公开(公告)号：WO2020040774A1

公开(公告)日：2020-02-27

申请号：PCT/US2018/047745

申请日：2018-08-23

Applicant: DRESSER-RAND COMPANY

Inventor： SRINIVASAN, Ravichandra ,  SARETTO, Silvano R. ,  ALLES, Katherine ,  BROWN, Paul Morrison

IPC: F04D29/28 ,  F04D29/44 ,  F04D29/66 ,  F04D21/00

Abstract: Process fluid flow in the primary flow passage (70) of a compressor (20) is altered by selective inclusion of one or more tooth-like, annular circumferential flanges (48) in its secondary flow passage (72). The compressor's secondary flow passage is defined between opposing surfaces of a hub (40) of the impeller (26) and the opposing hub side (64) of the housing (21). The annular circumferential flange is coupled to the hub of the impeller and/or the hub side of the compressor housing within the secondary flow passage. A compressor incorporating one or more of the annular circumferential flanges in its secondary flow passage achieves more uniform flow velocity flow within the primary flow passage.