Film cooling method and method of manufacturing a hole in gas turbine engine part

摘要

A cooled cast part (22) has an exterior surface. A cooling passageway system extends from at least one inlet port to a plurality of outlet ports (40, 42). The passageway system includes a first passageway (55) to at least a first (42) of the outlets and surrounding at least one post (66). The system includes a second passageway (62) to at least a second (40) of the outlets passing through the at least one post (66).