International Journal of Hydrogen Energy, vol.47, no.62, pp.26728-26745, 2022 (SCI-Expanded)
In this study, energy, exergy, environmental and sustainability assessments of jet and hydrogen (H2) fueled J79-GE-17 turbojet engine are done. The results are compared for hydrogen and JP-8 fueled modes. It is found that aviation performance metrics are better for hydrogen utilization mode. By using hydrogen fuel instead of JP-8 fuel; the specific thrust and power rates reduce 1.037%, the specific fuel consumption decreases 63.987% the energy efficiency of the turbojet engine reduces from 30.293% to 29.979%, the exergy efficiency of the combustion chamber component increases 10.581%, and the turbojet engine exergy efficiency rises from 28.54% to 30.73%. The sustainability of the hydrogen fuel utilization for the J79-GE-17 turbojet engine is higher than JP-8 fuel utilization mode. The hydrogen utilization decreases the emission index as 73.36% and the environmental impact as 99.05% comparing to JP-8 usage mode. As a result, hydrogen fuel utilization in this engine is a better choice for emissions and environment, while it can be used as effective as JP-8 fuel.