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What Is a Jet Engine? Evolution of Jet Engine

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  What Is a Jet Engine? The Brayton Thermodynamic Cycle Broadly speaking, jet engine are internal combustion engines and considered a type of reaction engine, that discharges a fast-moving jet of heated gas that generates thrust by jet propulsion. The term jet engine typically refers to an internal combustion air-breathing jet engine such as a turbojet, turbofan, ramjet, pulse jet, or scramjet. Air-breathing jet engines typically feature a rotating air compressor powered by a turbine, with the leftover power providing thrust through the propelling nozzle.  This process is known as the Brayton thermodynamic cycle. Jet powered aircraft use such engines for long-distance travel. Early jet aircraft used turbojet engines that were relatively inefficient for subsonic flight. Most modern subsonic jet aircraft use high-bypass turbofan engines with higher speed and greater fuel efficiency than piston and propeller aeroengines over long distances. The thrust of a typical jetliner ...