It describe basic concepts about jet propulsion, Thrust & all Components of Turbojet Engine, Working & Complete Study of their Thermodynamics.

1. Study of All Components of
Turbojet Engine, Its Working
& Complete Study of Its
Thermodynamics

2. What Is A Jet Engine?
• A jet engine is a reaction engine
discharging a fast moving jet that
generates thrust by jet propulsion
in accordance with Newton's laws
of motion.
• It is a machine designed for the
purpose of creating large volumes
of high velocity exhaust gases.
• This is done in order to produce
the thrust needed to overcome the
aerodynamic drag of an aeroplane.

3. History Of A Jet Engine
• First jet engine was built by
Egyptian scientists during 100
B.C.
• These devices were known as
Aeolipile.
• Dr. Hans Von Ohain patented a
gas turbine engine on
27th August 1939
• First Turbojet airline began in
1952

4. Introduction
• Jet engine is nothing but a Gas turbine.
• It works under the principle of Newton’s third law
• It states that “For every action there is equal and opposite reaction”.
• Gas turbine operates like toy balloon

5. Parts of A Jet Engine
1. FAN
2. COMPRESSOR
3. COMBUSTOR
4. TURBINE
5. NOZZLE

6. Jet Engine

7. How A Jet Engine Works?
• The basic operation of a jet engine is:-
1. Air enters and is compressed in a compressor
2. Fuel is than added and ignited
3. The resulting gas spins a turbine
4. The turbine powers the compressor
5. The gas than exits the engine at the tail pipe
• The way a jet engine operates is similar to the way an automobile
engine operates i.e intake, compression, ignition, exhaust

9. Types Of Jet Engine
• Ramjet
• Turbojet
• Turbofan
• Turboprop
• Turbo shaft

10. Brayton Cycle
The Fundamental Thermodynamic Cycle On Which Gas Turbine Engines Are Based
Is Called
The Brayton Cycle Or Joule Cycle

11. Jet fuels
• Jet A , Jet A-1 & Jet B are the fuels mostly used in jet engines.
• Jet B is used in very cold climates where the temperature drops upto
-600C
• Jet A-1 & Jet A has the following properties:-
1. Flash point = 380C
2. Auto-Ignition Temperature = 2450C
3. Freezing point A-1 = -470C
4. Freezing point A = -400C
Flast point of a volatile material is the lowest temperature at which it
can vapourize to form an ignitable mixture in air

12. Thanks…..  

13. Jet propulsion
• What is propulsion?
• The word is derived from two Latin words:
pro meaning before or forwards, and
pellere meaning to drive.
• Propulsion means to push forward or drive an object forward.
• A propulsion system is a machine that produces thrust to push an
object forward.