Table 4
Information about the dominant frequency of points at different IGVFs (Q = Qd).
| IGVF | Point |
|||||||
|---|---|---|---|---|---|---|---|---|
| Impeller |
Guide vane |
|||||||
| R1C | R2C | R3C | R4C | S1C | S2C | S3C | S4C | |
| 3% | 0.5fn | 11fn | 11fn | 11fn | 4fn | 4fn | 4fn | 4fn |
| 9% | 11fn | 11fn | 11fn | 11fn | 4fn | 4fn | 4fn | 4fn |
| 15% | 0.5fn | 11fn | 11fn | 11fn | 4fn | 4fn | 4fn | 4fn |
| 21% | 0.5fn | 11fn | 11fn | 0.5fn | 4fn | 4fn | 4fn | 4fn |