An experimental study of the impinging shock boundary layer interaction was carried out at Mach number of 5.88, stagnation enthalpy of 1.26 MJ/kg and Reynolds number based on plate length of 0.769 million. The influence of the leading edge bluntness on the interaction was studied. It was found that the separation length had a maximum value for the sharp leading edge, while it had nearly constant value for the 2 and 4 mm blunt leading edge. The reattachment pressure also followed the same trend, suggesting the weakening of the impinging shock caused by the bluntness. Numerical simulations did not predict the separation lengths accurately. However, it was able to predict the trend qualitatively.
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