[NVDave]

Exactly so.

All engines run on some variant of the “suck-squeeze-bang-push” cycle. The differences are:

1. How is the ignition performed?
2. Are the fuel:air ratios constant (as in the Otto gasoline engine) or variable (diesel and turbojet/fan engines)?
3. Where are you extracting the heat & pressure from the combustion? In a diesel, you’re using the piston to extract the energy from the pressure/temperature of the burning air/fuel mixture. In a turbodiesel, you’re using the piston, but then you’re scavenging some more heat+pressure from the exhaust and pushing that back into the engine in the form of higher charge air temps and pressures.

In a jet engine, you’ve done as you’re indicating — you’ve reduced the size of the piston to zero, and you’re running nothing but a huge honkin’ turbo, where you’ve stuffed an intermediate burn can between the input spool and output spool of the turbo. Oh, and you’ve put a longer shaft on the turbines. ;-)

[Old Professer]

Mind-reading not allowed around here - I should have read farther; then I could have made reference to your obviously previous post.

Are you still hanging around bars or is this blonde chick pulling my leg?

[Senormechanico]

“All engines run on some variant of the “suck-squeeze-bang-push” cycle.”

So does my wife.

[barb-tex]

Actually the heat is not scavenged but cooled to increase Pounds air fed to engine. Of course we turbo-charge to increase fuel burned per cycle.
barbra ann