On the Rotor Stator Interaction Effects of Low Specific Speed Francis Turbines

Table 2

Uncertainty budget for RSI first and second harmonic amplitudes, BEP F99.

Sensor	1Hz Repeatability [kPa]	Amplitude RMS of first harmonic RSI [kPa]	Relative Uncertainty [%]	Amplitude RMS of second harmonic RSI [kPa]	Relative Uncertainty [%]
S1	0.002	0.404	0.50	0.028	7.2
S2	0.005	0.462	1.1	0.018	28
S3	0.002	1.218	0.16	0.064	3.1
S4	0.002	1.118	0.18	0.098	2.0