JET ENGINESJimmy Luo

JET ENGINES

History

How It Works

Current Applications

OVERVIEWHistory

JET ENGINES

HISTORY•Aeolipile invented by Heron of Alexandria (first reaction engine)

•Jet Propulsion took off with the invention of the rocket by the Chinese in the 13th Century

•Heinkel He 178 – first practical jet to fly on 27.08.1939

JET ENGINES

HOW IT WORKS•Newton’s Third Law: For every action (i.e. exhaust gases) there is an equal and opposite reaction (i.e. Thrust).1. Front Fan sucks cold air into the engine2. Secondary fan compresses the air,

increasing pressure 8x3. Liquid fuel is mixed with air and ignited.

(1650 F)4. Exhaust exit through turbine blades, which

turns the compressor and fan.5. Gases exit through exhaust nozzle. (1300

mph)

JET ENGINES

HOW IT WORKS

High-Bypass Turbofan Engine Low-Bypass Turbofan Engine

JET ENGINES

APPLICATIONS•Commercial Jets powered by high-bypass ratio turbofan engines.•Combat Aircraft powered by low-bypass ratio turbofans•Gas turbine engines in helicopters, powerplants, M1-Abram Tank

JET ENGINES

APPLICATIONS

•Lockheed Martin F-35 Lightning II, derivative of the X-35 from the Joint Strike Fighter (JSF) Program

JET ENGINES

APPLICATIONS

Above: F-35B (STOVL) Engine

Below: GE/RR F136 Engine

JET ENGINES

REFERENCES•http://en.wikipedia.org/wiki/F-35_Lightning_II•http://en.wikipedia.org/wiki/Turbofan•http://en.wikipedia.org/wiki/Jet_engine•http://www.jpl.nasa.gov/