The mean radius of an axial flow reaction turbine is 2.6 ft. and the axial velocity is 25 ft./s. The wicket gates are turned at an angle such that relative velocity at the inlet flow makes an angle of...

 The mean radius of an axial flow reaction turbine is 2.6 ft. and the axial velocity
is 25 ft./s. The wicket gates are turned at an angle such that relative velocity at the
inlet flow makes an angle of -45° with the blade velocity. The wheel and hub radii
are 3.6 ft. and 1.6 ft., respectively. The turbine rotates at 240 rpm. If water leaves the
blade in a purely axial direction, calculate H and all relevant angles.
Ans: H=81.87 ft.; α1=31.8°; β2=20.93°