Gas Turbine Engines: Expansion Away From Compressors

[Mohankpvk]

In a gas turbine engine(in aircrafts), why doesn't the gas after expansion move backwards towards the compressor?
.How is it that it expands away from the compressor(rotating the turbine blades)?
Will the pressure of air at the end of the compressor before the combustion chamber be higher than the pressure after combustion(of the hot gas)?

 

[russ_watters]

In a gas turbine engine(in aircrafts), why doesn't the gas after expansion move backwards towards the compressor?

Its pressure is dropping (because it is expanding), so it has to move backwards.

How is it that it expands away from the compressor(rotating the turbine blades)?
Will the pressure of air at the end of the compressor before the combustion chamber be higher than the pressure after combustion(of the hot gas)?

The pressure is highest right after compression and drops as it goes toward the outlet nozzle.

 

[Mohankpvk]

Its pressure is dropping (because it is expanding), so it has to move backwards.

The pressure is highest right after compression and drops as it goes toward the outlet nozzle.
View attachment 228679

Nice answer.