Airfoil including a tip shape for reducing noise and method for making the airfoil

摘要

An airfoil, a fan assembly and an unducted contra-rotating fan engine include fabricating at least one airfoil 72 including a suction 83 and a pressure 81 side coupled together at a leading 84 and a trailing 86 edge and extending therebetween. The airfoil includes a plurality of chord sections having a chord length 94. The airfoil including a tip profile 100 defining a reducing slope extending from the leading edge at the tip portion 88 along at least a portion of the chord length. The tip profile is configured to reduce the high unsteady pressure near the tip portion of the airfoil.