Abstract: A gas turbine combustor according to at least one embodiment, includes: a less combustible fuel flow control part for controlling, independently of each other, amounts of less combustible fuel supplied to a first fuel injector and a second fuel injector; a highly combustible fuel flow control part for controlling, independently of each other, amounts of highly combustible fuel having a higher combustion speed than the less combustible fuel and supplied to the first fuel injector and the second fuel injector; and a controller configured to control the less combustible fuel flow control part and the highly combustible fuel flow control part such that a relative ratio of a first ratio of the highly combustible fuel to whole of first fuel injected by the first fuel injector and a second ratio of the highly combustible fuel to whole of second fuel injected by the second fuel injector changes according to an operating condition of a gas turbine.

Abstract: A premixed combustion burner including: an outer tube having an inlet opening on a first side in an axial direction and an outlet opening on a second side in the axial direction; an inner tube formed in a cylindrical shape extending in the axial direction and spaced inside the outer tube, and forming a film air flow path between the inner and outer tubes; and a strut extending inward from the inner wall surface of the outer tube and supporting the inner tube. An end of the inner tube on the first side is located further towards the second side than the outer tube inlet opening. An end of the inner tube on the second side is located further towards the first side than the outlet opening of the outer tube. The outer tube, the strut, and the inner tube are formed with a fuel injection flow path.

Abstract: A spoke receiving hole extends through a flange formed on a rim so as to incline by a predetermined angle in a radial direction with respect to a line perpendicular to a wheel center plane. A head of a spoke seats on a seating surface provided on one side surface of the spoke receiving hole in contact at a region I on the side closer to a rim body, and a head straight portion of the spoke contacts with an edge portion K of an opening on the side distant from the rim body to which a hole portion directly opens on the side opposite from the seating surface of the spoke receiving hole.

Abstract: A spoke receiving hole is perforated through a flange formed on a rim so as to incline by a predetermined angle in a radial direction with respect to a line perpendicular to a wheel center plane. A head of a spoke seats on a seating surface provided on one side surface of the spoke receiving hole in contact at a region I on the side closer to a rim body and a head straight portion of the spoke contacts with an edge portion K of an opening on the side distant from the rim body to which a hole portion directly opens on the opposite side from the seating surface of the spoke receiving hole.