The shaft of small axial flow turbine turns at 20000 rpm, and the blade speed is U = 250 m/s. The axial velocity of the fluid leaving the stator is Vat = 175 m/s. The angle at which the absolute velocity leaves the stator blades is a, = 67, the blade angle of the rotor is B, - 60, and the absolute velocity leaves the rotor at the angle az = - 20. Find the following. (a) the mean radius of the blades, (b) the angle of the relative velocity entering the rotor, (c) the magnitude of the axial velocity leaving the rotor, (d) the magnitude of the absolute velocity leaving the rotor, (e) the specific work delivered by the stage. %3D N. B1 B2 Vat 20000 rpm 67 -20 -60 175 m/s 250 m/s