1. Turbofan engine (referred to as turbofan engine, English: Turbofan) is a kind of aircraft engine, which is developed from turbojet.
2. Compared with turbojet engine, the main feature of turbofan engine is that the area of the first stage compressor is much larger, and it is also used as an air propeller (fan) to push back part of the inhaled air through the external culvert.
3. The turbofan engine is most suitable for use at a flight speed of 400 to 1000 km, so most aircraft now use a turbofan engine.
