Surface sensors of thermal anemometer used to analyze PIV data

A new technique has been proposed and implemented that allows for time-frequency analysis of data obtained using the PIV method, taking into account the readings of the surface sensor of a hot-wire anemometer. The technique is based on calculating the correlation coefficients between the data obtained by the PIV method and the data from the hot-wire anemometer sensor, which were previously filtered in a given frequency range. Using this approach makes it possible to obtain data on the unsteady characteristics of flows throughout the entire measurement range in the frequency range, the boundaries of which extend beyond the boundaries of the frequency range of the PIV method. Using the proposed method, a study of non-stationary processes in the region of interaction of a shock wave with a boundary layer at the Mach number $\mathrm{M} = 1.43$ was carried out.