COOLABLE OUTER AIR SEAL ASSEMBLY FOR A GAS TURBINE ENGINE

摘要

A coolable outer air seal assembly (38) for a gas turbine engine (12) is disclosed. Various construction details are developed which provide an outer air seal assembly (38) comprised of a plurality of seal segments (46) including bumpers (62) adapted to maintain adequate cooling fluid flow through the clearance gap between adjacent seal segments (46). In one particular embodiment, each seal segment (46) includes a mating surface (64) having a plurality of bumpers (62) disposed adjacent to cooling fluid channel (58) outlets (72) and an axially extending ridge (88) disposed along the radially outer edge of the mating surface (64). The bumpers (62) extend circumferentially a distance Hb to maintain a minimum opening Gmin between adjacent seal segments (46) and extend a radial distance Wb to restrict fluid from flowing axially through the clearance gap. The ridge (88) extends radially outward to define in part a seal edge for engaging a feather seal (98).