An investigation of passive control methods for shock-induced separation at hypersonic speedsThe effectiveness of several passive control techniques on shock-induced boundary-layer separation at hypersonic speed was investigated. Two approaches for alleviating the turbulent separation losses were examined: porous surface mass transfer and surface grooving. A total of four perforated surfaces with varying porosities were evaluated, and three groove orientations with respect to the freestream direction were studied. A comparison of the results from passive control techniques with those from an 'uncontrolled' shock impingement showed that the porous surface with the greatest porosity provided the greatest reduction in the pressure rise across the oblique shock wave. The grooved surface tested were found to be not effective; each of the grooved configurations examined increased the peak pressure value.
Document ID
19920062972
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Rallo, R. (NASA Langley Research Center Hampton, VA, United States)
Walsh, M. (NASA Langley Research Center Hampton, VA, United States)
Van Leer, Bram (Michigan, University Ann Arbor, United States)