// ORBITAL LOGISTICS AND PROPULSION TERM

Turbofan

A type of jet engine that uses a large fan at the front to draw in air, with some air bypassing the core engine to provide additional thrust. This design makes them more fuel-efficient and quieter than older jet engines.

Turbofan — illustration from Wikipedia
Image via Wikipedia

TECHNICAL DEFINITION

A type of jet engine characterized by a large fan at the front that bypasses a significant portion of incoming air around the core engine, generating thrust from both the fan (bypass air) and the exhaust jet, offering higher fuel efficiency and lower noise than turbojets.

BACKGROUND

The fuel economy in aircraft is the measure of the transport energy efficiency of aircraft. Fuel efficiency is increased with better aerodynamics and by reducing weight, and with improved engine brake-specific fuel consumption and propulsive efficiency or thrust-specific fuel consumption. Endurance and range can be maximized with the optimum airspeed, and economy is better at optimum altitudes, usually higher. An airline efficiency depends on its fleet fuel burn, seating density, air cargo and passenger load factor, while operational procedures like maintenance and routing can save fuel.

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SYNONYMS & ALIASES

  • Bypass jet
  • fanjet
  • high-bypass engine
  • low-bypass engine

USAGE NOTE

Most modern commercial airliners are powered by turbofan engines due to their efficiency.

DEVELOPERS

Organizations developing technology related to Turbofan.

  • GE Aerospace

    A world-leading provider of jet and turboprop engines, components, and integrated systems for commercial and military aircraft. They develop and manufacture a wide range of turbofan engines, including the GE9X, LEAP, and F414.

  • Rolls-Royce

    A global power systems company that designs, manufactures, and services integrated power systems for aerospace. They are a leading producer of turbofan engines for large commercial aircraft (e.g., Trent series) and business jets, as well as military applications.

  • Pratt & Whitney

    A subsidiary of RTX Corporation, Pratt & Whitney is a global leader in the design, manufacture, and service of aircraft engines and auxiliary power units. They are renowned for their PurePower Geared Turbofan (GTF) engines and military turbofans.

  • Safran Aircraft Engines

    A French aerospace engine manufacturer, part of the Safran group. They develop and produce engines for commercial and military aircraft, including turbofans. Safran is a 50/50 partner with GE in CFM International, which produces the widely used LEAP and CFM56 turbofan engines.

  • Honeywell Aerospace

    Provides aircraft engines, including turbofan engines for business jets and regional aircraft, and auxiliary power units (APUs) that utilize turbofan-like technology, along with various other aerospace products and services.

  • MTU Aero Engines

    Germany's leading engine manufacturer, developing, manufacturing, and servicing civil and military aircraft engines and industrial gas turbines. They are a key partner in many turbofan engine programs with major global players, contributing significantly to engine components and modules.

  • IHI Corporation

    A Japanese heavy industry manufacturer involved in the development and production of turbojet and turbofan aircraft engines for both military and commercial applications, as well as engine components and parts for other major engine makers.

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