How Jet Engines Produce Thrust

In: Science

Submitted By Grixon
Words 1759
Pages 8
How Jet Engines Work and Produce Thrust

Table of Contents
1.0 Introduction 3
2.0 Basic Components of a Jet Engine 4
2.2 Compressor 4
2.3 Combustor 5
2.4 Turbine 5
2.5 Exhaust Duct/Nozzle 5
4.0 Creation of Thrust in a Turbojet Engine 7
5.0 Conclusion 9
6.0 References 10

1.0 Introduction

According to Hunecke (1997), jet engines, also known as gas turbine engines, are the most widespread and most efficient method used for airplane propulsion currently. The Jet engine uses basic principles and concepts of motion but applying it using a combination of complex mechanical systems to achieve thrust. There are many types of jet engines; however, this paper will concentrate on the Turbojet Engine to explain the workings of the jet engine to achieve thrust and propulsion.
1.1 How the turbojet Engine Works Turbojet Engines apply Newton’s Third Law of Motion that states, “For every motion there is an equal and opposite reaction” (Hünecke, 1997, p. 4). Simply, when a burnt mixture is ejected backwards from an engine, a forward force is generated on the engine and thus on the aircraft. The bigger the backward force the bigger the forward force (reaction force). Thrust is created when the burnt mixture pushed out the back is ejected at higher velocity than that of the air being sucked in. (Hünecke, 1997, p. 4)
The engine’s fans suck air in at the front. A compressor, made up of fans with many blades and attached to the shaft, elevates the pressure of the air. The compressed air is then sprayed with fuel and an electric spark ignites the mixture. The burning gases expand and blast out through the nozzle, at the back of the engine. As the jets of gas shoot backward, the engine and the aircraft are thrust forward.

2.0 Basic Components of a Jet Engine

2.1 Air Intake/Inlet The air intake acts as a fluid flow duct, which directs the…...

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