Patent ID: 9228442
Filing Date: 2016-01-05
CPC Classification: F01D,Y02T

Claim Text:
1. An airfoil comprising: a leading edge, a trailing edge and pressure and suction surfaces defining a chord length therebetween, the pressure and suction surfaces extending from a root section of the airfoil to a tip section of the airfoil; a tip shelf formed along the tip section of the airfoil between the pressure surface and a tip shelf wall spaced between the pressure surface and the suction surface, wherein the tip shelf extends from the leading edge to an intersection of the pressure surface and the suction surface at the trailing edge such that the tip shelf communicates with both the pressure surface and the suction surface proximate to the trailing edge, wherein the tip shelf extends around the leading edge and onto the suction surface to terminate on the suction surface between the leading edge and the trailing edge of the airfoil; and a squealer pocket formed along the tip section of the airfoil between the tip shelf wall and a squealer tip wall extending from the suction surface, wherein the squealer pocket extends from within 10% of the chord length measured from the leading edge to terminate within 10% and 25% of the chord length measured from the trailing edge.