Research Article

Influence of Weak Compressibility on the Hydrodynamic Performance Evaluation of Pump Turbines in the Pump Mode

Figure 15

Contour of entropy production rate Epro for 10-degree guide vane opening. (a) Q = 255 kg/s, (b) Q = 286 kg/s, (c) Q = 314 kg/s.
(a)
(b)
(c)