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Afterburner Report

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Submitted By kiburns
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The Advantages of using Afterburners
Aviation 455
Kelly I. Burns
Liberty University

Abstract
This paper will discuss the history of the afterburner as a means of additional thrust from conception, design, and advances. The afterburner advantages and disadvantages will also be discussed. Sir Isaac Newton’s law states “energy can neither be created or destroyed, only transferred from one form to another.” Afterburners used on jet turbine engines use the energy contained in fuel and the atmosphere more efficiently. Only about 25% of air entering a jet turbine engine is used for combustion. The remaining 75% is used for cooling the extremely hot portions of the engines. The afterburner is designed to harness the energy transferred from combustion into exhaust, and turn it into additional thrust energy for the airplane. Afterburners are extremely fuel inefficient using 50% more fuel consumption in some cases. So afterburners are used sparingly by military and civilian aircraft alike. However, afterburners are also necessary especially for pilots landing or taking off from short runways. The afterburners on jet aircraft use the remaining air that was not used for combustion and ignites it as it leaves the engine. This air is extremely hot and contains a large amount of oxygen. With fuel sprayed into what can be described as basically a ramair jet on the back of the turbofan or turbojet engine and an igniter. The remaining air is burned adding additional thrust power to the engine.

A company called Solar Turbine Inc. because of their experience in fabrication stainless steel parts for aircraft engine was awarded a contract by the US Navy to develop an afterburner for the Westinghouse J34 engine (Leyes, 1999 , p. 78). Solar is credited with being the first US Company to produce a practical afterburner. The drive for afterburner development was spurred by World War

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