Preliminary acoustic performance investigation of concentric-tube perforated muffler design

Authors

  • Jun Zuo University of Windsor, Dept. of Mechanical, Automotive and Materials Eng., 401 Sunset Ave., Windsor, Ont.
  • Colin Novak University of Windsor, Dept. of Mechanical, Automotive and Materials Eng., 401 Sunset Ave., Windsor, Ont.
  • Helen Ule University of Windsor, Dept. of Mechanical, Automotive and Materials Eng., 401 Sunset Ave., Windsor, Ont.
  • Ramani Ramakrishnan Ryerson University, Department of Architectural Science, 350 Victoria St., Toronto, Ont.
  • Robert Gaspar University of Windsor, Dept. of Mechanical, Automotive and Materials Eng., 401 Sunset Ave., Windsor, Ont.

Keywords:

Acoustics, Attenuation, Computer simulation, Mathematical models, Resonators, Acoustic attenuation, Perforated muffler, Transmission loss (TL)

Abstract

Two impendence models based on the theoretical and empirical results are compared using a one dimensional segmentation method to explore the differences in predicted transmission loss (TL) of a concentric-tube perforated muffler with zero mean flow. Simulations demonstrate that perforated tube mufflers have better acoustic attenuation properties than simple expansion chamber mufflers. These perforated tube elements are widely used in resonators and mufflers to attenuate exhaust system noise. The physical segmentation or simplification of the perforated tube includes the effect of perforation in each segment, which is considered as a branch with a solid tube connecting the branches of each adjoining segment. A one dimensional segment model is compared with Ricardo WAVE, a commercial software modeling package. Results show that large discrepancy in prediction of transmission loss is found between the WAVE for a large perforated muffler configuration.

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Published

2006-09-01

How to Cite

1.
Zuo J, Novak C, Ule H, Ramakrishnan R, Gaspar R. Preliminary acoustic performance investigation of concentric-tube perforated muffler design. Canadian Acoustics [Internet]. 2006 Sep. 1 [cited 2021 Oct. 28];34(3):44-5. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1814

Issue

Section

Proceedings of the Acoustics Week in Canada

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