27th Congress of International Council of the Aeronautical Sciences, 19 - 24 September 2010, Nice, France
Paper ICAS 2010-3.9.3

THE UNSTEADY PRESSURE SIGNATURE OF TRANSONIC SHOCK WAVE/BOUNDARY LAYER INTERACTION

M. Bernardini, S. Pirozzoli, F. Grasso*
Univ. of Rome "La Sapienza", Italy; *Saint-Cyr-l’Ecole 78210, France

Keywords: transonic flows, shock/boundary layer interaction, pressure fluctuations, direct numerical simulation

A transonic shock/turbulent boundary layer interaction is analysed by DNS. The flow field shows strong intermittency associated with unsteady shedding of vortical structures, and universality of the pressure spectra, upon suitable scaling. A predictive model will be presented, capable to predict pressure spectra from global boundary layer properties.

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