| 摘要 |
An air seal (76) for a gas turbine engine platform (62) comprises a flow path platform, a seal retention ring (82), a finger seal (78). The seal retention ring (82) is situated radially adjacent the flow path platform (62). The finger seal (78) is retained by the seal retention ring (82) between the flow path platform (62) and the seal retention ring (82). The finger seal (78) comprises a first ply (96) with first keyhole slots (102), a second ply (98) with second keyhole slots (104) circumferentially offset relative to the first keyhole slots (102), and a foil layer (100). The foil layer (100) is disposed between the first and second plies (96, 98). The finger seal (78) has a series of cooling holes (94) in the outer circumferential segment (78B) to cool the outer diameter of the seal (76). In addition, leakage between the finger seal (78) and the flow path platform (62) cools the inner diameter of the seal (76). |
