In a multi-stage Parson’s reaction turbine at one of the stages the rotor diameter is 125 cm and speed ratio 0.72. The speed of the rotor is 3000 rpm. Determine
(i) The blade inlet angle if the blade outlet angle is 22°.
(ii) Diagram efficiency.
(iii) Percentage increase in diagram efficiency and rotor speed if the turbine is designed to run at the best theoretical speed.