// ORBITAL LOGISTICS AND PROPULSION TERM

Inlet

The opening at the front of a jet engine or air-breathing engine that captures incoming air and directs it into the compressor.

TECHNICAL DEFINITION

The component of an air-breathing propulsion system (e.g., jet engine, ramjet) responsible for efficiently capturing and decelerating incoming free-stream air, converting its kinetic energy into pressure energy before it enters the compressor or combustion chamber.

BACKGROUND

SpaceWorks Enterprises, Inc. (SEI) is an aerospace engineering company based in Atlanta, Georgia, United States that specializes in the design, assessment, hardware prototyping and flight demonstration of advanced space concepts for both government and commercial customers.  

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SYNONYMS & ALIASES

  • Air Intake
  • Intake Duct
  • Diffuser
  • Ram Air Inlet

USAGE NOTE

The design of the inlet is critical for engine performance, especially at high speeds, to prevent shockwaves and flow separation.

DEVELOPERS

Organizations developing technology related to Inlet.

  • GE Aerospace

    Designs and manufactures a wide range of jet engines, where inlet design is critical for optimal engine performance across various flight regimes from subsonic to supersonic. Their work includes advanced computational fluid dynamics and experimental testing of inlet systems.

  • Pratt & Whitney

    A global leader in aerospace propulsion systems, developing advanced inlets as integral components of their jet engines for commercial and military aircraft, focusing on efficiency, noise reduction, and performance.

  • Rolls-Royce

    Known for its sophisticated aerospace engines, incorporating advanced inlet technologies to manage airflow efficiently, minimize drag, and optimize engine thrust for a variety of platforms.

  • NASA (National Aeronautics and Space Administration)

    Conducts extensive research and development in aeronautics and space propulsion, including fundamental studies and experimental testing of advanced inlet designs for high-speed, hypersonic aircraft, and next-generation propulsion systems.

  • Reaction Engines Ltd.

    Developing the Synergetic Air-Breathing Rocket Engine (SABRE), which features a unique and highly advanced inlet system designed to operate efficiently across an unprecedented range of speeds from standstill to Mach 5.5, before transitioning to rocket mode.

  • Lockheed Martin

    A major aerospace and defense company involved in the development of advanced aircraft and hypersonic vehicles, where sophisticated inlet design is crucial for performance, stealth characteristics, and efficient airbreathing propulsion.

  • Boeing

    As a leading global aerospace company, Boeing integrates complex propulsion systems into its aircraft, requiring deep understanding and input into the design, performance, and integration of engine inlets to ensure optimal aerodynamic and engine efficiency.

  • Northrop Grumman

    Develops advanced aerospace systems, including high-performance aircraft and hypersonic platforms, where innovative inlet solutions are essential for achieving mission objectives, especially in high-speed and challenging flight environments.

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