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6 - Multi-Modal Sound Propagation in Ducts

Published online by Cambridge University Press:  11 May 2021

Erkan Dokumacı
Erkan Dokumacı
Affiliation:
Dokuz Eylül University
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Summary

Chapter 6 introduces the three-dimensional analytic theory of sound propagation in ducts and presents acoustic models of hard-walled and lined uniform ducts. Also discussed are the effects of gradual cross-section non-uniformity, circular curvature of the duct axis, and sheared and vortical mean flows.

Keywords

transverse modesevanescent modesleast attenuated modecut-on frequencyspinning modeslined ductscurved ductsshear flow rotational flowtemperature gradient
Type
Chapter
Information
Duct Acoustics
Fundamentals and Applications to Mufflers and Silencers
 , pp. 238 - 325
Publisher: Cambridge University Press
Print publication year: 2021

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