Application of spectral approach to the analysis of laser visualization of the boundary layer on a flat plate

Data on the structure of flow seeding with particles in a supersonic wind tunnel with electric arc heating of the working fluid are reported. Velocity profiles near the plate surface have been obtained. The dependence of the spectral characteristics of heterogeneity of particle seeding in the boundary layer on the Reynolds number and flow regimes is shown. The possibility of isolating the anisotropic component of the heterogeneity field of particle distribution in the laminar boundary layer of the plate is presented.