| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal compressor in which inconvenience such as shaft vibration caused by swirling stall is suppressed and performance reduction caused by a friction loss or the like is suppressed.SOLUTION: In a centrifugal compressor 10 including a diffuser part 15 circulating a fluid discharged from an impeller 13, a passage width W2 of the diffuser part 15 at an inflow position where the fluid flows into the diffuser part 15, is narrower than a passage width W1 of the impeller 13 at a discharge position where the fluid is discharged from the impeller 13 and at a downstream side of the inflow position of the diffuser part 15, a passage width enlarged part 15c is provided which is wider than the passage width W1 of the diffuser part 15 at the inflow position. |
