DIFFUSER OF CENTRIFUGAL COMPRESSOR, AND CENTRIFUGAL COMPRESSOR EQUIPPED WITH THE DIFFUSER

摘要

PROBLEM TO BE SOLVED: To provide a diffuser capable of suppressing exciting force to the impeller blades resulting from a static pressure field generated around diffuser blades, and provide a centrifugal compressor equipped with the diffuser.;SOLUTION: The diffuser has a pair of annular, mutually facing wall surfaces 2 formed downstream of a centrifugal impeller and the plurality of diffuser blades 3 installed between the mutually facing wall surfaces 2 in the circumferential direction, wherein the wall surface 2 located upstream of the front edge of each diffuser blade 3 is furnished with a convex shape 10 which is convex with respect to the flow passage 6 on the pressure surface side 7 of the diffuser blade 3, while a concave shape 11 being concave with respect to the passage 6 is formed on the negative pressure surface side 8 of the diffuser blade 3.;COPYRIGHT: (C)2012,JPO&INPIT