Originally Posted by
hawk37
While testing on the ground, if one puts the throttles up to a mid point, the air coming in is quite warm, though not at an excessive rate or speed, even in the winter.
Shouldn't the amount of heating due to compression equal the amount of cooling due to expansion?
Sorry for what seems a simple question. Anyone with ideas?
Hawk
Yes. Except you have not done the whole process adiabatically.
The air has been given a huge amount of Kinetic Energy by the compressors as well as the static pressure rise. The KE is responsible for the temperature rise.