An interactive Java applet for this slide is now available. Using EngineSim, you can study the effects of turbine performance on thrust and fuel flow. Most modern passenger and military aircraft are powered by gas turbine engines, which are also called jet engines. There are several different types of jet engines. But all jet engines have some parts in common.
All jet engines have a turbine to drive the compressor.
The job of the turbine is to extract energy from the heated flow exiting the burner. The turbine is connected to the shaft, which is also connected to the compressor. As the flow passes through the turbine, the total pressure and temperature decrease. This number is always less than 1.0. Using our station numbering , the TPR is equal to pt5 divided by pt4, as shown above.