Abstract: Experimental investigation of surface features in a swept shock turbulent boundary layer interaction induced by a sharp fin at angle of attack of 30 ° is performed using surface oil-dot visualization, liquid crystal surface thermography, surface heat transfer and pressure measurements. The nominal test condition is free stream Mach number of 7.8, unit Reynolds number of 3.5× 107/ m. The study shows that the surface flow is quasi-conical. There are both secondary separation and attachment in the strong interaction. The streak deflection, surface heat transfer and pressure distributions show distinct dip associated with secondary separation.

Key words: flow shock wave and boundary layer interaction, hypersonic flow, separated flow, visualization, liquid crystals, heat transfer measurements