2. Contents
Introduction
History of jet engines
Parts of jet engines
Working of jet engines
Types of jet engines
Ramjet
Turbojet
Turbofan
Turboprop
Turboshafts
3. Introduction
Jet engine is a reaction engine discharging a fast moving jet that
generates thrust by jet Propulsion.
Jet engine is a reaction engine discharging a
fast moving jet that generates thrust by jet
propulsion in accordance with Newton’s third
law of motion.
Jet engine moves the airplane forward with a
great force that is produced by a tremendous
thrust and causes the plane to fly very fast.
4. History of jet Engines
The jet engine was built by Egyptian scientists during 150 B.C.
This device was know as Aeolipile.
Dr. Hans von Ohain and Sir Frank Whittle were the main
developers.
5. Parts of jet engines
FAN
COMPRESSOR
COMBUSTOR
TURBINE
MIXER
NOZZLE
6. Working of jet engines
The Engine takes a large volume of air.
The Air is heated, compressed and slowed down.
The Air is forced through many spinning blades.
By mixing this air with jet fuel, the temperature of air reach
up to 3000 degrees. The power of air is used to turn the
turbines.
Finally, when the air leaves, it pushes backward out of the
engine.
This causes the plane to move forward.
8. Ramjet
It is the most simple jet
Engine.
It has no moving parts.
It develops no static thrust.
It requires another aircraft
to assist take off.
Use:- In Guided-missile
systems, space vehicles.
9. Turbojet
Turbojet sucks in air & compress or squeezes it.
All thrust produced by hot, high-speed exhaust gases.
The gases flow through turbine & make it spin.
These gases bounce back & shoot out the rear of the exhaust,
pushing plane forward.
10. Turbofan
A large fan at the front, which sucks in air.
Some portion of air goes into the combustion chamber.
Remaining air :---
Passes through a fan or
Low-pressure compressor
11. Turboprop
It a jet engine attached to a propeller.
Working:-
The turbine at back is turned by the hot gases & this turns a shaft that
drives the propeller
Modern turboprop engines are equipped with propellers that have a smaller
diameter but a larger number of blades for efficient operation
Some small airlines & transport aircraft are powered by turboprops.
12. Turboshafts
It operates much like a turboprop system.
Instead of propeller, it provides power for a helicopter rotor.
The speed of helicopter rotor is independent of speed of gas generator.
This permits the rotor speed to be kept constant even when the speed of
the generator is varied.
13. Uses of jet engines
The industry they’re most prominent in is in the transport industry, where
they are used to propel aircraft, boats and in some one of creations such as a
turbojet powered truck.
The first use of the jet engine was to power military aircraft.
The jet engine is not only used on aircraft but on boats, where water jets
are used to propel the boat forward.
14. Conclusion
The jet engine invention changed the future. With jet engines planes
can carry more cargo, fly faster and can go further than any propeller
plane. Today, the fastest passenger jet flies from london to new York
in 7-8 hours. Planes have made it easier to see new places and
experience
