Abstract
An experimental research program providing new knowledge of the fluctuating thermal loads in swept shock wave/turbulent boundary-layer interactions is described. An equilibrium turbulent boundary-layer on a flat plate is subjected to an impingement by the swept planar shock waves generated by a sharp fin. Two different fin angles at a freestream mach number of 4.0 produce relatively strong interactions. For each different interaction case the fluctuations of surface temperature in the interactions are obtained by miniature thin-film-resistance sensors connected to an anemometer. The distributions of properties of the surface temperature fluctuation, such as their rms levels and power spectra are obtained for each interaction. From the present measurement, the fluctuations of thermal loads near the reattachment of the separated flow under the λ-shock structure contains considerable high-frequency components, which is contrary to the previously observed unsteady phenomena of surface pressure in the same types of interactions.
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