Patent ID: 9644639
Date: 2017-05-09
CPC Classifications: F04D

Claim:
1. A centrifugal compressor, comprising: an impeller mounted to a shaft and rotatable about a shaft axis, the impeller having a plurality of impeller vanes; and an impeller shroud enclosing the impeller, the impeller shroud having a shroud surface having inducer and exducer portions, the shroud surface surrounding and radially spaced apart from the impeller vanes to define a fluid flow path between the shroud surface and the impeller vanes, at least one groove defined by opposed wall segments which extend into the shroud surface within the exducer portion, the wall segments inclined at a nonzero angle relative to a normal of the shroud surface at the at least one groove in a direction opposite to the fluid flow path along the shroud surface, the opposed wall segments being linked by a groove bottom segment.