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Kröber, Stefan and Hellmold, Marius and Koop, Lars (2013) Experimental Investigation of Spectral Broadening of Sound Waves by Wind Tunnel Shear Layers. American Institute of Aeronautics and Astronautics. 19th AIAA/CEAS Aeroacoustics Conference (34th AIAA Aeroacoustics Conference), 2013-05-27 - 2013-05-29, Berlin, Germany. doi: 10.2514/6.2013-2255.
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Official URL: http://arc.aiaa.org | DOI: 10.2514/6.2013-2255
Abstract
A detailed experimental investigation of the phenomenon of spectral broadening of monochromatic sound waves by wind tunnel shear layers is presented. The determination of the broadening characteristics as a function of aerodynamic (flow velocity and shear layer characteristics) and acoustic (source and receiver positions, tone frequency) properties is performed in a wind tunnel using two different sound source concepts. The performance of each sound source concept and their equivalence for examining experimentally the effect of spectral broadening is evaluated. The magnitude of the tone broadening by the shear layer was quantified as function of the dimensionless scattering parameter. Furthermore a simple approach for the identification of broadened spectral components of tone spectra is presented and its possibilities and limitations are evaluated in detail.
| Item URL in elib: | https://elib.dlr.de/82451/ | ||||||||||||||||
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| Document Type: | Conference or Workshop Item (Speech, Paper) | ||||||||||||||||
| Additional Information: | DOI: 10.2514/6.2013-2255 | ||||||||||||||||
| Title: | Experimental Investigation of Spectral Broadening of Sound Waves by Wind Tunnel Shear Layers | ||||||||||||||||
| Authors: |
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| Date: | 2013 | ||||||||||||||||
| Refereed publication: | No | ||||||||||||||||
| Open Access: | No | ||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||
| In SCOPUS: | No | ||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||
| DOI: | 10.2514/6.2013-2255 | ||||||||||||||||
| Page Range: | pp. 1-17 | ||||||||||||||||
| Publisher: | American Institute of Aeronautics and Astronautics | ||||||||||||||||
| Series Name: | Conference Proceedings online | ||||||||||||||||
| Status: | Published | ||||||||||||||||
| Keywords: | shear layer, spectral broadening of sound waves, aeroacoustic testing, open test section | ||||||||||||||||
| Event Title: | 19th AIAA/CEAS Aeroacoustics Conference (34th AIAA Aeroacoustics Conference) | ||||||||||||||||
| Event Location: | Berlin, Germany | ||||||||||||||||
| Event Type: | international Conference | ||||||||||||||||
| Event Start Date: | 27 May 2013 | ||||||||||||||||
| Event End Date: | 29 May 2013 | ||||||||||||||||
| Organizer: | The American Institute of Aeronautics and Astronautics (AIAA) | ||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||
| HGF - Program: | Aeronautics | ||||||||||||||||
| HGF - Program Themes: | Aircraft Research (old) | ||||||||||||||||
| DLR - Research area: | Aeronautics | ||||||||||||||||
| DLR - Program: | L AR - Aircraft Research | ||||||||||||||||
| DLR - Research theme (Project): | L - Simulation & Validation (old) | ||||||||||||||||
| Location: | Göttingen | ||||||||||||||||
| Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Experimental Methods | ||||||||||||||||
| Deposited By: | Micknaus, Ilka | ||||||||||||||||
| Deposited On: | 22 Aug 2013 13:37 | ||||||||||||||||
| Last Modified: | 24 Apr 2024 19:48 |
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