A source of power is now required to turn the compressor. To
extend the volume of air, fuel and ignition are introduced and
combustion takes place. This greatly expands the volume of gas
available.
In the path of the now rapidly expanding gases, another fan or
turbine can be placed. As the gases pass through the blades of the
turbine, they cause it to rotate at high speed. By connecting the
turbine to the compressor, we have a mechanical means to rotate the
compressor to replenish the air supply. The gases still possessing
energy are discharged to the atmosphere through a nozzle that
accelerates the gas stream. The reaction is thrust or movement of
the tube away from the escaping gas stream. We now have a simple
turbojet engine.
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