Acoustic Analysis And Design Of Short Elliptical Endchamber Mufflers Elliptical Mufflers Springerbriefs In Applied Sciences And Technology

Acoustic Analysis And Design Of Short Elliptical Endchamber Mufflers Elliptical Mufflers Springerbriefs In Applied Sciences And Technology
1     Introduction
1.1    Motivation and Historical Developments
1.2    Wave Propagation in Elliptical Domain: Occurrence of Mathieu functions
1.3    Necessary use of Elliptical Mufflers in Automotive Applications
1.4    Objectives (to present a coherent account on the different aspects of
analysis and design of elliptical chamber mufflers for automotive applications)
1.5    Organization of the Brief

2    General Solution of the Helmholtz equation in Elliptical Cylindrical Co-ordinates 
2.1   Computation of the Mathieu and the Modified Mathieu Functions
2.2   Resonance Frequencies of Hard-Wall Elliptical Cylindrical Waveguides
2.2.1 Numerical Computation of q-Parameters and the Corresponding Cut-on Frequencies
2.3   Tabulation of q-Parameters and the Non-Dimensional Resonance Frequency 2.4   First Few Hard-Wall Transverse Modes
2.4.1 Radial Modes 
2.4.2 Circumferential Modes
2.4.2.1 Even Modes
2.4.2.2 Odd Modes
2.4.3 Cross-modes
2.5 Polynomial Interpolation Expressions

3   Characterization of a Single-Inlet and Single-Outlet Elliptical Cylindrical Muffler
3.1 Derivation of the Green's Function
3.2 End-Inlet and End-outlet Elliptical Configuration
3.2.1 Straight-Flow Configuration
3.2.2 Flow-Reversal Configuration
3.3 End-Inlet and Side-Outlet Configuration
3.4 Side-Inlet and Side-Outlet Configuration
3.5 Evaluating the Impedance [Z] Matrix Parameters
3.6 Transmission Loss Performance in terms of Scattering [S] Matrix Parameters
4    Analysis and Design of Short End-Chamber Mufflers
4.1 Straight-flow and Flow-Reversal Configurations
4.1.1  Optimal Port Location for Broadband Attenuation Performance
4.1.1.1  Parametric Investigation of Variation in Aspect Ratio
4.2  End-inlet and Side-Outlet Configuration
4.3  Formulation of General Design Guidelines

5   Analysis and Design of Long Chamber Mufflers
5.1 End-Inlet and Side-Outlet Configuration
5.1.1 Optimal Port Location for Broadband Attenuation Performance
5.2 End-Inlet and Side-Outlet Configuration
5.2.1 Optimal Port Location for Broadband Attenuation Performance
5.3  Formulation of General Design Guidelines

6  Justification of the 1-D Transverse Plane Wave Theory for Short Chambers

7  Analysis of Semi-Elliptical/Semi-Circular Cylindrical Chambers
7.1 Solution of Wave Equation
7.1.1 Semi-Elliptical Geometry
7.1.2 Semi-Circular Geometry
7.2 Characterization of Mufflers with Different Inlet/Outlet Port Configurations
7.3 Optimal Port Location for Broadband Attenuation Performance
7.4 Formulation of General Design Guidelines

8   Concluding Remarks


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Encadernação: Capa Mole / Paperback
Tema: Automotive technology & trades