A turbine, by definition, provides zero thrust, because it works the other way (it extracts energy from the flow). What you meant to say was that the air flowi

A turbine, by definition, provides zero thrust, because it works the other way (it extracts energy from the flow). What you meant to say was that the air flowing through the engine core provides very little thrust, because most of its energy is being extracted by the turbine almost immediately after combustion.