Power engineering

4. In a single-stage impulse turbine, the nozzles discharge the steam onto the blades at an angle of 25° to the plane of rotation and the fluid leaves the blades with an

absolute velocity of 300 m/s at an angle of 120° to the direction of motion of the

blades. If the blades have equal inlet and outlet angles and there is no axial thrust,

estimate:

(i) Blade angle

(ii) Power produced per kg/s flow of steam

(iii) Diagram efficiency.