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Acoustic Analysis and Design of Short Elliptical End-Chamber Mufflers

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Feldname	Details
Vorliegende Sprache	eng
ISBN	978-981-10-4827-2
ISBN	978-981-10-4829-6
Name	Mimani, Akhilesh ¬[VerfasserIn]¬
T I T E L	Acoustic Analysis and Design of Short Elliptical End-Chamber Mufflers
Auflage	1st ed. 2021.
Verlagsort	Singapore
Verlagsort	Singapore
Verlag	Springer Singapore
Verlag	Imprint: Springer
Erscheinungsjahr	2021
	2021
	2021
Umfang	1 Online-Ressource(XIII, 153 p. 81 illus., 78 illus. in color.)
Titelhinweis	Erscheint auch als (Druck-Ausgabe)ISBN: 978-981-10-4827-2
Titelhinweis	Erscheint auch als (Druck-Ausgabe)ISBN: 978-981-10-4829-6
ISBN	ISBN 978-981-10-4828-9
Klassifikation	TRC
	TEC009090
	629.2
Kurzbeschreibung	Introduction -- Solution of the Helmholtz equation in the Elliptical Cylindrical Co-ordinates -- Characterization of an Elliptical/Circular Cylindrical Chamber Muffler -- Analysis and Design of Long Chamber Mufflers -- Double-Tuning the Short Chamber Mufflers: Design for Broadband Attenuation -- Summary of Contribution and Directions for Future Work.
2. Kurzbeschreibung	This book presents a three-dimensional analysis of acoustic wave propagation in an elliptical waveguide, and applies the equations and concepts to design axially short elliptical end-chamber muffler configurations which are an important component of a complex multi-pass muffler used in a modern-day automotive exhaust system. A general solution of the Helmholtz equation in elliptical cylindrical co-ordinates is presented in terms of the Mathieu and modified Mathieu modal functions. This is followed by the tabulation and analysis, for the first time, of the non-dimensional resonance frequencies of the transverse modes of a rigid-wall elliptical waveguide for a complete range of aspect ratio. The modal shape patterns of the first few circumferential, radial and cross-modes are examined with particular attention to the pressure nodal ellipses and hyperbolae. An analytical formulation is then outlined for characterizing a single-inlet and single-outlet elliptical muffler with the inlet located on the end face and the outlet located either on the end face or side-surface. The ensuing chapter is devoted toward analyzing the Transmission Loss (TL) performance of different short end-chamber mufflers, namely (a) the straight-flow configuration having ports located on the opposite face, (b) the flow-reversal configuration with ports located on the same end face and (c) configuration with inlet port on the end face and outlet on the side surface. Design guidelines are formulated in terms of the optimal location of inlet and outlet ports which suppresses the deteriorating influence of certain higher-order modes, thereby delivering a broadband TL performance. Directions for future work are discussed toward the end. In summary, this book is a one-stop solution for a practicing automotive engineer designing mufflers, for an applied mathematician studying wave propagation in elliptical geometries, and also as a niche area within noise control engineering. .
SWB-Titel-Idn	1750019523
Signatur	Springer E-Book
Bemerkungen	Elektronischer Volltext - Campuslizenz
Elektronische Adresse	$uhttps://doi.org/10.1007/978-981-10-4828-9
Internetseite / Link	Resolving-System

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