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Acoustic Resonances in Rectangular Open Cavities

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.

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:
AuthorsInstitution or Email of Authors
Koch, W.UNSPECIFIED
Date:2004
Journal or Publication Title:10th AIAA/CEAS Aeroacoustics Conference
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Volume:43
Page Range:pp. 2342-2349
Editors:
EditorsEmail
AIAA, UNSPECIFIED
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: elib DLR-Beauftragter
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 19:26

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