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Q8. The velocity of steam leaving the nozzles of an impulse turbine is 900 m/s and the nozzle angle is 20°. The blade velocity is 300 m/s and the blade velocity coefficient is 0.7.

a) Sketch the blade velocity diagram for the turbine. (4)

b) For a mass flow of 1 kg/s, and symmetrical blading, calculate EACH of the following:

(i) The blade inlet angle. (4)

(ii) The driving force on the wheel. (5)

(iii) The axial thrust (3)