DieselShip's Online Content Library

Q8. An impulse turbine has a nozzle at the entrance.

(a) Calculate the nozzle exit velocity if the change in enthalpy across the nozzle is 520 kJ/kg

(b) The turbine has a nozzle extrance angle 21°, the blade velocity is 400m/s and the blades are symmetrical and have an angle of 33.5°. if the blade velocity coefficient is 0.97 and the mass flow rate of the steam is 2.1 kg/s:

(i) sketch the blade velocity diagram for the turbine; (4)

(ii) calculate the diagram power. (9)