A Comparative Study of Impeller Modification Techniques on the Performance of the Pump as a Turbine

Table 1

Design parameters of the pump in direct mode.

Parameters	Numerical value	Parameters	Numerical value
Volume flow rate	24.5 m^3/h	Specific speed	16
Pressure head	16.5 m	Blade tip diameter	0.16 m
Efficiency	72%	Number of blades	6
Rotating speed	2900 rpm	Suction head	0 m
Maximum power	3 hp	Working fluid density	1000 kg/m^3