Abstract
position and pressure level has been observed. This is certainly true for the flow type with leading-edge separation and agrees in general with results of Ref. 8. However, for the type of flow described as separation with shock, further considerations are worthwhile. The experiments seem to show that the separation bubble flattens for higher Reynolds numbers, moving closer to the upper surface until the flow near the leading edge is attached. Thus another type of flow, the well-known shock-induced separation, is established. According to the aN—MN diagram of Fig. 1 and the preceding conclusions, shock-induced separation is obtained at either higher Mach numbers or higher Reynolds numbers. The ctN —MN diagram is therefore strictly valid only for fixed Reynolds numbers, a fact which is also confirmed by results at hypersonic Mach numbers.
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