Landing and take-off (LTO) flight phase performances of various piston-prop aviation engines in terms of energy, exergy, irreversibility, aviation, sustainability and environmental viewpoints

Abstract

In this study, four piston-prop aero engines whose power rates are 180, 260, 300, and 325 Hps operating at the approach, take-off, taxi, and climb-out phases namely the LTO phases are assessed with the energy, exergy, irreversibility, aviation, sustainability, and environmental analyses. The analyses are conducted separately for each engine and each phase of LTO. As per the main findings, the Engine 2 (260 Hp) is the highest energy efficient engine via 26.55% in approach phase, while the Engine 3 (300 Hp) is the best in take-off phase via 27.68%. Also, the Engine 1 (180 Hp) has the best energy efficiency performances both in the taxi and climb-out phase with values of 22.67% and 25.19%, respectively. Also, the Engine 2 turned out to be the most exergy efficient engine for all phases of LTO. When the Engine 2 operates in approach phase, it is reached highest exergy efficiency value with 24.75%. The lowest exergy efficiency value is obtained as 10.18% for which the Engine 4 (325 Hp) at the taxi phase. The Engine 4 is the most irreversible engine for all LTO phases. Besides, in the take-off phase, the total irreversibility rate of the four engines is 1624.47 kW. Whilst the maximum environmental and ecological effect factors are observed from Engine 4 with a value of 8.828 and 9.828 at the taxi phase of LTO, it's exergetic sustainability index and sustainable efficiency factor are observed at the take-off phase via 0.232 and 1.232, respectively. This study and its detailed results will be helpful for the piston-prop type of aero engine users, owners, designers, researchers and industrialists.