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Q5. In a stage of a 50% reaction turbine the steam is dry and saturated at a pressure of 3.0 bar. The mean blade diameter is 800 mm, the blade height is 50 mm and the speed of rotation is 4500 rev/min. The absolute velocity of the steam at exit from the stage is in an axial direction. The blade outlet angle is 25°.

(a) Sketch the combined velocity diagram, showing all relevant velocities and angles.

(b) Determine EACH of the following:

(i) The blade power

(ii) The diagram efficiency.