A compounded impulse turbine has two rows of moving blades
separated by a fixed row of blades. The steam leaves the nozzle at an angle of
20° with the direction of motion of blades. The blades exit angles are 1st
moving 30°,fixed 22° and 2 nd moving 30°. If the adiabatic heat drop
of nozzle is 186.2 kl/kg with nozzle efficiency of 90%, calculate the blade
velocity necessary, if the final velocity of steam is to be axial. Assume a
loss of 15% in the relative velocity of all blade passages. Also obtain the
blade efficiency and stage efficiency.
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