Chassaing, J. C., Sayma, A. I. & 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. doi: 10.1016/j.jsv.2007.10.006
- Accepted Version
Available under License : See the attached licence file.
Download (973kB) | Preview
Text (Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International)
Download (201kB) | Preview
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.
|Additional Information:||© 2008, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/|
|Subjects:||T Technology > TA Engineering (General). Civil engineering (General)|
|Divisions:||School of Engineering & Mathematical Sciences > Engineering|
Actions (login required)
Downloads per month over past year