CENTRIFUGAL COMPRESSOR

摘要

A centrifugal compressor includes: a compressor housing 15; an impeller wheel 7 for compressing intake air, disposed inside the compressor housing; a parallel flow generating unit 51 for rectifying the intake air flowing in via an intake port 23 to be parallel to the direction of a rotation shaft 9; and a recirculation channel 41 for returning a part of the intake air in an outer circumferential section of the impeller wheel to an upstream side of the impeller wheel 7. The parallel flow generating unit 51 includes a parallel flow generating part 52 including a plurality of guide vanes 55 and a central intake-air flowing section 59 which is a space surrounded by the parallel flow generating part 52. An intake-air outflow direction from an upstream opening 45 is oriented toward the parallel flow generating part 52.