PIV-based technique enables the visualisation of the acoustic-velocity field, on the one hand. On the other hand, it confirms that the given acoustic-impedance model effectively simulates the response of a liner, in terms of the near-field acoustic-particle velocity.

Item URL in elib:https://elib.dlr.de/82824/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:The acoustic-particle velocity in the vicinity of a liner: a PIV-CAA comparison
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Fischer, Andréandre.fischer (at) dlr.deUNSPECIFIED
Bake, Friedrichfriedrich.bake (at) dlr.deUNSPECIFIED
Bassetti, Alessoandroalessandro.bassetti (at) dlr.deUNSPECIFIED
Date:27 May 2013
Journal or Publication Title:19th AIAA/CEAS Aeroacoustics Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:acoustic particle velocity, Helmholtz resonator liner, PIV, CAA
Event Title:19th AIAA/CEAS Aeroacoustics Conference (34th AIAA Aeroacoustics Conference)
Event Location:Berlin, Deutschland
Event Type:international Conference
Event Dates:27. - 29. Mai 2013
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: Fischer, Andre
Deposited On:19 Jun 2013 16:40
Last Modified:19 Jun 2013 16:40

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