TURBINE AIRFOIL WITH LOCAL WALL THICKNESS CONTROL

摘要

A turbine airfoil for a gas turbine engine includes: an outer peripheral wall having an external surface (58), the outer peripheral wall enclosing an interior space and including a concave pressure sidewall (50) and a convex suction sidewall (52) joined together at a leading edge (54) and at a trailing edge (56); wherein the outer peripheral wall has a varying wall thickness which incorporates a locally-thickened wall portion (Z1, Z2, Z3); and a film cooling hole (74) having a shaped diffuser exit passing through the outer peripheral wall within the locally-thickened wall portion (Z1, Z2, Z3).