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Optimal Design of Side-Inlet/Side-Outlet Expansion Mufflers with Open-Ended Perforated Tubes Using Simulated Annealing

Published online by Cambridge University Press:  07 December 2011

M.-C. Chiu  and
Y.-C. Chang
M.-C. Chiu*
Affiliation:
Department of Mechanical and Automation Engineering, Chung Chou University of Science and Technology, Changhua, Taiwan 51060, R.O.C.
Y.-C. Chang
Affiliation:
Department of Mechanical Engineering, Tatung University, Taipei, Taiwan 10452, R.O.C.
*
*Associate Professor, corresponding author
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Abstract

Research on new techniques of multi-chamber mufflers equipped with a side inlet and internal nonperforated intruding tubes has been discussed in recent literature; however, the research work of multichamber mufflers in conjunction with side inlet and open-ended perforated intruding tubes which may efficiently increase the acoustical performance has been neglected. Therefore, the main purpose of this paper is to optimize the best design shape of multi-chamber side mufflers with open-ended perforated intruding tubes within a limited space.

In this paper, the four-pole system matrix in evaluating the acoustic performance is also deduced in conjunction with a simulated algorithm (SA). Results reveal that the maximum sound transmission loss (STL) is precisely located at the desired target tone. In addition, the acoustical performance of mufflers conjugated with perforated intruding tubes is superior to those equipped with non-perforated tubes. Additionally, the noise reduction ability for a three-chamber side muffler with a non-perforated intruding tube and a two-chamber side muffler with perforated intruding tubes are equivalent. Moreover, mufflers with more chambers will increase the acoustic performance for both pure tone and broadband noise.

Keywords

Open-ended perforated intruding tubeDecoupled numerical methodSpace constraintsSimulated annealing algorithm.
Type
Articles
Information
Journal of Mechanics , Volume 27 , Issue 4 , December 2011 , pp. 533 - 544
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2011

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