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• Scramjet abstract "A scramjet (supersonic combusting ramjet) is a variant of a ramjet airbreathing jet engine in which combustion takes place in supersonic airflow. As in ramjets, a scramjet relies on high vehicle speed to forcefully compress the incoming air before combustion (hence ramjet), but a ramjet decelerates the air to subsonic velocities before combustion, while airflow in a scramjet is supersonic throughout the entire engine. This allows the scramjet to operate efficiently at extremely high speeds: theoretical projections place the top speed of a scramjet between Mach 12 (8,400 mph; 14,000 km/h) and Mach 24 (16,000 mph; 25,000 km/h).The scramjet is composed of three basic components: a converging inlet, where incoming air is compressed; a combustor, where gaseous fuel is burned with atmospheric oxygen to produce heat; and a diverging nozzle, where the heated air is accelerated to produce thrust. Unlike a typical jet engine, such as a turbojet or turbofan engine, a scramjet does not use rotating, fan-like components to compress the air; rather, the achievable speed of the aircraft moving through the atmosphere causes the air to compress within the inlet. As such, no moving parts are needed in a scramjet. In comparison, typical turbojet engines require inlet fans, multiple stages of rotating compressor fans, and multiple rotating turbine stages, all of which add weight, complexity, and a greater number of failure points to the engine.Due to the nature of their design, scramjet operation is limited to near-hypersonic velocities. As they lack mechanical compressors, scramjets require the high kinetic energy of a hypersonic flow to compress the incoming air to operational conditions. Thus, a scramjet-powered vehicle must be accelerated to the required velocity (usually about Mach 4) by some other means of propulsion, such as turbojet, railgun, or rocket engines. In the flight of the experimental scramjet-powered Boeing X-51A, the test craft was lifted to flight altitude by a Boeing B-52 Stratofortress before being released and accelerated by a detachable rocket to near Mach 4.5. In May 2013, another flight achieved an increased speed of Mach 5.1.While scramjets are conceptually simple, actual implementation is limited by extreme technical challenges. Hypersonic flight within the atmosphere generates immense drag, and temperatures found on the aircraft and within the engine can be much greater than that of the surrounding air. Maintaining combustion in the supersonic flow presents additional challenges, as the fuel must be injected, mixed, ignited, and burned within milliseconds. While scramjet technology has been under development since the 1950s, only very recently have scramjets successfully achieved powered flight.".
• Scramjet thumbnail Scramjet_operation_en.svg?width=300.
• Scramjet wikiPageExternalLink national_hypersonics_plan.html.
• Scramjet wikiPageExternalLink 4832254.stm.
• Scramjet wikiPageExternalLink 4832254.stm.
• Scramjet wikiPageExternalLink australia_jet_dc;_ylt=AjD55nNEoWlZGJ2UcFk9PrHQn6gB.
• Scramjet wikiPageExternalLink aerojet-has-new-mach-7-plus-reusable.html.
• Scramjet wikiPageExternalLink default.htm.
• Scramjet wikiPageExternalLink a-burning-question.
• Scramjet wikiPageExternalLink SCRAMJET%20COMBUSTOR%20DEVELOPMENT.pdf.
• Scramjet wikiPageExternalLink x43-main.html.
• Scramjet wikiPageExternalLink v02.n027.
• Scramjet wikiPageExternalLink us-science-spaceplane-idUSBRE8AR0V220121128.
• Scramjet wikiPageExternalLink hyshot_020816.html.
• Scramjet wikiPageExternalLink scramjet-01a.html.
• Scramjet wikiPageExternalLink index.html?page=19501.
• Scramjet wikiPageID "233500".
• Scramjet wikiPageRevisionID "602478855".
• Scramjet hasPhotoCollection Scramjet.
• Scramjet subject Category:Aircraft_engines.
• Scramjet subject Category:Jet_engines.
• Scramjet subject Category:Non-rocket_spacelaunch.
• Scramjet subject Category:Ramjet_engines.
• Scramjet subject Category:Single-stage-to-orbit.
• Scramjet subject Category:Space_access.
• Scramjet subject Category:Spacecraft_propulsion.
• Scramjet type AircraftEngine102687423.
• Scramjet type AircraftEngines.
• Scramjet type Artifact100021939.
• Scramjet type Device103183080.
• Scramjet type Engine103287733.
• Scramjet type Instrumentality103575240.
• Scramjet type JetEngine103596285.
• Scramjet type JetEngines.
• Scramjet type Machine103699975.
• Scramjet type Motor103789946.
• Scramjet type Object100002684.
• Scramjet type PhysicalEntity100001930.
• Scramjet type Ramjet104051269.
• Scramjet type RamjetEngines.
• Scramjet type Reaction-propulsionEngine104057435.
• Scramjet type Whole100003553.
• Scramjet comment "A scramjet (supersonic combusting ramjet) is a variant of a ramjet airbreathing jet engine in which combustion takes place in supersonic airflow. As in ramjets, a scramjet relies on high vehicle speed to forcefully compress the incoming air before combustion (hence ramjet), but a ramjet decelerates the air to subsonic velocities before combustion, while airflow in a scramjet is supersonic throughout the entire engine.".
• Scramjet label "Motor Scramjet".
• Scramjet label "Scramjet".
• Scramjet label "Scramjet".
• Scramjet label "Scramjet".
• Scramjet label "Scramjet".
• Scramjet label "Scramjet".
• Scramjet label "Superstatoréacteur".
• Scramjet label "Гиперзвуковой прямоточный воздушно-реактивный двигатель".
• Scramjet label "النفاثة الحفص-صدمية".
• Scramjet label "スクラムジェットエンジン".
• Scramjet label "超音速燃烧冲压发动机".
• Scramjet sameAs Scramjet.
• Scramjet sameAs Scramjet.
• Scramjet sameAs Superstatoréacteur.
• Scramjet sameAs Scramjet.
• Scramjet sameAs Scramjet.
• Scramjet sameAs スクラムジェットエンジン.
• Scramjet sameAs 스크램제트.
• Scramjet sameAs Scramjet.
• Scramjet sameAs Scramjet.
• Scramjet sameAs Motor_Scramjet.
• Scramjet sameAs m.01hyml.
• Scramjet sameAs Q60591.
• Scramjet sameAs Q60591.
• Scramjet sameAs Scramjet.
• Scramjet wasDerivedFrom Scramjet?oldid=602478855.
• Scramjet depiction Scramjet_operation_en.svg.
• Scramjet isPrimaryTopicOf Scramjet.