Abstract
Passive methods of controlling shock/boundary-layer interactions (SBLIs) consist of a porous surface covering a cavity or a plenum located in the region of the SBLI. The present study focuses on the flowfield downstream of a Mach 1.42 SBLI controlled with various passive devices such as a conventional porous plate, a microporous plate, streamwise slots, a conventional mesoflap array, and a hybrid flap array. Qualitative analysis of the flowfield for the various control devices investigated was achieved with spark shadowgraph visualizations and surface oil-flow visualizations. Quantitative analysis was accomplished by measuring surface static pressure distributions and boundary layer velocity profiles. The flowfields downstream of the slot-controlled and hybrid flap array-controlled SBLIs were found to be highly three-dimensional, whereas the flowfields were predominantly two-dimensional for the remainder of the control devices. It was found that only the conventional mesoflap array had an improved total pressure recovery compared to the baseline solid wall.
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