// ORBITAL LOGISTICS AND PROPULSION TERM

Oxidizer

An oxidizer is a chemical that provides oxygen for a fuel to burn, similar to how air helps a fire burn. In rockets, it's stored separately from the fuel and mixed in the engine.

Oxidizer — illustration from Wikipedia
Image via Wikipedia

TECHNICAL DEFINITION

An oxidizer is a chemical compound that supplies oxygen or other electron-accepting species to a fuel during combustion, enabling the release of chemical energy in rocket engines, typically stored separately from the fuel.

BACKGROUND

The RS-25, also known as the Space Shuttle Main Engine (SSME), is a liquid-fuel cryogenic rocket engine that was used on NASA's Space Shuttle and is used on the Space Launch System.

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SYNONYMS & ALIASES

  • oxidizer agent
  • oxidant
  • oxygen source
  • electron acceptor

USAGE NOTE

Liquid oxygen (LOX) is a common oxidizer used with various fuels in cryogenic rocket engines.

DEVELOPERS

Organizations developing technology related to Oxidizer.

  • SpaceX

    Develops and utilizes sub-cooled liquid oxygen (LOX), also known as densified LOX, as the oxidizer for its Falcon and Starship rockets to increase propellant density and improve engine performance.

  • NASA

    Conducts extensive research on advanced rocket propellants through centers like the Glenn Research Center and Marshall Space Flight Center, focusing on technologies such as cryogenic fluid management, oxidizer densification, and developing 'green' oxidizers to replace hypergolic substances.

  • Aerojet Rocketdyne

    An L3Harris Technologies company that manufactures rocket propulsion systems. They have a long history of developing engines that use a wide range of oxidizers, including liquid oxygen, dinitrogen tetroxide, and mixed oxides of nitrogen for space launch and defense applications.

  • Air Force Research Laboratory (AFRL)

    The U.S. Air Force's primary scientific research and development center. Its Rocket Propulsion Division is heavily involved in researching advanced propellants, including novel high-performance and storable oxidizers for next-generation space and missile systems.

  • Air Products and Chemicals, Inc.

    A major global supplier of industrial gases, including liquid oxygen and liquid hydrogen, to the aerospace industry. The company develops advanced technologies for the production, purification, storage, and high-volume transfer of cryogenic oxidizers for launch vehicle fueling.

  • Linde plc

    A global industrial gas and engineering company that is a key supplier of liquid oxygen and other cryogenic propellants to space launch providers. Linde invests in technology for the large-scale production, transport, and on-site management of oxidizers at spaceports.

  • Blue Origin

    Develops launch vehicles and engines, such as the BE-4, which use liquid oxygen (LOX) as the oxidizer. Their work involves advanced cryogenic fluid management systems for handling LOX efficiently on reusable rockets like New Glenn.

  • Ursa Major Technologies

    Designs and manufactures liquid rocket engines for the satellite launch and hypersonic sectors. The company develops engines that primarily utilize liquid oxygen as an oxidizer, focusing on improving the performance and manufacturability of propulsion systems.

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