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Klähn, Lukas and Caldas, Luciano and Tapken, Ulf (2022) Measurements of fan inflow distortion noise generation in a low speed fan - part II: acoustic analyses. In: 28th AIAA/CEAS Aeroacoustics Conference, 2022. 28th AIAA/CEAS Aeroacoustics 2022 Conference, 2022-06-14 - 2022-06-17, Southampton, Vereinigtes Königreich. doi: 10.2514/6.2022-2945. ISBN 978-162410664-4.
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Official URL: https://arc.aiaa.org/doi/abs/10.2514/6.2022-2945
Abstract
In a low speed fan test rig aeroacoustic measurements with different inflow distortions were conducted. The objective of the experimental study is to analyse and better understand the aerodynamic dependencies of the fan noise sources. The mean flow and turbulence characteristics of the inflow distortions are discussed in a companion paper. The present work focuses on acoustic analysis of the inflow distortions as measured with axial and azimuthal microphone arrays. The circumferential position of the axial array is discussed regarding propagation effects in non-uniform flows and turbulent wall pressure fluctuations. In the context of the non-homogeneous turbulence properties, the sound pressure and sound power spectra are interpreted with regard to the dominant broadband noise sources from rotor-stator interaction and inflow-rotor interaction.
| Item URL in elib: | https://elib.dlr.de/188891/ | ||||||||||||||||
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| Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||
| Title: | Measurements of fan inflow distortion noise generation in a low speed fan - part II: acoustic analyses | ||||||||||||||||
| Authors: |
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| Date: | 13 June 2022 | ||||||||||||||||
| Journal or Publication Title: | 28th AIAA/CEAS Aeroacoustics Conference, 2022 | ||||||||||||||||
| Refereed publication: | Yes | ||||||||||||||||
| Open Access: | No | ||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||
| In SCOPUS: | Yes | ||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||
| DOI: | 10.2514/6.2022-2945 | ||||||||||||||||
| ISBN: | 978-162410664-4 | ||||||||||||||||
| Status: | Published | ||||||||||||||||
| Keywords: | Rotor Stator InteractionsTurbulent FlowAtmospheric TurbulenceFlow SeparationDynamic PressureSound Pressure LevelRotor WakeAcoustic MeasurementMass Flow RateHoneycomb Structures | ||||||||||||||||
| Event Title: | 28th AIAA/CEAS Aeroacoustics 2022 Conference | ||||||||||||||||
| Event Location: | Southampton, Vereinigtes Königreich | ||||||||||||||||
| Event Type: | international Conference | ||||||||||||||||
| Event Start Date: | 14 June 2022 | ||||||||||||||||
| Event End Date: | 17 June 2022 | ||||||||||||||||
| Organizer: | American Institute of Aeronautics and Astronautics | ||||||||||||||||
| 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, L - Components and Emissions | ||||||||||||||||
| Location: | Berlin-Charlottenburg | ||||||||||||||||
| Institutes and Institutions: | Institute of Propulsion Technology > Engine Acoustic | ||||||||||||||||
| Deposited By: | Klähn, Lukas | ||||||||||||||||
| Deposited On: | 17 Oct 2022 08:58 | ||||||||||||||||
| Last Modified: | 24 Apr 2024 20:50 |
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