Centrifugal compressor having a non-axisymmetric self circulation casing treatment

摘要

A centrifugal compressor includes an asymmetric self-recirculating casing treatment that includes, on an inner face of a casing 10, a suction ring groove 1, a ring guide channel 2 and a back-flow ring groove 3 to form a self-recirculating channel. A position or a width of the suction ring groove 1 is distributed in an arc shape in a circumferential direction, and the arc has a center angle ± in a range of 0±‰¤30°.