Open Access

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

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