The core working principle of turbofan (turbofan) engine is to drive the fan to rotate through the turbine, and divide the air into two paths: the inner duct air participates in combustion to produce high-temperature combustion gas to drive the turbine, and the outer duct air is directly accelerated and discharged, and the two together generate thrust. This design significantly improves propulsion efficiency and fuel economy, especially for subsonic flight.
Basic structure of turbofan engine
Turbofan engine is mainly composed of the following core components:
Fan: Located at the front end of the engine, driven by the low-pressure turbine, inhaling air and dividing it into two paths: the inner duct and the outer duct.
Compressor: The inner duct air is compressed by the multi-stage compressor and enters the combustion chamber.
Combustion chamber: The compressed air is mixed with the fuel and burned to produce high-temperature and high-pressure combustion gas.
Turbine: The high-temperature combustion gas drives the high-pressure turbine (driving the compressor) and the low-pressure turbine (driving the fan), and the remaining energy is discharged through the tail nozzle.
Bypass: Part of the air inhaled by the fan bypasses the core engine and is directly accelerated and discharged, mixing with the inner duct combustion gas to generate additional thrust.
