Quasi-periodic Aerodynamic Heating in Blunt-fin Induced Shock Wave/Boundary Layer Interaction

Aerodynamic heating in the blunt-fin induced shock wave/boundary layer interaction is investigated by means of numerical simulations. The complex flow pattern on the flat plate is visualized by surface friction lines. The three-dimensional vortical structures and primary shock wave system in the interaction region are demonstrated. The calculated separation length upstream the fin and the heat flux distribution in the centreline are consistent with the experimental observations. The results exhibits quasi-periodic behavior of the interference flow. Both the time-averaged and instantaneous heat flux on the surface of the flat plate and fin are analyzed, respectively. Due to the shock wave and boundary layer interaction, some regions of extremely high peak heating on the flat plate are observed. The formation mechanism of the high peak heating is also discussed.