Characteristics of multiple shock wave/turbulent boundary-layer interactions in rectangular ducts

摘要: Multiple shock wave/turbulent boundary-layer interactions in a rectangular duct have been investigated using wall pressure measurements, surface oil flow visualization, spark schlieren photography, and laser Doppler velocimetry. Two undisturbed incoming Mach numbers were considered, 2.45 1.6. At the structure was neutrally stable pattern of oblique shocks followed by repeated normal with level confinement having only small effect interaction. A large, three-dimensional separation region observed. 1.6 consisted bifurcated weaker, unbifurcated shocks. The boundary layer under incipiently separated. In contrast to case, lower number interaction much steadier length scaling directly confinement.