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Oertwig, Sebastian and Siller, Henri (2025) Improving source localization with SODIX for far-field measurements in static engine noise tests. In: Numerical Methods and Experimental Means for the Integration of Future Propulsion Systems Springer Aerospace Technology, VIII. Springer International Publishing. ISBN 9783031977244. (In Press)
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Abstract
The source localization method SODIX is able to determine the contributions of individual sound sources of aircraft engines to the overall radiated noise. It has been applied to static engine noise measurements with a short-cowl turbofan engine using a far-field microphone array. The analysis of far-field microphone data is very challenging due to the low number of microphones in this array. SODIX is used to evaluate the effect of an intake liner on the sound field radiated from the engine intake. The source localization results show that SODIX is able to quantify the effect of the intake liner even when the overall sound pressure levels are dominated by other sound sources, e.g. by jet noise. A review of the mathematical formulation of SODIX shows that the point-spread function is relevant for the source localization with SODIX and has to be taken into account in the design of future measurements.
| Item URL in elib: | https://elib.dlr.de/220339/ | ||||||||||||
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| Document Type: | Book Section | ||||||||||||
| Title: | Improving source localization with SODIX for far-field measurements in static engine noise tests. | ||||||||||||
| Authors: |
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| Date: | 13 June 2025 | ||||||||||||
| Journal or Publication Title: | Numerical Methods and Experimental Means for the Integration of Future Propulsion Systems | ||||||||||||
| Refereed publication: | Yes | ||||||||||||
| Open Access: | No | ||||||||||||
| Gold Open Access: | No | ||||||||||||
| In SCOPUS: | No | ||||||||||||
| In ISI Web of Science: | No | ||||||||||||
| Volume: | VIII | ||||||||||||
| Editors: |
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| Publisher: | Springer International Publishing | ||||||||||||
| Series Name: | Springer Aerospace Technology | ||||||||||||
| ISBN: | 9783031977244 | ||||||||||||
| Status: | In Press | ||||||||||||
| Keywords: | Aeroacoustics, engine noise tests, microphones, UHBR propulsion systems | ||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
| HGF - Program: | Aeronautics | ||||||||||||
| HGF - Program Themes: | Clean Propulsion | ||||||||||||
| DLR - Research area: | Aeronautics | ||||||||||||
| DLR - Program: | L CP - Clean Propulsion | ||||||||||||
| DLR - Research theme (Project): | L - Future Engines and Engine Integration | ||||||||||||
| Location: | Berlin-Charlottenburg | ||||||||||||
| Institutes and Institutions: | Institute of Propulsion Technology > Engine Acoustic | ||||||||||||
| Deposited By: | Siller, Dr. Henri | ||||||||||||
| Deposited On: | 09 Dec 2025 12:07 | ||||||||||||
| Last Modified: | 09 Dec 2025 12:07 |
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