Table 4
Information about the dominant frequency of points at different IGVFs (Q = Qd).
IGVF | Point |
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---|---|---|---|---|---|---|---|---|
Impeller |
Guide vane |
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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 |