An interactive Java applet called EngineSim is now available. With EngineSim, you can study the effects of compressor performance on thrust and fuel flow. To begin, choose Engine Design mode and Turbomachinery from the Design Variable menu. Most modern passenger and military aircraft are powered by gas turbine engines, also called jet engines. All types of jet engines have some parts in common.
All jet engines have a compressor to increase the pressure of the incoming air.
In either design, the job of the compressor is to increase the pressure of the flow. This number is always greater than 1.0. Using our station numbering the CPR is equal to pt3 divided by pt2, as shown on the slide. To produce the increase in pressure, the compressor must perform work on the flow. In the axial compressor, cascades of small airfoils are mounted on a shaft that turns at a high rate of speed.