Tests on an axial compressor revealed that the relative mach number at thee rotor inlet as 0.7 when the flow coefficient was 0.5. the flow angle exiting the rotor is 300 from the axial direction and the velocity triangles are symmetric at the blade mean radius. if the inlet stagnation temperature is 289 k, determine the stagnation temperature rise obtained under the above conditions

Apreheater involves the use of condensing steam at 100°c on the inside of a bank of tubes to heat air that enters at 1 atm and 25°c. the air moves at 5 m/s in cross flow over the tubes. each tube is 1 m long and has an outside diameter of 10 mm. what is the minimum value of nl needed to achieve an outlet temperature of t 75 c? what is the corresponding pressure drop across the tube bank?