Koch, W. (2004) Acoustic Resonances in Rectangular Open Cavities. In: 10th AIAA/CEAS Aeroacoustics Conference, 43 (11), pp. 2342-2349. 10th AIAA/CEAS Aeroacoustics Conference, 2004-05-10 - 2004-05-12, Manchester, UK.
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Abstract
Acoustic resonances are computed numerically in rectangular two-dimensional deep and shallow open cavities. Unconfined cavities as well as cavities confined in a two-dimensional infinitely long duct are considered. Due to radiation losses these resonances are in general complex valued. All computations are made for zero mean flow. Perfectly Matched Layer (PML) absorbing boundary conditions are employed to avoid unphysical reflections at the necessarily finite grid boundaries. In confined cavities a few resonant modes, so-called trapped modes, exist with zero radiation losses, and significant differences are observed between confined and unconfined cavity resonances. A comparison with the frequencies of the modes observed by Rossiter suggests that the dominant Rossiter modes lock onto resonant cavity frequencies.
Item URL in elib: | https://elib.dlr.de/12752/ | ||||||
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Document Type: | Conference or Workshop Item (Speech, Paper) | ||||||
Additional Information: | LIDO-Berichtsjahr=2004, monograph_id=AIAA Paper 2004-2843, | ||||||
Title: | Acoustic Resonances in Rectangular Open Cavities | ||||||
Authors: |
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Date: | 2004 | ||||||
Journal or Publication Title: | 10th AIAA/CEAS Aeroacoustics Conference | ||||||
Refereed publication: | No | ||||||
Open Access: | No | ||||||
Gold Open Access: | No | ||||||
In SCOPUS: | No | ||||||
In ISI Web of Science: | No | ||||||
Volume: | 43 | ||||||
Page Range: | pp. 2342-2349 | ||||||
Editors: |
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Status: | Published | ||||||
Keywords: | acoustic resonances, open cavities | ||||||
Event Title: | 10th AIAA/CEAS Aeroacoustics Conference | ||||||
Event Location: | Manchester, UK | ||||||
Event Type: | international Conference | ||||||
Event Dates: | 2004-05-10 - 2004-05-12 | ||||||
Organizer: | AIAA/CEAS | ||||||
HGF - Research field: | Aeronautics, Space and Transport (old) | ||||||
HGF - Program: | Aeronautics | ||||||
HGF - Program Themes: | L VU - Air Traffic and Environment (old) | ||||||
DLR - Research area: | Aeronautics | ||||||
DLR - Program: | L VU - Air Traffic and Environment | ||||||
DLR - Research theme (Project): | L - Quiet Air Traffic (old) | ||||||
Location: | Köln-Porz , Braunschweig , Göttingen | ||||||
Institutes and Institutions: | Institute of Aerodynamics and Flow Technology | ||||||
Deposited By: | DLR-Beauftragter, elib | ||||||
Deposited On: | 16 Sep 2005 | ||||||
Last Modified: | 14 Jan 2010 19:26 |
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