Numerical study of sound generation by vortex induced flexible wall vibration

Ting Hui Zheng, Shiu Keung Tang, Wen Zhong Shen

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

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 languageEnglish
Title of host publication13th International Congress on Sound and Vibration 2006, ICSV 2006
Pages3305-3311
Number of pages7
Volume4
Publication statusPublished - 1 Dec 2006
Event13th International Congress on Sound and Vibration 2006, ICSV 2006 - Vienna, Austria
Duration: 2 Jul 20066 Jul 2006

Conference

Conference13th International Congress on Sound and Vibration 2006, ICSV 2006
CountryAustria
CityVienna
Period2/07/066/07/06

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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