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Air at a pressure of 101 kPa and temperature of 288 K enters an axial compressor...

Air at a pressure of 101 kPa and temperature of 288 K enters an axial compressor stage with a velocity of 170 m/s. There are no guide vanes, so the air enters in the axial direction only. When traveling through the rotor, the air turns 15 degrees. This means the angle of the relative velocity with respect to the axis is 15 degrees greater when entering the rotor than when it leaves. The rotor spins at 8000 rpm and has tip and hub diameters of 0.66 m and 0.46 m, respectively.  

                a)            Determine the mass flow through the compressor

                b)            Calculate the power required for this stage using the mean radius of the flow area

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