Chapter 6 Question 19 Answer:

(1) TT1 = T1 > Tatm

The flow stagnates on a moving body (the spinning fan blade). Thus the scenario is similar to a supersonic aircraft flying through the atmosphere. The stagnation temperature is elevated above the static temperature of the atmosphere. On the blade itself, the static and stagnation temperatures are the same, since the flow is not moving relative to the blade.

Class Response (2003):

Class Response (2002):