Compressible turbulent boundary-layer characteristics on a roughened surface were studied in the presence of a wedge-induced adverse pressure gradient. All tests were conducted at nominal Mach and unit Reynolds numbers of 33 x 10 6 , 66 X 10 6 , and 98 X 10 6 /m. Documentation of the surface pressure distribution confirmed the two dimensionality of the boundary-level flow throughout the interaction region. A 10% change in the upstream extent of the separation point was observed when the Reynolds number was increased from 33 X 10 6 to 66 X 10 6 /m. Pitot pressure and total temperature profiles in the boundary layer upstream and downstream of the interaction region were also acquired. Pitot pressure profiles on the ramp were found to reach a maximum 3.5 times that of the local boundary-layer edge pitot pressure. Similarly, total temperature profiles were found to overshoot the stagnation temperature. Furthermore, the bimodal character of these temperature profiles was observed on the ramp with peak values 5-30% larger than the freestream total temperature. Nomenclature c = local speed of sound, m/s M = Mach number PI = surface pressure at a given xy location, mm Hg P ref = undisturbed reference surface pressure acquired at x = -16.469 cm, mm Hg P s = static pressure, mm Hg P t = local pitot pressure, MPa P Q -stagnation/reservoir pressure, MPa Re -unit Reynolds number/m T s = static temperature, K T t -local total temperature, K T 0 = stagnation/reservoir temperature U = local mean velocity, m/s C/ inf = freestream velocity, m/s x = stream wise distance, cm x s = separation distance measured from flat plate/wedge intersection point, cm y = lateral distance along the width of the plate, cm z = distance taken perpendicular (transverse) to the plate, mm d = boundary-layer thickness location where velocity is 99% of freestream, mm
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