Aero- and Hydro-Acoustics [electronic resource] : IUTAM Symposium, Ecole Centrale de Lyon, 3–6 July, 1985 /

Session I — “Diffraction -- Diffraction and radiation -- Influence of airfoil mean loading on convected gust interaction noise -- Acoustic waves emitted by vortex-body interaction -- Non-steady flow over a trailing edge — An experimental study -- An experimental study of the influence of mean flow on acoustic dissipation by vorticity production at edges -- Session II — “Active Control” -- Active noise control -- The constraint of causality on an active control system -- Acoustic pressure and intensity distributions in finite length active noise control systems -- The active minimisation of harmonic enclosed sound fields -- Session III — “Source Mechanisms” -- Source identification techniques — A critical evaluation -- Sound generation in the ocean under a turbulent airflow -- Acoustic radiation fron vortex solitons -- Session IV — “Rotor Noise” -- Noise of high speed surfaces -- Comparison of two propeller source models for aircraft interior noise studies -- Modelling of trailing edge flow tones in elastic structures -- The Ffowcs Williams-Hawkings equation-fifteen years of research -- Session V — “Thermo Acoustics” -- Thermoacoustic sources -- Active control of the noise from a Rijke tube -- Coherence aspects of acoustic wave transmission through a medium with temperature fluctuations -- Session VI — “Computational Acoustics” -- Numerical methods in acoustics -- Computational aeroacoustics — Present status and future promise -- The wavenumber-frequency spectrum of the wall pressure field computed from a numerical solution of the Navier Stockes equation -- A mixed functional for the numerical resolution of fluid-structure interaction problems -- Rayonnement d’une plaque mince, homogène ou raidie, encastrée dans un plan parfaitement rigide -- Session VII — “Hydroacoustics” -- Topics in hydroacoustics -- Interaction hydroélastique entre une plaque et un écoulement -- The acoustics of disturbed steady motions -- Temporal variability in shallow water acoustic transmission and its correlation with the environment -- Underwater sound generation by waterhammer -- Session VIII — “Hydroacoustics (C’ nd)”: -- Finite amplitude sound beams resulting from nonlinear vibration of a circular membrane undergoing axisymmetric resonant excitation -- Theoretical prediction for the reduction of flow-induced noise on a plane surface -- The vibration of a periodically ring-stiffened, fluid-loaded cylinder -- Surface inpedance loading of panels -- Session IX — “Flow Noise” -- Excitation of instability waves -- On noise generated by turbulence in a pipe downstream of a discontinuous area enlargement -- Acoustoelasticity of a panel backed by a rectangular cavity -- Near field pressure fluctuations of a circular jet -- Experimental investigation of near and far acoustic field of a small turbojet -- Session X — “Aeroacoustics” -- Wind tunnel investigation of aeolian tones from rough surface cylinders -- Characterising pressure fluctuations on the wall of a circular cylinder perpendicular to a flow -- Flow effects on measurement of the modal decomposition of acoustic field in a hard wall cylindrical duct -- The effects of density on subsonic jet noise -- Session XI — “Acoustics Of Unstable Flows” -- Acoustics of unstable flows -- Hydrodynamic instabilities and surface waves in a flow over an impedance wall -- Wake-induced shear layer excitation in a basic annular jet -- Transient vortex modelling of flow induced acoustic resonances near cavities or obstructions in ducts -- Etude du couplage acoustique-instabilités aérodynamiques sur une maquette de statoréacteur -- Session XII — “Flow-Acoustic Interaction” -- On the influence of opening geometry on noise from air jets -- Response of a flat plate turbulent boundary layer to intense sound waves moving in the upstream direction -- An experiment on sound turbulence interaction by impulsive sound tube -- Disturbance induced by a boundary layer on sound sources location — Application to the case of a vehicle.

Bibliographic Details

Main Authors:	Comte-Bellot, Geneviève. editor., Williams, John E. Ffowcs. editor., SpringerLink (Online service)
Format:	Texto biblioteca
Language:	eng
Published:	Berlin, Heidelberg : Springer Berlin Heidelberg : Imprint: Springer, 1986
Subjects:	Physics., Mechanics., Engineering., Automotive engineering., Engineering geology., Engineering, Foundations., Hydraulics., Engineering, general., Geoengineering, Foundations, Hydraulics., Automotive Engineering.,
Online Access:	http://dx.doi.org/10.1007/978-3-642-82758-7
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