The first and simplest type of gas turbine is the turbojet. How does a turbojet work?
On this slide we show a computer animation of a turbojet engine. The parts of the engine are described on other slides. Here, we are concerned with what happens to the air that passes through the engine. Large amounts of surrounding air are continuously brought into the engine inlet. (In England, they call this part the intake, which is probably a more accurate description, since the compressor pulls air into the engine.) We have shown here a tube-shaped inlet, like one you would see on an airliner. But inlets come in many shapes and sizes depending on the aircraft’s mission. At the rear of the inlet, the air enters the compressor. The compressor acts like many rows of airfoils, with each row producing a small jump in pressure. A compressor is like an electric fan. We have to supply energy to turn the compressor. At the exit of the compressor, the air is at a much higher pressure than free stream. In the burner a small amount of fuel is combined with the air and ignited. (In a typical
