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Aeroacoustics of Low Mach Number Flows,

Edition 2 Fundamentals, Analysis and Measurement

Editors: By Stewart Glegg and William Devenport

Publication Date: 27 Sep 2023

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Aeroacoustics of Low Mach Number Flows: Fundamentals, Analysis and Measurement, Second Edition provides a detailed introduction to sound radiation from subsonic flow over moving surfaces. This phenomenon is the most widespread cause of flow noise in engineering systems, including fan noise, rotor noise, wind turbine noise, boundary layer noise, airframe noise and aircraft noise. This fully updated new edition includes additional problems, illustrations and summary materials to support readers. New content covers Rapid Distortion theory (RDT), boundary layer wall pressure fluctuations, and flow induced sound at surfaces. Themes addressing non-compressible flows have also been added, offering coverage of hydroacoustic as well as aeroacoustic applications.

New support materials for this edition include course outlines, problem sets, sample MATLAB codes and experimental data to be found at www.aeroacoustics.net.

Key Features

Addresses, in detail, sound from rotating blades, ducted fans, airframes, boundary layers, and more
Presents theory in such a way that it can be used in computational methods and calculating sound levels
Includes coverage of different experimental approaches to this subject

About the author

By Stewart Glegg, Affiliate faculty member of CREATe at Virginia Tech, Blacksburg, VA and William Devenport, Crofton Professor of Engineering, CREATe, Kevin T. Crofton Department of Aerospace and Ocean Engineering, Virginia Tech, Blacksburg, VA

Part 1: Fundamentals
1. Introduction
Stewart Glegg and William Devenport
2. The equations of fluid motion
Stewart Glegg and William Devenport
3. Linear acoustics
Stewart Glegg and William Devenport

Part 2: Fundamentals of Aeroacoustics
4. Lighthill's acoustic analogy
Stewart Glegg and William Devenport
5. The Ffowcs Williams and Hawkings Equation
Stewart Glegg and William Devenport
6. Propeller and Open Rotor Noise
Stewart Glegg and William Devenport

Part 3: Unsteady Blade Loading
7. Amiet’s approach – the Surface Source for Thin Airfoils
Stewart Glegg and William Devenport
8. Goldstein’s approach – flows with distortion
Stewart Glegg and William Devenport
9. Howe’s and Powell’s approach - vortex sound
Stewart Glegg and William Devenport

Part 4: Turbulent Flows
10. Stochastic processes
Stewart Glegg and William Devenport
11. Turbulence and Turbulent Flows
Stewart Glegg and William Devenport
12. Wall Pressure Fluctuations in Turbulent Boundary Layers
Stewart Glegg and William Devenport

Part 5: Broadband Flow Noise from Surface Interactions and Fans
13. Broadband Noise from Open Rotors and Leading-edge Noise
Stewart Glegg and William Devenport
14. Trailing Edge and Roughness Noise
Stewart Glegg and William Devenport
15. Duct Acoustics
Stewart Glegg and William Devenport
16. Fan Noise
Stewart Glegg and William Devenport

Part 6: Experimental Methods
17. Aeroacoustic Testing and Instrumentation
Stewart Glegg and William Devenport
18. Measurement, Signal Processing and Uncertainty
Stewart Glegg and William Devenport
19. Phased Arrays
Stewart Glegg and William Devenport

Part 7 Advanced Mathematical Methods
20. The Theory of Edge Scattering
Stewart Glegg and William Devenport

Appendix A:Nomenclature
Stewart Glegg and William Devenport
Appendix B: Branch Cuts
Stewart Glegg and William Devenport
Appendix C: The Cascade Blade Response Function
Stewart Glegg and William Devenport
Appendix D: RDT and the Distortion Tensor
Stewart Glegg and William Devenport

ISBN: 9780443191121

Page Count: 722

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Graduate students and researchers with an interest in hydroacoustics or aeroacoustics