what the purpose of turbines at the rear of the jet engine

[mehboob_iiui]

turbines in a jet engine

**broken link removed**

considering the diagram above, what the purpose of the turbines at the rear of the engine, and how does the engine get started..

 

[VSWR]

Re: turbines in a jet engine

See https://en.wikipedia.org/wiki/Jet_engine

 

[Kral]

Re: turbines in a jet engine

mehboob_iiui,
The turbines in the reare provide torque to spin the compressor turbines in front. The engine is started by a starter motor in a manner similar to that of an automobile engine. The starter motor is often used in a dual purpose manner to provide DC power to the aircraft.
Regards,
Kral