Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion

The turbojet is an airbreathing jet engine, typically used in aircraft. It consists of a gas turbine with a propelling nozzle. The gas turbine has an air inlet, a compressor, a combustion chamber, and a turbine (that drives the compressor). The compressed air from the compressor is heated by burning fuel in the combustion chamber and then allowed to expand through the turbine. The turbine exhaust is then expanded in the propelling nozzle where it is accelerated to high speed to provide thrust.

And even the shaft of turbine is connected to the compressor, so the work done by the turbine is useful for the compressor, compressor is used to compressed the gas.

Turbine is needed in turbo jet engine because compressed air from the compressor first heated in the combustion chamber and then advanced through the inlet of the turbine, then turbine exhaust is expanded in the propelling nozzle, then turbo jet accelerated.