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How Do Gas Turbine Engines Work

786 words - 4 pages

The invention of internal combustion engines in the early 19th century have led to the discovery of utilisation of cheap energy that is petroleum and this enabled the world to develop and progress to the modern world today. Humans were able to accomplish more work done with little manual labour, using internal combustion engines powered by fossil fuels. Internal combustion engine are mechanical power devices that converts heat energy to mechanical work energy with the combustion process taking place in a system boundary (Yunus & Michael, 2011). Among the internal combustion engines invented in the 19th century were the Otto engine, Diesel engine and gas turbine engine. Gas turbine engine is ...view middle of the document...

The volume flow rate of air drawn by the fan is also increased by using a converging nozzle that funnels the air towards the inlet and fan with a laminar flow that has low drag. Walsh and Fletcher (2004) also mentioned that a fan or single-stage fan is normally used in the modern gas turbine engine and more than one fan or multi-stage fans are generally used only in application of high air flow speeds that is usually experience by gas turbine engine for aircraft propulsion application.
Secondly, the air undergoes compression after it entered the inlet of the gas turbine engine. In this process, the drawn air is isentropically compressed by using a rotary compressor. Yunus and Michael (2011) stated that entropy remains unchanged in the isentropic process at which the process is internally reversible and adiabatic. Similar to the fan, the compressor is also powered by the fraction of energy from the turbine during the expansion process through a connecting shaft. This fraction of energy is also known as back work and the ratio between the back work energy and the shaft output energy is known as back work ratio. During the isentropic compression process the volume of the air decreases whereas the pressure and temperature of the air increases. Centrifugal and axial...

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