![]() The hypothesis is seen to hold except in cases with slow- rate kinematics which evince significant trailing-edge separation (which refers here to separation leading to reversed flow on the aft portion of the upper surface), thereby establishing the envelope of validity. ![]() This hypothesis is tested and validated against a large set of data from CFD and experimental studies of flows with LEV formation. The LESP hypothesis is presented, which states that LEV formation in unsteady flows for specified airfoil shape and Reynolds number occurs at a critical constant value of LESP, regardless of motion kinematics. ![]() Abstract : A leading-edge suction parameter (LESP) that is derived from potential flow theory as a measure of suction at the airfoil leading edge is used to study initiation of leading- edge vortex (LEV) formation in this article. ![]()
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