Large-scale unsteadiness in a compression ramp flow confined by sidewalls

Abstract

The complexity of a shock-wave/turbulent boundary layer interaction (SWTBLI) in the presence of sidewalls is investigated both qualitatively and quantitively in this work. Additional spanwise no-slip conditions led to the occurrence of secondary flows, which were not observed in the quasi-two-dimensional cases. Statistical analysis revealed asymmetric back-and-forth motion of the interaction across the midspan, possibly caused by the variation in the instantaneous size of the sidewall separated zones. Coupling between corner and centerline interactions was also observed as a result of higher confinement ratio.