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Acoustic Analysis and Design of Short Elliptical End-Chamber Mufflers: Applicati

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Last updated on May 19, 2024 06:11:13 EDTView all revisionsView all revisions

Item specifics

Condition
Brand New: A new, unread, unused book in perfect condition with no missing or damaged pages. See the ...
ISBN-13
9789811048272
Type
NA
Publication Name
NA
ISBN
9789811048272
Publication Year
2021
Format
Trade Paperback
Language
English
Book Title
Acoustic Analysis of Elliptical Cylindrical Mufflers : Application to Automotive Muffler Design
Author
Akhilesh Mimani, Manohar Lal Munjal
Item Length
9.3in
Publisher
Springer
Genre
Technology & Engineering, Science
Topic
Automotive, Acoustics & Sound
Item Width
6.1in
Item Weight
16 Oz
Number of Pages
Xiii, 153 Pages

About this product

Product Information

This monograph highlights a comprehensive account of the three-dimensional analysis and design of reactive (rigid-wall) elliptical cylindrical mufflers for automotive applications. 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 tabulation and analysis, for the first time, of the parametric zeros and the corresponding non-dimensional resonance frequencies of the transverse modes of a rigid-wall elliptical waveguide for a complete range of its aspect ratio. The modal shape patterns of the first few circumferential, radial and cross-modes are examined along with the significance of the associated pressure nodal lines in context with location of inlet/outlet ports. (Additionally, the Appendix tabulates the non-dimensional resonance frequencies of a clamped elliptical membrane for a complete range of aspect-ratio.) A theoretical formulation is then outlined for characterizing single-inlet and single-outlet (SISO) elliptical cylindrical chamber mufflers with arbitrary location of ports, either on the end face or side surface. The ensuing chapters are devoted towards analyzing the Transmission Loss (TL) performance of different configurations, namely, (a) the straight-flow or flow-reversal mufflers having inlet ports on the opposite or same end face, respectively, (b) mufflers having an end/side-inlet and side/end-outlet as well as (c) mufflers having a side-inlet and a side-outlet. The analytical framework explains how to exploit the principle of suppression or excitation of certain transverse (evanescent) modes by locating the ports on pressure nodes of these modes towards achieving a broadband TL performance. On this basis, design guidelines are then formulated in terms of optimal port locations for the aforementioned configurations, in particular, for short straight-flow/flow-reversal elliptical end-chambers that yield a broadband attenuation, a practically useful outcome for an automotive muffler designer. Furthermore, the validity of the one-dimensional transverse plane wave theory in the low-frequency range for short chambers is explained by observing the first few transverse mode shapes and through the three-dimensional Green's function's formulation. Some directions for future work are also indicated towards the end. In summary, this monograph is a one-stop solution for a practicing automotive engineer designing mufflers, applied mathematicians studying acoustic wave propagation in elliptical geometries, and also for students of engineering acoustics.

Product Identifiers

Publisher
Springer
ISBN-10
9811048274
ISBN-13
9789811048272
eBay Product ID (ePID)
240064895

Product Key Features

Book Title
Acoustic Analysis of Elliptical Cylindrical Mufflers : Application to Automotive Muffler Design
Author
Akhilesh Mimani, Manohar Lal Munjal
Format
Trade Paperback
Language
English
Topic
Automotive, Acoustics & Sound
Publication Year
2021
Genre
Technology & Engineering, Science
Number of Pages
Xiii, 153 Pages

Dimensions

Item Length
9.3in
Item Width
6.1in
Item Weight
16 Oz

Additional Product Features

Number of Volumes
1 Vol.
Lc Classification Number
Tl1-483
Table of Content
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.
Copyright Date
2021
Dewey Decimal
629.252
Series
Springerbriefs in Applied Sciences and Technology Ser.
Dewey Edition
23
Illustrated
Yes

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