View Video Presentation: https://doi.org/10.2514/6.2022-0700.vid

The unsteady features of a 24 deg compression-ramp interaction controlled with air-jet vortex generators (AJVGs) were assessed and compared to that of a baseline configuration at Mach 2.52 and a momentum-thickness based Reynolds number of 8225. 2C-PIV was performed at the model centreline to characterise the instantaneous features of the incoming boundary-layer and the fully-separated shock-wave/ boundary-layer interaction. The probability density functions of the incoming boundary-layer, the separation-shock, and the separation-bubble area show that they are unsteady in time for both the uncontrolled and the AJVG-controlled interactions. Injection of the jets introduce additional structures into the incoming boundary-layer and result in the reduction of mean-separation area. However, analysis based on correlation coefficients and conditional statistics revealed only a weak influence of the incoming boundary-layer structures and a higher dominance of the separation-bubble and the separated shear layer on the shock wave oscillations, for both the uncontrolled and the AJVG-controlled SWBLIs.