Definition

1. Noun:
   • A type of jet engine in which a turbine-driven fan compresses incoming air before it enters the combustion chamber, providing increased thrust and efficiency compared to early jet designs. It is the common powerplant for modern commercial airliners and many military aircraft.

Usage

The term "turbojet engine" is used to specify the technical design of an aircraft's propulsion system. It distinguishes this type from other jet engines like turboprops or ramjets. It functions as the subject or object in a sentence describing aircraft mechanics or technology.

Examples

• The aircraft's turbojet engine produces 50,000 pounds of thrust.
• Engineers are developing a more fuel-efficient turbojet engine.
• A key component of the turbojet engine is the fan, which is driven by the turbine.

Advanced Usage

• Technical Context: In engineering, the term precisely denotes an air-breathing engine operating on the Brayton cycle, where all the thrust is produced by the exhaust jet. Modern high-bypass turbofan engines are a direct evolution of the basic turbojet principle.
• Historical Context: The term is sometimes used to distinguish early, low-bypass jet engines from modern high-bypass turbofans, even though both are technically in the turbojet family.

Variants and Related Words

• Turbojet (n): A common shortened form of "turbojet engine." It can also refer to an aircraft powered by such an engine.
  • The new fighter is powered by a twin-spool turbojet.
• Turbofan engine (n): A modern, efficient derivative of the turbojet engine where a large fan at the front moves a significant portion of air around the core engine, providing quieter and more fuel-efficient thrust.
• Gas turbine engine (n): The broader category of engines to which the turbojet belongs, which also includes turboprops and turboshafts.

Synonyms

• Jet engine: A general term for any reaction engine that discharges a fast-moving jet of fluid to generate thrust. "Turbojet engine" is a specific type of jet engine.
• Gas turbine: Highlights the core thermodynamic process shared by this engine type.

Related Phrases

• Turbine section: The part of the turbojet engine containing the turbine that extracts energy from the hot gases to drive the compressor and fan.
• Compressor section: The part of the engine, often containing axial or centrifugal compressors, that pressurizes the incoming air before combustion.

Noun

1. a jet engine in which a fan driven by a turbine provides extra air to the burner and gives extra thrust