Numerical Estimation of End Corrections in Extended-Duct and Perforated-Duct Mufflers-Reference-Cited by-同舟云学术

Numerical Estimation of End Corrections in Extended-Duct and Perforated-Duct Mufflers

Published:1999-07-01 Issue:3 Volume:121 Page:302-308
ISSN:1048-9002
Container-title:Journal of Vibration and Acoustics
language:en
Short-container-title:

Author:

Torregrosa A. J.¹,Broatch A.¹,Payri R.¹,Gonza´lez F.²

Affiliation:

1. CMT Dept. Ma´quinas y Motores Te´rmicos, Universidad Polite´cnica de, Valencia, Spain

2. Dept. de ingenieri´a Meca´nica y de Materiales, Universidad Polite´cnica de, Valencia, Spain

Abstract

One-dimensional models for extended-duct and perforated-duct mufflers require the introduction of end corrections in order to account for multidimensional effects at the junctions. In this paper, a numerical two-dimensional finite element calculation has been used in order to obtain information on these end corrections. The results have been validated through comparison with experimental measurements performed with a modified version of the impulse method. Then, the influence of the different geometric characteristics of the mufflers on the end correction have been studied. A general correlation in terms of relevant nondimensional parameters is given for extended-duct mufflers, whereas for perforated mufflers a general correlation has not been obtained due to the eventual coupling with other attenuation mechanisms.

Publisher

ASME International

Subject

General Engineering

Link

http://asmedigitalcollection.asme.org/vibrationacoustics/article-pdf/121/3/302/5825953/302_1.pdf

Reference26 articles.

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2. Broatch, A., 1995, Metodologi´a Experimental Para el Estudio de la Respuesta Acu´stica de Elementos Silenciadores de Motores de Combustion Interna, PhD Thesis. Universidad Polite´cnica de Valencia.

3. Davies P. O. A. L. , 1988, “Practical Flow Duct Acoustics,” Journal of Sound and Vibration, Vol. 124, pp. 91–115.

4. Dokumaci E. , 1996, “Matrizant Approach to Acoustic Analysis of Perforated Multiple Pipe Mufflers Carrying Mean Flow,” Journal of Sound and Vibration, Vol. 191, pp. 505–518.

5. Gogate G. R. , and MunjalM. L., 1995, “Analytical and Experimental Aeroacoustic Studies of Open-Ended Three-Duct Perforated Elements Used in Mufflers,” Journal of the Acoustical Society of America, Vol. 97, pp. 2919–2927.

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