186 Int. J. Exergy, Vol. 21, No. 2, 2016 Copyright © 2016 Inderscience Enterprises Ltd. Examination of performance indicators’ effects based on propulsion parameters in a turboprop engine Enver Yalcin* Faculty of Engineering and Architecture, Department of Mechanical Engineering, University of Balikesir, Balikesir, 10145, Turkey Email: eyalcin@balikesir.edu.tr *Corresponding author M. Ziya Sogut and T. Hikmet Karakoc Faculty of Aeronautics and Astronautics, Department of Airframe and Powerplant Maintenance, Anadolu University, Eskisehir, 26470, Turkey Email: mzsogut@gmail.com Email: hikmetkarakoc@gmail.com Abstract: In this study, propulsion indicators and their effects have been described by reference to the actual data of a turboprop engine. Then, the effects of these indicators on exergetic and environmental performance efficiencies have been investigated considering thermal effects of these indicators. Accordingly, sustainable propulsion index parameters have been developed. Primarily the thrust and impacts of fuel-induced effects on the performance have been evaluated separately. Fuel consumption of a turboprop engine is ranging from 2.97 kg/s to 0.85 kg/s between take-off (160.14 kN) and maximum Mach (31.14 kN) in flight process. The average exergy efficiency was found 17.57%. The exergy efficiency of the turboprop engine highly affected by the exergetic values of the each engine component at various thrust requirements. At the end of the study, the evaluations on sustainable thrust management were made depending on the thrust parameters. Keywords: aircraft engines; propulsion; fuel; thrust; efficiency; exergy. Reference to this paper should be made as follows: Yalcin, E., Ziya Sogut, M. and Hikmet Karakoc, T. (2016) ‘Examination of performance indicators’ effects based on propulsion parameters in a turboprop engine’ effects based on propulsion parameters in a turboprop engine’, Int. J. Exergy, Vol. 21, No. 2, pp.186–201. Biographical notes: Enver Yalcin is working as an Assistant Professor at the Mechanical Engineering Department of University of Balikesir, Turkey. He completed his PhD in 1998, at the same university. His research areas are