Repeat Prob. 17-146 for helium.
Prob. 17-146
Air is heated as it flows sub sonically through a 10 cm 10 cm square duct. The properties of air at the inlet are maintained at Ma1 =0.4, P1 =400 kPa, and T1 =360 K at all times. Disregarding frictional losses, determine the highest rate of heat transfer to the air in the duct without affecting the inlet conditions.
