0 Members and 1 Guest are viewing this topic.
it doesn't have to be jet fuel. As it turns out, turbine engines have a nice high-pressure exhaust stream available and so we can extract some work to run the compressor.
It does NOT take any fuel to compress the air.
For a while, the engine will actually fall at a contant velocity. The incoming air still gets compressed. But,there's no source of heat so the engine makes negative net thrust (or drag). The acceleration due to gravity can match the deceleration due to aerodynamic drag.
there's no physical, fluidic, or thermal linkage to transfer work between the exhaust and the intake.
I can say that the air must be compressed to enable fuel-air combustion.