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Q8) An impulse turbine has a nozzle at the entrance angle is 16°, the blade velocity is 360 m/s, and the blades are symmetrical and have an angle of 34°.

If the blade velocity coefficient is 0.94 and the mass flowrate of the steam is 1.67 kg/s.

(a) Calculate the nozzle exit velocity if the change in enthalpy across the nozzle is 490 kJ/kg.(2)

(b) Sketch a blade velocity diagram labelling all significant angles and velocities. (3)

(c) Using Fig Q8, calculate the diagram power. (11)