Cast features for a turbine engine airfoil

摘要

An airfoil for a turbine engine (10) includes a structure (43) having a cooling passage (44, 45) that has a generally radially extending cooling passageway (48; 148) arranged interiorly relative to an exterior surface (47) of the structure (43). The cooling passageway (48; 148) includes multiple cooling slots (58; 158) extending there from toward the exterior surface (47) and interconnected by a radially extending trench (60; 160). The trench (60; 160) breaks the exterior surface (47), and the exterior surface (47) provides the lateral walls (64, 66; 164, 166) of the trench (60; 160). The airfoil is manufactured by providing a core (68; 168) having multiple generally axially extending tabs (70; 170) and a generally radially extending ligament (72; 172) interconnecting the tabs (70; 170). The structure (43) is formed about the core (68; 168) to provide the airfoil with its exterior surface (47). The ligament (72; 172) breaks the exterior surface (47) to form the radially extending trench (60; 160) in the exterior surface (47) of the structure (43).