MATRIZANT APPROACH TO ACOUSTIC ANALYSIS OF PERFORATED MULTIPLE PIPE MUFFLERS CARRYING MEAN FLOW

✍ Scribed by E. Dokumaci

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 485 KB
• Volume: 191
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1996.0137

✦ Synopsis

A new method based on the matrizant theory is developed for acoustic analysis of perforated pipe muffler components. The analysis is presented in a generality encompassing any number of parallel pipes that communicate along a common length. The utility and potential of the method is demonstrated on a plug muffler and a reverse flow muffler. The analysis shows, for the first time, that the distributed parameter theory of plane wave propagation in a perforated pipe provides a more satisfactory setting than the segmentation method for the analysis of the effects of axially varying quantities such as the mean flow velocity. The effect of the mean flow velocity gradient on the transmission loss of the plug and reversed flow mufflers are computed and are shown to be insignificant for practical purposes.