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Transition mechanism in a shock wave boundary layer interaction

Moussa Diop
Aix Marseille Univ CNRS, IUSTI 13453 Marseille cedex 13, France

Sebastien Piponniau
Institut PPRIME, UPR 3346 CEAT, 43, rue de l'aerodrome 86000 Poitiers, France; Aix Marseille Univ CNRS, IUSTI 13453 Marseille cedex 13, France

Pierre Dupont
IUSTI Aix-Marseille University, UMR CNRS 7343 13453 Marseille Cedex 13, France

Sinopsis

The spatial development of a transitional Oblique Shock Wave Interaction at Mach 1.68 is documented thanks to high resolution Laser Doppler Anemometer (LDA) and Hot Wire Anemometer (HWA) measurements. The amplifications of the velocity fluctuations along the transitional separated shear layer is found to follow an exponential growing. The time properties of these unsteadiness are characterized with external hot wire measurements.