Importance

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Abstract

An internal cooling system (10) for an airfoil (12) in a turbine engine (14) whereby the cooling system (10) includes a chordwise extending tip cooling channel (16) radially inward of a squealer tip (18) and formed at least in part by an inner wall (20) with a nonlinear outer surface (22) is disclosed. The nonlinear outer surface (22) of the inner wall (20) of the chordwise extending tip cooling channel (16) may be formed from pressure and suction side sections (24, 26) that intersect at a point (74) that is closer to the inner surface (30) of an outer wall (32) forming at least a portion of the squealer tip (18) than other aspects of the pressure side section (24) and the suction side section (26). The configurations of the pressure and suction side sections (24, 26) reduces the flow cross-sectional area, which accelerates the cooling fluid flow in a chordwise direction within the chordwise extending tip cooling channel (16) and directs cooling fluid toward the pressure and suction side outer walls (34, 36) for improved cooling efficiency.

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First Claim