Acoustic analysis and design of short elliptical end-chamber mufflers / Akhilesh Mimani.
Mimani, Akhilesh, author.
2021
TJ762.E93
Available Online

Linked e-resources

Linked Resource Online Access
Concurrent users Unlimited
Authorized users Authorized users
Document Delivery Supplied Can lend chapters, not whole ebooks

Details

Title Acoustic analysis and design of short elliptical end-chamber mufflers / Akhilesh Mimani.
Author Mimani, Akhilesh, author.
ISBN 9789811048289 (electronic book)
9811048282 (electronic book)
9789811048272 (print)
9811048274
9789811048296 (print)
9811048290
DOI https://doi.org/10.1007/978-981-10-4828-9
Published Singapore : Springer, [2021]
Language English
Description 1 online resource (xiii, 153 pages) : illustrations (some color)
Other Standard Identifiers 10.1007/978-981-10-4828-9 doi
Call Number TJ762.E93
Dewey Decimal Classification 629.25
Summary 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.
Bibliography, etc. Note Includes bibliographical references and index.
Access Note Access limited to authorized users.
Digital File Characteristics text file
PDF
Source of Description Online resource; title from PDF title page (SpringerLink, viewed March 17, 2021).
Available in Other Form Print version: 9789811048272
Print version: 9789811048296
Linked Resources Online Access
Record Appears in Online Resources > Ebooks
All Resources
Introduction
Acoustic Wave Propagation in an Elliptical Cylindrical Waveguide
Characterization of an Elliptical Chamber Muffler
Double-Tuned Short End-Chamber Mufflers
Summary of Contribution and Directions for Future Work.

Browse Subjects

Show more subjects...

Statistics

from
to
Export