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Supersonic Airfoils
An airfoil is a device that uses air flowing over its surface to generate lift. Airplane wings, propellers, tail surfaces are all examples of airfoils. Airfoils designed for subsonic speed flights are characterized by having rounded leading edges to flow separation.[1]. If an airfoil of such characteristics was used under supersonic speeds a detached shock would from in front of the leading edge, as a consequence an increase in wave drag will create a significant impact on the aerodynamics of a supersonic flight. This is why most supersonic airfoils consist of two arcs forming a relatively thin section with sharp leading and trailing edges without fear that the flow will be detached at the leading edge.
Notes
- ^ ""Fundamentals of Gas Dynamics"", " Robert D Zucker & Oscar Biblarz"