A jet engine is a form of turbine engine.
A turbine works by having high-pressure gas passing through turbine blades, causing the blades to rotate the shaft and producing power. The high-pressure gas can be steam from a boiler, or it can come from direct combustion.
In the diagram thackney posted at #70, you have two generation stages. The upper generator is run by the gas turbine (essentially a stationary jet engine with the shaft connected to the generator). The upper stage does not use water. To get maximum efficiency, the hot exhaust from the top stage is used to boil water which goes to the smaller steam turbine in the lower half of the diagram. You don't need the second stage if you prefer compactness over fuel efficiency.
Did any body say a jet engine and a turbine engine were not similar, if they did I missed that, a ramjet is also similar. They tried to make turbine motors for trucks years ago, they never could get a handle on the heat.