Experimental Study of a Low-Specific Speed Francis Model Runner during Resonance

<div>Instantaneous illustration of the DM2 excitation. A sinusoidal signal with 28 periods is divided into 30 equal segments. The intersection line for each segment represents the pressure in each of the 30 runner channels. By plotting a curve through the intersection points, the overall pressure with 2 diametral modes appears.</div>

Shock and Vibration

fig1

Figure 1

Figure 1: Experimental Study of a Low-Specific Speed Francis Model Runner during Resonance 