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Klähn, Lukas and Moreau, Antoine and Caldas, Luciano and Tapken, Ulf (2022) Assessment of in-duct fan broadband noise measurements in a modern low-speed test rig. In: International Conference of Fan Noise, Aerodynamics, Applications and Systems 2022. International Conference of Fan Noise, Aerodynamics, Applications and Systems 2022, 2022-04-06, Senlis, Frankreich. doi: 10.26083/tuprints-00021709. (Submitted)
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Official URL: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21709
Abstract
The rotor-incoherent components of the sound field emitted by a fan stage in an aeroacoustic fan test rig are analyzed by means of a radial mode analysis with a combined axial and azimuthal sensor array. The resulting sound power is separated into broadband components and narrowband components around the blade passing frequencies, which are not to be confused with pure tones. The trends of the broadband components are linked to the blade loading and flow coefficient. The narrowband components, that are associated with elongated ingested turbulence, are reduced by a honeycomb. Measurements are compared to simulated data obtained from a physics based analytical noise prediction model and to results obtained for a different test rig.
| Item URL in elib: | https://elib.dlr.de/193955/ | ||||||||||||||||||||
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| Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||
| Title: | Assessment of in-duct fan broadband noise measurements in a modern low-speed test rig | ||||||||||||||||||||
| Authors: |
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| Date: | 2022 | ||||||||||||||||||||
| Journal or Publication Title: | International Conference of Fan Noise, Aerodynamics, Applications and Systems 2022 | ||||||||||||||||||||
| Refereed publication: | No | ||||||||||||||||||||
| Open Access: | Yes | ||||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||||
| In SCOPUS: | No | ||||||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||||||
| DOI: | 10.26083/tuprints-00021709 | ||||||||||||||||||||
| Status: | Submitted | ||||||||||||||||||||
| Keywords: | Fan noise, test rig, noise prediction method, rotor-incoherent noise, broadband noise, turbulence | ||||||||||||||||||||
| Event Title: | International Conference of Fan Noise, Aerodynamics, Applications and Systems 2022 | ||||||||||||||||||||
| Event Location: | Senlis, Frankreich | ||||||||||||||||||||
| Event Type: | international Conference | ||||||||||||||||||||
| Event Date: | 6 April 2022 | ||||||||||||||||||||
| 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 | ||||||||||||||||||||
| Deposited By: | Klähn, Lukas | ||||||||||||||||||||
| Deposited On: | 20 Feb 2023 09:03 | ||||||||||||||||||||
| Last Modified: | 24 Apr 2024 20:54 |
Available Versions of this Item
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Assessment of in-duct fan broadband noise measurements in a modern low-speed test rig. (deposited 05 Jan 2022 15:27)
- Assessment of in-duct fan broadband noise measurements in a modern low-speed test rig. (deposited 20 Feb 2023 09:03) [Currently Displayed]
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