@article{article_726860, title={General Aviation and Thermodynamic Performance Analyses of a Micro Turbojet Engine Used on Drones and Unmanned Aerial Vehicles (UAV)}, journal={Journal of Aviation Research}, volume={2}, pages={115–141}, year={2020}, author={Balli, Özgür}, keywords={aviation, energy, exergy, micro turbojet engine}, abstract={<p>The general aviation, energetic and exergetic performance analyses of a micro turbojet engine (MTJE) used on drones and UAVs and its major subcomponents are made for different operation modes (Mode-1,-2,-3,-4) in detail. Used performance metrics in this study help to measure the system performance level and to develop the system and its subsystems. The results indicate that the MTJE has the best performance values at the maximum operation modes (Mode-4) because the military engines, especially turbojet engine, are designed to be the most efficient in the maximum operation/take-off modes. The MTJE has the maximum energy efficiency via 19.190% at Mode-4 when it has the maximum exergy efficiency by 18.079% at Mode- 4, respectively. Between the components, the combustion chamber has the lowest exergy efficiency values, the lowest sustainable efficiency factors, the highest exergy destruction rates, the highest exergetic improvement potential rates, the highest fuel exergy waste ratios and the highest productivity lack ratios for all operation modes. When the exergetic performance parameters are taken into consideration, the bad factor for the system is the combustion chamber by far. Therefore, all exergetic performance indicators show that the system owners and researchers focus on the components of the compressor and combustion chamber to improve the exergetic efficiency values of these components. <br /> </p>}, number={2}, publisher={İnan ERYILMAZ}