The PW1000.
No stators shown. In this cutaway.
Imagine the engine as it is, and then somehow turn it over to around 5000 PM, the add ignition and fuel.....whats going to happen?
Fuel will be added to an ambient pressure airflow and burn a bit like a blow torch, for a while.
After the starting source is gone, the engine will not produce the airflow to turn the turbine..efficiently enough to self sustain. It will wind down to zero RPM.
The air has to be compressed.