Originally posted by MrDick
6 parts to Jet engine
inlet to diffuser - free stream
diffuser exit - compressor entrance - free stream slowed, pressure raised
compressor exit - burner entrance - pressure raised (work done)
burner exit - turbine entrance - fuel burned temperature raised
turbine exit - nozzle entrance - temperature lower (work extracted)
nozzle exit - pressure lower velocity raised thrust produced
temperature, presssure, velocity, mass are distinct at each location.
-MrD
Not quite how I was taught in FAR-147 school, but fairly close.
An easier way to think of it is the 5 events of an internal combustion engine:
Intake, compression, ignition, power, exhaust.
In a recip they happen at different times in the same spot (Dont even THINK of mentioning Wankle-type rotaries like the Mazda Powersport. They're an oddball.)
In a jet, it's at the same time, in different spots. And in the order I mentioned is about the order it happens in.
Intake in the front, compression in the compressor section (or sections), ignition in the combustion or 'hot' section, power at the turbine wheels, exhaust at the back end.
For a reheater, you have a ramjet at the end of the turbojet/fan, so the exhaust stage for the turbine becomes the intake stage for the reheater section. The same events occur, though usually in a much more confined space (the distance between compression and combustion can, in some types, be measured in inches).
EDIT: Foxy STILL cant spell...
