Characterization of a high Reynolds number turbulent boundary layer by means of PIV

To characterize the turbulent boundary layer evolution in the LMFL wind tunnel, two experiments of velocity measurement by PIV were carried out. A first campaign was done based on a high magnification 2C2D PIV in the near wall region in order to capture the near wall scales and the mean gradient. A second experiment of stereo PIV using two systems was carried out to measure the full boundary layer with a good spatial resolution. By merging these two experiments, a good characterization can be made at 3 stations along the wind tunnel and for three free-stream velocities.