Exergetic analysis of an aircraft turbojet engine with an afterburner
2013; Vinča Institute of Nuclear Sciences; Volume: 17; Issue: 4 Linguagem: Inglês
10.2298/tsci110911043e
ISSN2334-7163
AutoresM.A. Ehyaei, A. Anjiridezfuli, Marc A. Rosen,
Tópico(s)Advanced Aircraft Design and Technologies
ResumoAn exergy analysis is reported of a J85-GE-21 turbojet engine and its components for two altitudes: sea level and 11,000 meters. The turbojet engine with afterburning operates on the Brayton cycle and includes six main parts: diffuser, compressor, combustion chamber, turbine, afterburner and nozzle. Aircraft data are utilized in the analysis with simulation data. The highest component exergy efficiency at sea level is observed to be for the compressor, at 96.7%, followed by the nozzle and turbine with exergy efficiencies of 93.7 and 92.3%, respectively. At both considered heights, reducing of engine intake air speed leads to a reduction in the exergy efficiencies of all engine components and overall engine. The exergy efficiency of the turbojet engine is found to decrease by 0.45% for every 1?C increase in inlet air temperature.
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