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Mini Jet Engine Construction Guide

The document describes the major components and working principle of a mini jet engine. It has five main subassemblies: inlet duct, compressor, combustion chamber, turbine wheel, and exhaust outlet. Air enters the compressor where it is compressed and then moves to the combustion chamber where fuel is added and burned. The hot gases expand and drive the turbine which powers the compressor via a drive shaft. The gases are then expelled through the exhaust nozzle, creating thrust. LPG is used as the fuel due to its ease of use and storage.

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GOWRRAJU ANIL
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330 views3 pages

Mini Jet Engine Construction Guide

The document describes the major components and working principle of a mini jet engine. It has five main subassemblies: inlet duct, compressor, combustion chamber, turbine wheel, and exhaust outlet. Air enters the compressor where it is compressed and then moves to the combustion chamber where fuel is added and burned. The hot gases expand and drive the turbine which powers the compressor via a drive shaft. The gases are then expelled through the exhaust nozzle, creating thrust. LPG is used as the fuel due to its ease of use and storage.

Uploaded by

GOWRRAJU ANIL
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOC, PDF, TXT or read online on Scribd
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MINI JET ENGINE

SYNOPSIS

Before describing the construction of the minijet engine, some basic


Principles should be understood. A minijet engine can be broken down into five
major subassemblies, the inlet duct, compressor, combustion chamber, turbine
wheel, and exhaust outlet. When the engine is running, air is drawn into the
compressor where it is compressed and the pressure is increased. It is then ducted
to the combustion chamber where fuel is added and burned.

INTRODUCTION

The heat in the combustion chamber causes the air to expand before it exits
through a nozzle and drives the power turbine. The turbine drives the compressor
by means of a drive shaft. The remaining hot gasses are expelled out the exhaust
nozzle. Forcing the large amount of air taken into the engine and expelling it out
the exhaust duct at a much higher velocity creates thrust. This is the principle of
operation of the minijet engine. It is a reaction engine.

WORKING PRINCIPLE

We are using LPG as fuel because it is very easy to install and there is no
need for any injection systems or fuel pumps. LPG is stored in a 2 Kg capacity
cylinder. The cylinder is connected to two valves one stop valve and other control
valve that regulate the flow of gas.

The valve is followed by high pressure flexible tubes used in gas welding.
The other end is connected to the fuel nozzle made from mild steel, which is
welded to the combustion chamber.

Advantages

 Power to the weight ratio of a turbojet is about four times that of a


propeller system having reciprocating engine.
 It is simple, easy to maintain and requires lower lubricating oil
consumptions. Further more liquid cooling results in reduced frontal area.
 There is no limit to power output which can be obtained from a turbojet
while the piston engines have reached almost their peak power and
further increased will be at the cost of complexity and greater engine
weight and frontal area of aircraft.
 The speed of turbo jet is not limited by the propeller and it can attain
higher flight speeds than engine propeller aircrafts.
 Simplicity of design, efficient at supersonic speed ~ Mach 2.

Advantages of LPG as fuel

LPG is clean, high octane, abundant and eco-friendly fuel. Higher energy
content, lower CO-2 emission. It can be easily condensed packaged, stored and
utilized.

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