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Q5. In a 50 % reaction turbine stage, the steam leaves the fixed blades with a velocity of 400 m/s, the blade speed ratio is 0.7332 and the fixed blade outlet angle is 35°.

The mean diameter of the blade ring is 800 mm.

(a) Sketch The velocity vector diagram, labelling ALL The velocities and angles. (5)

(b) Calculate EACH of the following:

(i) The turbine rotor speed of rotation in rev/min; (3)

(ii) The blade inlet angle; (3)

(iii) The diagram efficiency. (5)