Aero- and Hydro-Acoustics: IUTAM Symposium, Ecole Centrale de Lyon, 3–6 July, 1985

Front Matter....Pages I-XX
Front Matter....Pages 1-1
Diffraction and Radiation....Pages 3-11
Influence of Airfoil Mean Loading on Convected Gust Interaction Noise....Pages 13-20
Acoustic Waves Emitted by Vortex-Body Interaction....Pages 21-28
Non-Steady Flow Over a Trailing Edge — An Experimental Study....Pages 29-36
An Experimental Study of the Influence of Mean Flow on Acoustic Dissipation by Vorticity Production at Edges....Pages 37-45
Front Matter....Pages 47-47
Active Noise Control....Pages 49-62
The Constraint of Causality on an Active Control System....Pages 63-74
Acoustic Pressure and Intensity Distributions in Finite Length Active Noise Control Systems....Pages 75-85
The Active Minimization of Harmonic Enclosed Sound Fields....Pages 87-92
Front Matter....Pages 93-93
Source Identification Techniques — A Critical Evaluation....Pages 95-102
Sound Generation in the Ocean Under a Turbulent Airflow....Pages 103-111
Acoustic Radiation from Vortex Solitons....Pages 113-116
Front Matter....Pages 117-117
Noise of High Speed Surfaces....Pages 119-133
Comparison of Two Propeller Source Models for Aircraft Interior Noise Studies....Pages 135-143
Modelling of Trailing Edge Flow Tones in Elastic Structures....Pages 145-173
The Ffowcs Williams-Hawkings Equation — Fifteen Years of Research....Pages 175-180
Front Matter....Pages 181-181
Thermoacoustic Sources....Pages 183-209
Active Control of the Noise from a Rijke Tube....Pages 211-216
Coherence Aspects of Acoustic Wave Transmission Through a Medium with Temperature Fluctuations....Pages 217-226
Front Matter....Pages 227-227
Numerical Methods in Acoustics....Pages 229-252
Front Matter....Pages 227-227
Computational Aeroacoustics — Present Status and Future Promise....Pages 253-259
The Wavenumber-Frequency Spectrum of the Wall Pressure Field Computed from a Numerical Solution of the Navier Stokes Equation....Pages 261-268
A Mixed Functional for the Numerical Resolution of Fluid-Structure Interaction Problems....Pages 269-276
Rayonnement d’une Plaque Mince, Homogène ou Raidie, Encastrée dans un Plan Parfaitement Rigide....Pages 277-281
Front Matter....Pages 283-283
Topics in Hydro-acoustics....Pages 285-308
Interaction Hydroelastique entre une Plaque et un Ecoulement....Pages 309-314
The Acoustics of Disturbed Steady Motions....Pages 315-321
Temporal Variability in Shallow Water Acoustic Transmission and its Correlation with the Environment....Pages 323-331
Underwater Sound Generation by Waterhammer....Pages 333-338
Front Matter....Pages 339-339
Finite Amplitude Sound Beams Resulting from Nonlinear Vibration of a Circular Membrane Undergoing Axisymmetric Resonant Excitation....Pages 341-347
Theoretical Prediction for the Reduction of Flow-Induced Noise on a Plane Surface....Pages 349-356
The Vibration of a Periodically Ring-Stiffened, Fluid-Loaded Cylinder....Pages 357-361
Surface Impedance Loading of Panels....Pages 363-370
Front Matter....Pages 371-371
Excitation of Instability Waves....Pages 373-384
On Noise Generated by Turbulence in a Pipe Downstream of a Discontinuous Area Enlargement....Pages 385-392
Acousto-elasticity of a Panel Backed by a Rectangular Cavity....Pages 393-402
Near Field Pressure Fluctuations of a Circular Jet....Pages 403-409
Experimental Investigation of Near and Far Acoustic Field of a Small Turbojet....Pages 411-417
Front Matter....Pages 419-419
Wind Tunnel Investigation of Aeolian Tones from Rough Surface Cylinders....Pages 421-428
Characterizing Pressure Fluctuations on the Wall of a Circular Cylinder Perpendicular to a Flow....Pages 429-435
Front Matter....Pages 419-419
Flow Effects on Measurement of the Modal Decomposition of Acoustic Field in a Hard Wall Cylindrical Duct....Pages 437-443
The Effects of Density on Subsonic Jet Noise....Pages 445-452
Front Matter....Pages 453-453
Acoustics of Unstable Flows....Pages 455-481
Hydrodynamic Instabilities and Surface Waves in a Flow over an Impedance Wall....Pages 483-490
Wake-Induced Shear Layer Excitation in a Basic Annular Jet....Pages 491-498
Transient Vortex Modelling of Flow Induced Acoustic Resonances Near Cavities or Obstructions in Ducts....Pages 499-505
Etude du Couplage Acoustique-Instabilités Aérodynamiques sur une Maquette de Statoréacteur....Pages 507-513
Front Matter....Pages 515-515
On the Influence of Opening Geometry on Noise from Air Jets....Pages 517-524
Response of a Flat Plate Turbulent Boundary Layer to Intense Sound Waves Moving in the Upstream Direction....Pages 525-531
An Experiment on Sound Turbulence Interaction by ‘Impulsive Sound Tube’....Pages 533-540
Disturbance Induced by a Boundary Layer on Sound Sources Location. Application to the Case of a Vehicle....Pages 541-549