| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling system for cooling adjacent side edges of inside/outside platforms of nozzle segments arranged around an axis line of a turbine in an annular arrangement. SOLUTION: The cooling system for nozzle edges includes a chamber (46) containing a cooling medium. First and second elongated plenums (48, 70) are disposed along opposite side edges (42, 72) for each platform. Inlet passages (50, 74) communicate the cooling medium from the chamber (46) into inside of each of the plenums (48, 70). Outlet passages (52, 78) from each of the plenums (48, 70) terminate in outlet holes (54, 80) in the side edges of the platform to cool a gap between the nozzle segments adjacent to each other. Passages (56, 82) are communicated with each of the plenums (48, 70), and terminate in film cooling holes to film cool platform surfaces. Inside each of the plenums (48, 70), the inlet passages (50, 74) are not in a flow communication state in a direct line-of-sight direction with the outlet passages (52, 78) and the passages (56, 82). COPYRIGHT: (C)2005,JPO&NCIPI
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