Rocket Engines
I'm trying to get my head around how both the Space Shuttle Main Engines and the Saturn's Rocketdyne J2 engines actually work.
Specifically what is a turbo pump, my take on it is it ups the pressure of the propellant prior to injection into the combustion bell.
What is a thrust chamber, is it the apex of the engine bell?
Lastly, does the liquid oxygen get routed through tubes on the outside of the engine bell, to cool it? How do they prevent the LoX from boiling off in the tubes.