Abstract
A numerical viscous/inviscid coupling approach for the calculation of an acoustic field is applied to the case of sound radiation due to unsteady interaction between an inviscid vortex (which models a turbulent eddy) and a finite length flexible boundary. Based on the unsteady hydrodynamic information from the known incompressible flowfield, the perturbed compressible acoustic terms are calculated. Calculated results are compared with analytical solutions obtained by the method of matched asymptotic expansions. Results suggest that the monopole field created by the volumetric flow induced by the vibration flexible boundary dominates the overall acoustic power radiation. The longitudinal dipole directly due to the transverse vortex acceleration is only important when the vortex is moving over the flexible boundary. This investigation verified the applicability of the viscous/inviseid approach to flow structure-acoustic interaction and it is possible to expand the current research to the complicated interaction between flow turbulence and sound in a duct silencer, therefore, to provide information on the future development of low self-noise and efficient duct silencers.
| Original language | English |
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| Title of host publication | 13th International Congress on Sound and Vibration 2006, ICSV 2006 |
| Pages | 3305-3311 |
| Number of pages | 7 |
| Volume | 4 |
| Publication status | Published - 1 Dec 2006 |
| Event | 13th International Congress on Sound and Vibration 2006, ICSV 2006 - Vienna, Austria Duration: 2 Jul 2006 → 6 Jul 2006 |
Conference
| Conference | 13th International Congress on Sound and Vibration 2006, ICSV 2006 |
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| Country/Territory | Austria |
| City | Vienna |
| Period | 2/07/06 → 6/07/06 |
ASJC Scopus subject areas
- Acoustics and Ultrasonics