| 摘要 |
PROBLEM TO BE SOLVED: To provide a dual fluid gas turbine, in which high output can be provided at low cost, and in which cooling effect similar to that in steam cooling can be achieved in simple structure. SOLUTION: By using steam before injection of a steam injection turbine, high-temperature parts such as the turbine and inner walls of a combustor can be effectively cooled. By using steam before injection for cooling the high-temperature parts, cooling effect similar to that in a steam-cooled gas turbine can be achieved. Steam used for cooling is emitted to a combustion gas passage in the end, so that application of steam cooling to rear end parts, blade end parts, and shroud end parts becomes easy. This enables cooling of film, which provides excellent cooling effect compared to the steam-cooled gas turbine. Since steam used for cooling is emitted to the combustion gas passage in the end, steam released to the combustion gas passage works in the turbine, thereby output of the dual fluid gas turbine is increased. COPYRIGHT: (C)2006,JPO&NCIPI
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