| 摘要 |
The disclosure relates to a first stage vane arrangement having an array of first stage vanes (10), and an array of frame segments (12) for axially receiving aft ends of a combustor transition pieces (24). The first stage vanes (10) comprise extended vanes (40), each extended vane (40) comprising a leading section (41), a trailing edge (42), and an airfoil (44) extending between an outer platform (13) and an inner platform (14), The frame segments (12) comprising an I-beam with an upper horizontal element (20), a lower horizontal element (21), and a vertical web (22), the vertical web (22) having a downstream face (27), facing towards a first stage of a turbine when installed in a gas turbine (9), wherein the downstream face (27) of the vertical web (22) of at least one of the frame segments (12) is overlapping when viewed in axial direction, at least partially, the leading section (41) of at least one of the extended vanes (40). The disclosure also relates to a method for cooling frame segments of the first vane arrangement of a gas turbine. |
