Abstract
A cooling film (Mach 2.3) is injected into a supersonic wind tunnel's (Mach 3.8) flow field. As the curvature radius decreases, mixing layer destabilization is delayed on the CV (convex wall) and advanced on the CC (concave wall). When x = 20–60 mm, wall pressure is influenced by the cooling film, and when x = 100–220 mm, curvature dominates. As the curvature radius decreases, pressure on the concave wall increases more rapidly, while that on the convex wall decreases more swiftly. IP (impulse for bulk dilation) values on the CC-1500 and CV-1500 walls are approximately twice those on the CC-3000 and CV-3000 walls, respectively.
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