TURBOMACHINE AIRFOIL HAVING IMPINGEMENT COOLING PASSAGES

An airfoil (56, 106) includes a leading edge (112), a trailing edge (114), a base (108), and a tip (110). The airfoil (56, 106) further includes a pressure side wall (116) and a suction side wall (118) that extend between the leading edge (112), the trailing edge (114), the base (108), and the tip (110). The airfoil (56, 106) further includes a plurality of passages (122) that are defined within the airfoil (56, 106) and that each extend from an inlet (124) at one of the base (108) or the tip (110). Each passage (122) of the plurality of passages (122) is defined at least partially by a primary impingement wall (138) and a solid side wall (140). The primary impingement wall (138) is spaced apart from one of the pressure side wall (116) or the suction side wall (118) such that a primary impingement gap (142) is defined therebetween. The primary impingement wall (138) defines a plurality of impingement apertures (146) that direct air in discrete jets across the primary impingement gap (142) to impinge upon an interior surface of the airfoil (56, 106).