Performance Analysis of Annular Passive Silencers – An Update
Résumé
One dimensional analysis of the performance of annular silencers containing porous absorbers was presented in early 1990s. The impact of the perforated covering of the porous materials was not included in the earlier results. The multi-physics software, COMSOL, can handle three dimensional propagation as well as the effect of perforated sheets. Six simple annular silencers which were tested using ATM standard test procedures were used in a two-D and three-D models developed in the multi-physics simulation software. The impact of the perforated sheet was also included in the simulations. The predicted results were compared to the test data. The main aim of the current investigation is create updated versions of design curves for performance evaluations of passive silencers. The comparison results are presented in this paper.
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