Air at 101.3 kPa and 15°C enters and leaves an axial-flow compressor stage with a velocity of 150m/s without swirl. The stage has a tip radius of 56cm and a hub radius of 35cm and rotates at 8000 rpm. The air is turned through 12° as it passes through the rotor with negligible incidence and deviation from the blades,
(a) Determine the blade angles at leading and trailing edges of both the rotor and stator at the mean radii,
(b) Calculate the mass flow rate and the power required for each stage.