PROBLEM 1 In an axial flow pump, the rotor has an outer diameter of 75 cm and an inner diameter of 40 cm, it rotates at 500 rpm. At the mean blade radius, the inlet blade angle is 12 deg and the outlet blade angle is 15 deg Sketch the corresponding velocity diagrams at inlet and outlet and estimate the following: ) the head the pump will generate, B 17 6m C5.4m D 19.8 m A. 11.2 m (ii) the discharge or rate of flow in l/s A 705 Vs B. 203 /s C407 Us D 609 Vs (iii) the shaft h.p input required to drive the pump and B 230 hp C:300 hp D 401 hp A 170 hp (N) the specific speed of the pump. B 65 C.45 D.75 A 80

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