Mechanics of Sound Generation in Flows

Tuesday, 28th August.- General Lecture: Why do the acoustics and the dynamics of a hypothetical mean flow bear on the issue of sound generation by turbulence?.- Sound radiation from a simulated jet flow.- Low frequency sound radiation due to the interaction of unsteady flows with a jet pipe.- Sound sinks in flows, a real possibility?.- Radiation properties of a turbulent jet excited by a sinusoidal acoustic disturbance.- The effects of upstream tones on the large scale instability waves and noise of jets.- Shear layer instability noise produced by various jet nozzle configurations.- On the radiation of sound by the instability waves of a compressible axisymmetric jet.- Sound generation by flow-acoustic coupling.- Near-wake structure and unsteady pressures at trailing edges of airfoils.- Investigation of trailing-edge noise.- Wednesday, 29th August.- General Lecture: Modelling low Mach number noise.- A study of production and stimulated emission of sound by vortex flows.- Aerodynamic sound generation by unsteady subsonic flows around rigid bodies.- Acoustic radiation from bodies in unsteady flows.- Influence of closely located solid surfaces on the sound spectra radiated by gas j ets.- Sound generation by head-on collision of two vortex rings.- Thursday, 30th August.- General Lecture: How powerful are the experimental techniques of sound source location in aero-acoustics; what prospects are there for an improvement?.- An evaluation of the Lighthill analogy for jet mixing noise generation: using LV turbulence, source location and spectral noise data.- Theory of cross-spectral densities of jet noise.- Some analytical considerations in jet noise prediction.- Theoretical and experimental study of wavelike disturbances in round free jet with emphasis being placed on orderly structures.- On the role of vortex pairing in jet noise generation.- Triple correlation of the pressure in subsonic circular jets and nonlinear interaction of instability waves.- On the role of surface