Mitsubishi Heavy Industries Limited

Hideyoshi Isobe

Takashi Shiraishi

Hirotaka Higashimori

Koichi Sugimoto

A radial compressor includes an impeller which is rotatively driven, axially introduces air taken in through an air inlet passage formed in a housing, pressurizes the introduced air, and discharges the pressurized air in a radial direction, wherein an annular concave groove is formed in a peripheral wall of the air inlet passage of the housing, a rear end portion of an opening of the annular concave groove, which rear end portion meets the housing peripheral wall, is provided in the vicinity of a blade front end surface of the impeller, and the rear end portion of the opening of the annular concave groove is formed such that an axial projecting amount X thereof relative to the blade front end surface of the impeller is set to &#x2212;1T&#x2266;X&#x2266;1.5T (where T denotes the thickness of the distal portion of a blade).

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Nagasaki, Japan

Hideyoshi Isobe