Numerical Analysis of Parallel Perforated Single-Inlet and Double-Outlet Mufflers Using the Transfer Function
Resource
Acta Acustica united with Acustica, 96(3), 445-451
Journal
Acta Acustica united with Acustica
Pages
445-451
Date Issued
2010
Date
2010
Author(s)
Wu, Chien-Ho
Abstract
The purpose of this study is to investigate the acoustic performance of single-inlet/double-outlet mufflers. The four-pole parameter representation has been widely established in the literature but this technique is limited to the study of single-inlet/single-outlet mufflers. For more comprehensive investigation, the transfer function is used in this work and is utilized to predict the performance of mufflers with double outlets. Parallel perforated mufflers with or without absorbent material have been investigated in this study. Several parameters are taken into account in this work, for example: the flow resistivity of absorbent material, the porosity of perforated ducts, and the perforated chamber radius. The numerical results via the transfer function have been compared with analytical approaches based on pressure and velocity continuity as well as the modal meshing approach. The results clearly show that the agreements are good.
Type
journal article