The Design of a Two-Dimensional,High-Endurance Airfoil with a Given Thickness Distribution and Reynolds Number.

摘要

A design procedure has been developed for determining the shape of a high-endurance airfoil for a given initial thickness distribution and chord length Reynolds number. The Strand method,which is based on the Stratford theory of incipient separation and the optimization principle of the calculus of variations,was utilized to yield an optimized velocity distribution. A generalized parametric study of the upper surface velocity,lift,and drag characteristics for various flow conditions resulted in a series of preliminary design curves. A practical set of performance characteristics based on these parametric curves led to a reasonable airfoil shape.