How does thrust differ between a turbojet and a turbofan engine | One Minute Aeronautics Concepts
How does thrust differ between a turbojet and a turbofan engine | One Minute Aeronautics Concepts
Turbojets generate thrust by accelerating air entirely through the core, while turbofans bypass a large portion of air around the core, improving fuel efficiency and reducing noise, especially at subsonic speeds.
A turbofan engine produces more thrust than a turbojet engine because it pushes more air. This is possible because a turbofan engine has a ducted fan that bypasses some of the air around the core of the engine.
Explanation
Turbojet engine
A turbojet engine produces thrust by ejecting a high-energy gas stream from the exhaust nozzle. All of the air that enters the engine goes through the core, where compression, combustion, and expansion occur.
Turbofan engine
A turbofan engine has a ducted fan that bypasses some of the air around the core of the engine. This bypass air is cool and low-velocity, while the air that goes through the core is compressed, combusted, and expanded.
Thrust
The amount of thrust produced by a turbofan engine is the sum of the thrust from the core and the bypass air. The bypass air contributes between 30% and 70% of the total thrust.
Benefits of the turbofan engine
The turbofan engine was designed to improve the fuel consumption of the turbojet engine.
The turbofan engine combines the characteristics of a propeller engine and a jet engine.