| 摘要 |
Provided is a centrifugal compressor such that a malfunction such as shaft vibration due to rotation stall and degradation of performance due to friction loss and the like are suppressed. The centrifugal compressor (10) is equipped with a diffuser section (15) for circulating a fluid discharged from an impeller (13). The flow path width (W2) of the diffuser section (15) at an inflow position where the fluid flows into the diffuser section (15) is narrower than the flow path width (W1) of the impeller (13) at a discharge position where the fluid is discharged from the impeller (13), and an enlarged-width flow path section (15c), which is wider than flow path width (W2) of the diffuser section (15) at the inflow position, is provided downstream of the inflow position of the diffuser section (15). |
