Correlation of separation shock motion with pressure fluctuations inthe incoming boundary layer

Abstract

Fluctuating wall pressures have been measured simultaneously in the incoming undisturbed turbulent boundary layer and under the unsteady separation shock in a Mach 5 compression ramp interaction. Conditional sampling algorithms, a variable-window ensemble averaging technique, and the variable interval time averaging technique have been used to investigate the possibility of a correlation between pressure fluctuations in the incoming flow and the separation shock wave motion.