EXPERIMENTAL INVESTIGATION OF THE REFLECTION OF A SHOCK-WAVE ON A HEATED WALL IN PRESENCE OF A TURBULENT BOUNDARY-LAYER

The aim of the present study was to investigate the properties of the interaction between a plane oblique shock wave and a turbulent boundary layer developing on a strongly heated wall. The experiments were carried out on a planar two-dimensional test arrangement for an upstream Mach number equal to 2.4. Two intensities of the incident shock wave were considered, the first corresponding to incipient separation conditions and the second to the formation of an extended separated region. Each interaction was investigated for the adiabatic case and for a wall raised to a temperature which was twice the recovery temperature. Measurements include a large number of surveys using static pressure and stagnation temperature probes, as well as two-component Laser Doppler Velocimetry. The results obtained have shown that wall heating strongly influences the interaction by causing a marked dilatation of the interaction domain. The observed tendencies are in agreement with the well known influence of wall cooling where - the contrary occurs - the interaction region shrinks down.