TOC - aeroacoustics of low mach number - Stewart Glegg, William Devenport

Table of Contents

Part 1: Fundamentals

1: Introduction

  • Abstract
  • 1.1 Aeroacoustics of low Mach number flows
  • 1.2 Sound waves and turbulence
  • 1.3 Quantifying sound levels and annoyance
  • 1.4 Symbol and analysis conventions used in this book

2: The equations of fluid motion

  • Abstract
  • 2.1 Tensor notation
  • 2.2 The equation of continuity
  • 2.3 The momentum equation
  • 2.4 Thermodynamic quantities
  • 2.5 The role of vorticity
  • 2.6 Energy and acoustic intensity
  • 2.7 Some relevant fluid dynamic concepts and methods

3: Linear acoustics

  • Abstract
  • 3.1 The acoustic wave equation
  • 3.2 Plane waves and spherical waves
  • 3.3 Harmonic time dependence
  • 3.4 Sound generation by a small sphere
  • 3.5 Sound scattering by a small sphere
  • 3.6 Superposition and far field approximations
  • 3.7 Monopole, dipole, and quadrupole sources
  • 3.8 Acoustic intensity and sound power output
  • 3.9 Solution to the wave equation using Green's functions
  • 3.10 Frequency domain solutions and Fourier transforms

4: Lighthill's acoustic analogy

  • Abstract
  • 4.1 Lighthill's analogy
  • 4.2 Limitations of the acoustic analogy
  • 4.3 Curle's theorem
  • 4.4 Monopole, dipole, and quadrupole sources
  • 4.5 Tailored Green's functions
  • 4.6 Integral formulas for tailored Green's functions
  • 4.7 Wavenumber and Fourier transforms

5: The Ffowcs Williams and Hawkings equation

  • Abstract
  • 5.1 Generalized derivatives
  • 5.2 The Ffowcs Williams and Hawkings equation
  • 5.3 Moving sources
  • 5.4 Sources in a free stream
  • 5.5 Ffowcs Williams and Hawkings surfaces
  • 5.6 Incompressible flow estimates of acoustic source terms

6: The linearized Euler equations

  • Abstract
  • 6.1 Goldstein's equation
  • 6.2 Drift coordinates
  • 6.3 Rapid distortion theory
  • 6.4 Acoustically compact thin airfoils and the Kutta condition
  • 6.5 The Prantl–Glauert transformation

7: Vortex sound

  • Abstract
  • 7.1 Theory of vortex sound
  • 7.2 Sound from two line vortices in free space
  • 7.3 Surface forces in incompressible flow
  • 7.4 Aeolian tones
  • 7.5 Blade vortex interactions in incompressible flow
  • 7.6 The effect of angle of attack and blade thickness on unsteady loads

8: Turbulence and stochastic processes

  • Abstract
  • 8.1 The nature of turbulence
  • 8.2 Averaging and the expected value
  • 8.3 Averaging of the governing equations and computational approaches
  • 8.4 Descriptions of turbulence for aeroacoustic analysis

9: Turbulent flows

  • Abstract
  • 9.1 Homogeneous isotropic turbulence
  • 9.2 Inhomogeneous turbulent flows

Part 2: Experimental approaches

10: Aeroacoustic testing and instrumentation

  • Abstract
  • 10.1 Aeroacoustic wind tunnels
  • 10.2 Wind tunnel acoustic corrections
  • 10.3 Sound measurement
  • 10.4 The measurement of turbulent pressure fluctuations
  • 10.5 Velocity measurement

11: Measurement, signal processing, and uncertainty

  • Abstract
  • 11.1 Limitations of measured data
  • 11.2 Uncertainty
  • 11.3 Averaging and convergence
  • 11.4 Numerically estimating fourier transforms
  • 11.5 Measurement as seen from the frequency domain
  • 11.6 Calculating time spectra and correlations
  • 11.7 Wavenumber spectra and spatial correlations

12: Phased arrays

  • Abstract
  • 12.1 Basic delay and sum processing
  • 12.2 General approach to array processing
  • 12.3 Deconvolution methods
  • 12.4 Correlated sources and directionality

Part 3: Edge and boundary layer noise

13: The theory of edge scattering

  • Abstract
  • 13.1 The importance of edge scattering
  • 13.2 The Schwartzschild problem and its solution based on the Weiner Hopf method
  • 13.3 The effect of uniform flow
  • 13.4 The leading edge scattering problem

14: Leading edge noise

  • Abstract
  • 14.1 The compressible flow blade response function
  • 14.2 The acoustic far field
  • 14.3 An airfoil in a turbulent stream
  • 14.4 Blade vortex interactions in compressible flow

15: Trailing edge and roughness noise

  • Abstract
  • 15.1 The origin and scaling of trailing edge noise
  • 15.2 Amiet's trailing edge noise theory
  • 15.3 The method of Brooks, Pope, and Marcolini [8]
  • 15.4 Roughness noise

Part 4: Rotating blades and duct acoustics

16: Open rotor noise

  • Abstract
  • 16.1 Tone and broadband noise
  • 16.2 Time domain prediction methods for tone noise
  • 16.3 Frequency domain prediction methods for tone noise
  • 16.4 Broadband noise from open rotors
  • 16.5 Haystacking of broadband noise
  • 16.6 Blade vortex interactions

17: Duct acoustics

  • Abstract
  • 17.1 Introduction
  • 17.2 The sound in a cylindrical duct
  • 17.3 Duct liners
  • 17.4 The Green's function for a source in a cylindrical duct
  • 17.5 Sound power in ducts
  • 17.6 Nonuniform mean flow
  • 17.7 The radiation from duct inlets and exits

18: Fan noise

  • Abstract
  • 18.1 Sources of sound in ducted fans
  • 18.2 Duct mode amplitudes
  • 18.3 The cascade blade response function
  • 18.4 The rectilinear model of a rotor or stator in a cylindrical duct
  • 18.5 Wake evolution in swirling flows
  • 18.6 Fan tone noise
  • 18.7 Broadband fan noise

Appendix A: Nomenclature

A.1 Symbol conventions, symbol modifiers, and Fourier transforms

A.2 Symbols used

Appendix B: Branch cuts

Appendix C: The cascade blade response function

Index

Aeroacoustics of Low Mach Number Flows - 1st Edition (elsevier.com)

posted @ 2021-06-29 15:05  kaiming_ai  阅读(90)  评论(0)  编辑  收藏  举报