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Q5. In one stage of a 50% reaction turbine, the pressure is 1 bar and the steam is dry saturated.

The blade exit angle is 20 o and the blade speed ratio is 0.7.

The blade height is 8.5 % of the mean blade ring diameter,

The stage develops 600 kW at a mass flow of 64.8 tonne/hour.

(a) Sketch the stage velocity vector diagram identifying the velocities. (3)

(b) Calculate EACH of the following:

(i) The mean blade speed; (4)

(ii) The mean diameter of the blade ring; (4)

(iii) The rotor speed; (2)

(iv) The blade inlet angle. (3)