Abstract
The influence of the flat-plate leading-edge shape on laminar–turbulent transition is investigated. Experiments were carried out at a Mach number of ; a unit Reynolds number from to ; and a Reynolds number , based on the leading-edge thickness , up to . Four leading-edge shapes were investigated: cylindrical, elliptical, flat face, and “smoothed” cylindrical. It has been shown that for , these shapes practically do not affect transition; whereas at large , the laminar run can be lengthened or shortened by the leading-edge shaping. The influence of bluntness thickness on the flow parameters at transition onset is analyzed by solving the Navier–Stokes and boundary-layer equations.
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