Abstract
In this chapter, the application of energy and exergy analyses to aircraft is described. The extension of exergy analyses from ground-based systems to the aerospace engine differs from the traditional analysis of terrestrial systems. The operating environment varies significantly during the operation of aerospace engines during a flight. The effect of different reference-environment models on the exergy efficiencies of a turbojet engine during a flight is assessed here. Continually varying and constant reference environments are considered. It is observed that exergy analysis can help provide this information, as it is a useful tool for design, analysis, and performance improvement of aircraft power plants and flight systems.
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