A combined time and frequency domain approach for acoustic resonance prediction

Chassaing, J C, Sayma, A I and Imregun, M (2008) A combined time and frequency domain approach for acoustic resonance prediction. Journal of Sound and Vibration, 311 (3-5). pp. 1100-1113. ISSN 0022-460X

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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.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Naser Sayma
Date Deposited: 06 Feb 2012 18:15
Last Modified: 29 Mar 2012 11:18
URI: http://sro.sussex.ac.uk/id/eprint/15495
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