Planar laser-induced fluorescence (PLIF) measurements are performed in a hypersonic boundary layer flow over a flat plate at zero incidence. The boundary layer thickness is approximately 1 mm at a distance of 75 mm from the leading edge for this Mach 7.5 nitrogen flow. The temperature variations within the boundary layer are satisfactorily resolved using PLIF. Reduction of the experimental data to produce a temperature profile across the boundary layer shows good agreement with predictions from a high-resolution Navier-Stokes solver.
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