LII. Experiments on two-dimensional supersonic flow in corners and over concave surfaces

Summary Two simple cases of two-dimensional supersonic flow were investigated by schlieren photography, viz. the flow in two consecutive corners and the flow over a circular-arc profile concave to the stream. The flows were photographed for smooth and rough surfaces of the models, i.e. with laminar and turbulent boundary layers, and the observed flow-patterns are compared with those predicted by inviscid theory. The flow with a turbulent boundary layer was in good agreement with inviscid theory outside the boundary layer, whereas the laminar boundary layer separated and a shock wave originated at the point of separation, in both cases the agreement was good at points far from the surface.