Mitsubishi Hitachi Power Systems, Ltd.

Kohta Kawamura

Yasuo Takahashi

Chihiro Myoren

Tetsuro Morisaki

An axial compressor comprising liquid drop feed means for feeding liquid drops to an operating fluid of the compressor, a casing for forming a flow path through which the operating fluid flows down and a plurality of stages, each of which is composed of one continuous rotor blade row and one continuous stator vane row, the axial compressor being structured so that the liquid drops evaporate inside the compressor, characterized in that: the casing is provided with a cavity therein, and the cavity is formed by an outer casing and an inner casing which is enclosing a periphery of the rotor blade rows at the plurality of stages and forming internally a flow path of the operating fluid, and a flow path is provided for feeding the operating fluid to the cavity on a downstream side of a region forming the cavity of the inner casing.

Axial compressor and operation method of the same

An axial compressor that can remove an attachment within a groove of a casing and recover an effect of suppressing stall on rotor blades, and a gas turbine provided with the axial compressor, are provided. The axial compressor includes a compressor bodyand a sprayerfor spraying droplets in suction gas of the compressor bodyso that the droplets are introduced into the compressor bodyand evaporate. The compressor bodyincludes a casing, a rotor, rotor blades, and stator vanes. A grooveis formed in an inner circumferential surface of the casingso as to be positioned around rotor bladesarranged on a front stage side. A purge systemis provided that supplies high-pressure air to the groovethrough communication holes

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Tokyo, Japan

Kohta Kawamura