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

Table 1

Geometric parameters of the objective pump turbine.

Parameters	Values	Unit
Impeller radius of leading edge at shroud side r1s	150	(Mm)
Impeller radius of leading edge at hub side r1h	70	(Mm)
Impeller radius of trailing edge r2	257	(Mm)
Impeller width at outlet b2	570	(Mm)
Impeller blade number Z1	9	(—)
Guide vane blade number Z2	20	(—)
Stay vane blade number Z3	20	(—)