Research Article
On the Rotor Stator Interaction Effects of Low Specific Speed Francis Turbines
Figure 7
The angular shift from S4 to S1, S2, and S3 relative to runner rotation. The theoretical shift according to the sensor position as shown in Figure 4 is indicated with the red stems. The theoretical shift is normalized to sensor position S4. The subscript k is the sensor number S1 to S4.