
Originally Posted by
taslucas
Why do they cool them with oil or water if they operate better hot?
Isnt the only reason they are hot is because they are fed by exhaust so in theory if you had forced cold air feeding it instead hot exhaust the whole thing would run even better?
I'm definitely no expert!
But is this right?
Heat is energy but the heat energy is a by-product of the combustion process and during combustion the energy that's turned into heat is lost energy as it's not turned back into kinetic energy. It's the pressure, or kinetic energy, of the exhaust being forced out of the engine that spins the turbine and continues to be kinetic energy which forces the air in.