Discuss the following:
Q: The air passage for cooling a gas turbine vane can be approximated as a tube of 3-mm diameter and 75-mm length. The operating temperature of the vane is 650°C, and air enters the tube at 427°C.
(a) For an air flow rate of 0.18 kg/h, calculate the air outlet temperature and the heat removed from the vane.
(b) Generate a plot of the air outlet temperature as a function of flow rate for 0.1 < m="">< 0.6="" kg/h.="" compare="" this="" result="" with="" those="" for="" vanes="" having="" 2-="" and="" 4-mm-diameter="" tubes,="" with="" all="" other="" conditions="" remaining="" the="" same.="">