MENUAcoustics of under-expanded Mach 1.5 impinging jet with a lift-plate. Density gradient contours (color) superimposed over gray-scale dilatation contours, showing turbulent structures, shock-cells in the jet plume and resulting acoustic waves.
FieldView animation courtesy of Prof. Datta V. Gaitonde, Mech. & Aerosp. Eng., The Ohio State University.