Patent ID: 11879359
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A transition piece provided to a combustor that supplies a gas turbine with a combustion gas generated by combusting inside a combustor liner a fuel together with compressed air compressed in a compressor of a gas turbine engine, the transition piece connecting the combustor liner and the gas turbine and being formed of a plate material in a tubular form in such a manner that the transition piece separates an outer compressed air main flow path that supplies the compressed air from the compressor to the combustor and an inner combustion gas flow path that supplies the combustion gas from the combustor liner to the gas turbine from each other, the transition piece comprising:
a first flow path group that is formed by arraying in a circumferential direction of the transition piece a plurality of in-wall flow paths that extend inside the plate material from a side closer to the gas turbine to a side closer to the combustor liner; and
a second flow path group that is positioned on a side closer to the combustor liner than the first flow path group is and that is formed by arraying in the circumferential direction of the transition piece a plurality of in-wall flow paths that extend inside the plate material from the side closer to the gas turbine to the side closer to the combustor liner, wherein
each in-wall flow path in the first flow path group and the second flow path group has an inlet that is located at one end section in a flow direction of the combustion gas and that faces the compressed air main flow path, and an outlet that is located at another end section in the flow direction of the combustion gas and that faces the combustion gas flow path,
an installation area of the first flow path group and an installation area of the second flow path group partially overlap in the flow direction of the combustion gas by a predetermined overlap amount, and
the predetermined overlap amount is set larger for a portion where a shape change of the transition piece is relatively large, as compared with a portion where the shape change of the transition piece is relatively small,
wherein the shape change is a curvature of the plate material, a cross-sectional area size change rate of the transition piece, or a width change rate of the transition piece.