A thin, flat object is exposed to air flow in the outer atmosphere where air temperature and pressure are −50 ◦C and 7 kPa, respectively. Air flows parallel to the object at a Mach number of 0.5. The...

A thin, flat object is exposed to air flow in the outer atmosphere where air temperature and pressure are −50 ◦C and 7 kPa, respectively. Air flows parallel to the object at a Mach number of 0.5. The effect of radiation heat transfer can be neglected.

(a) Assuming that the plate is adiabatic, calculate the surface temperature of the plate at a distance of 4 cm from the leading edge.

(b) If the surface temperature at a distance of 4 cm from the leading edge is measured to be 25◦C, find the rate and direction of heat transfer between the surface and the air at that location.