WALL-PRESSURE FLUCTUATIONS BENEATH TURBULENT BOUNDARY LAYERS: SOME REFLECTIONS ON FORTY YEARS OF RESEARCH

Research initiatives of E. J. Richards the University of Southampton on wall-pressure fluctuations beneath a turbulent boundary layer, some forty years ago, are reviewed. This work became part of a worldwide research effort in a field which has since burgeoned into one of extraordinary breadth. One fundamentally important aspect of the research—the establishment of the basic statistical correlation and spectral properties of the wall-pressure field—is selected for examination of the progress which has been made.