The present study is aimed to analyse the effect of passive vortex generators in a transonic interaction between a shock-wave and a turbulent boundary layer in a channel flow at Mach number M = 1.45. Control of the boundary layer detachment downstream of the shock is obtained thanks to momentum transfer given by passive control devices, mechanical vortex generators (VG), located upstream of the shock and distributed in the spanwise direction. The channel’s lower wall is equipped with a contour profile - a bump - allowing flow separation. Two-component PIV velocity measurements are performed using the iterative gradient-based cross-correlation algorithm FOLKI-SPIV developed at ONERA. The evolution of the bulk flow and of the separated bubble due to the shock-wave boundary layer interaction is accurately quantified. Changes in the turbulent behaviour are also analysed thanks to the fluctuating fields. Comparisons with the already known flow without control give an appraisal of the effectiveness of such devices.