Research Article

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

Figure 16

Contour of entropy production rate Epro for 12-degree guide vane opening. (a) Q = 266 kg/s, (b) Q = 324 kg/s, (c) Q = 378 kg/s.
(a)
(b)
(c)