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A combined time and frequency domain approach for acoustic resonance prediction

journal contribution
posted on 2023-06-07, 19:24 authored by J C Chassaing, A I Sayma, M Imregun
A general hybrid time- and frequency-domain methodology has been developed to identify acoustic resonance conditions of internal flow configurations. The acoustic modes are determined by imposing onto the flow a time-dependent excitation at several locations on the boundary. The resulting time-domain pressure responses, which are computed via an unsteady Favre-Reynolds averaged Navier-Stokes solver, are used to determine the frequency response function matrix of the fluid which can be considered to be a multiple-input multiple-output system. The main test case was selected to be a closed-end cylindrical duct for which the effect of different excitation techniques on the predicted acoustic modes is discussed in detail. The last test case deals with the acoustic characterization of a 2-D channel with symmetric bumps and an inlet flow velocity of 17 m s- 1. It is shown that the methodology was suitable for identifying axial and transverse acoustic modes up to 3 kHz. 2007 Elsevier Ltd. All rights reserved.

History

Publication status

  • Published

Journal

Journal of Sound and Vibration

ISSN

0022-460X

Issue

3-5

Volume

311

Page range

1100-1113

Pages

14.0

Department affiliated with

  • Engineering and Design Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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