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Localization and far field extrapolation of acoustic sources from wind tunnel experiments for jet engine installation noise

Siller, Henri A. and Oertwig, Sebastian (2018) Localization and far field extrapolation of acoustic sources from wind tunnel experiments for jet engine installation noise. In: 24th AIAA/CEAS Aeroacoustics Conference. American Institute of Aeronautics and Astronautics, Atlanta, Georgia. 24th AIAA/CEAS Aeroacoustics Conference, 25.06.-29.06.2018, Atlanta, Georgia, USA. DOI: 10.2514/6.2018-3294 ISBN 978-162410560-9

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Official URL: https://doi.org/10.2514/6.2018-3294


The SODIX method for the localization of directive sound sources was used to analyze experimental data from measurements with a model dual jet installed under a wing. The experiments were performed in the framework of the EU project Jeronimo by the French aeronautics, space and defense research lab ONERA in the CEPRA19 aeroacoustic wind tunnel. The dual-jet nozzle was mounted in the free jet that is used to simulate the flight stream in the anechoic chamber. A wing with a high-lift system could be installed above the nozzle. Acoustic data were acquired with a far-field arc of microphones and a microphone array in the near-field of the jet. SODIX was used to compute the source distribution along the jet axis from the microphone array data. The sound field generated by this source distribution was extrapolated to the positions of far-field microphones, showing good agreement between both data sets. This demonstrates that the SODIX method can be applied to wind tunnel tests at model scale in order to estimate the sound power levels of the individual sources of the jet and on the wing and determine the directivity of the sound field at far-field positions

Item URL in elib:https://elib.dlr.de/125980/
Document Type:Conference or Workshop Item (Speech)
Additional Information:https://doi.org/10.2514/6.2018-3294
Title:Localization and far field extrapolation of acoustic sources from wind tunnel experiments for jet engine installation noise
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Journal or Publication Title:24th AIAA/CEAS Aeroacoustics Conference
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.2514/6.2018-3294
Publisher:American Institute of Aeronautics and Astronautics
Keywords:acoustic source localisation jet noise installation microphone array SODIX farfield extrapolation
Event Title:24th AIAA/CEAS Aeroacoustics Conference
Event Location:Atlanta, Georgia, USA
Event Type:international Conference
Event Dates:25.06.-29.06.2018
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 - Virtual Engine and Validation methods
Location: Berlin-Charlottenburg
Institutes and Institutions:Institute of Propulsion Technology > Engine Acoustic
Deposited By: Siller, Henri
Deposited On:21 Jan 2019 09:40
Last Modified:21 Jan 2019 09:40

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