Thermodynamic, thermoenvironmental, sustainability and aviation performance analyses of aero turbofan jet engine for dual fueled operations

In this study, thermodynamic, thermoenvironmental, sustainability and aviation performance assessments of jet and biofuel driven aero turbofan jet engine are undertaken. The results are compared for jet and biofuel driven modes. The energy efficiency performance metric is found better for biofuel driven mode. By using biofuel; while the thermal limit ratio increases from 3.72 to 3.73, the fuel heating value ratio, the enthalpy ratio and specific thrust reduce from 144.05 to 124.93, 0.33 to 0.32 and 5.21 to 5.19, respectively. As an aviation performance metric, the specific fuel consumption values are observed almost similar. For the overall engine level exergetic efficiency is measured to be 18.251 % for the jet fuel driven mode, whereas the exergetic efficiency value is found to be 17.941 % for the biofuel driven mode. While some components maintain similar sustainability indexes, certain turbine sections, particularly the High Pressure Turbine Mechanical Shaft (HPTMS), differ significantly between fuel types. The sustainable efficiency factor results reveal that while several components perform similarly, the turbine sections-especially HPT (High Pressure Turbine) and HPTMS-exhibit a considerable shift in sustainable efficiency between Jet Fuel and Biofuel modes. As a result, the biofuel usage in this engine is slightly similar for emissions and environment, while it can be used as effectively as jet fuel.