Patent ID: 7340881

Claim:
A gas turbine combustor comprising a combustor liner contained in a combustor outer casing, which is mounted to a main housing of a turbine, and forming a combustion chamber therein, a transition inner duct for introducing combustion gas generated in said combustor liner, and a transition outer duct disposed around said transition inner duct, wherein: said transition inner duct and said transition outer duct are disposed in said main housing, inlet openings for causing a fluid introduced from said compressor to flow into a space defined between said transition outer duct and said transition inner duct are formed at both a joint portion between said transition inner duct and said combustor liner and a joint portion between said transition inner duct and said turbine, and said transition outer duct is formed as an extraction flow passage for extracting the fluid having flown in through said inlet openings to the outside of the main housing.