Could a jet engine be started in reverse and run back-words?

Question

Could a jet engine be started in reverse and run back-words?

Answer 1

No, the blades force the air to the rear (combustion chamber).

Answer 2

no

Answer 3

no.

the turbine would not provide enough compression, and the fuel will burn in the last compressor stage.

Answer 4

No it will not and the reason is that the air is compressed to be burned by the compressor blades and then the air is forced into the burner cans where the fuel is injected. Then the very hot exhaust air goes thru the turbine blades which extract energy to power the compressor blades and the engine runs. With reverse air flow the turbine blades would be receiving incoming air and the blades are designed for outflow so the compression (necessary for burning) would not be significant plus the compressor blades are not designed for the temperatures of exhaust if you were successful in getting a lightoff. I could go on but you get the idea.

Answer 5

No.

It wouldnt be practical structurally, aerodynamically and thermodynamically.

The jet engine is based on the Brayton's cycle, where the isobaric combustion is the second process. If you reverse it, the cycle is interrupted and you wont get a work output.