Dronlar ve İnsansız Hava Araçlarında (UAV) Kullanılan Mikro Turbojet Motorunun Genel Havacılık ve Termodinamik Performans Analizi

Yıl 2020, Cilt: 2 Sayı: 2, 115 - 141, 30.08.2020

Özgür Balli

Öz

Farklı çalışma modları (Mode-1,-2,-3,-4) için Dronlar ve UAV’lerde kullanılan bir mikro turbojet motorunun (MTJE) ve motorun alt sistemlerinin genel havacılık, enerji ve ekserji performans analizleri detaylı bir şekilde yapılmıştır. Bu çalışmada kullanılan performans ölçütleri; sistem performans seviyesinin ölçülmesine, sistem ve alt sistemlerinin geliştirilmesine yardımcı olacaktır. Sonuçlar; askeri motorların, özellikle turbojet motorlarının, maksimum çalışma/kalkış modunda en verimli olacak şekilde tasarlanmış olduğundan MTJE’nin en iyi performans değerlerine maksimum çalışma modunda (Mode-4) sahip olduğunu göstermektedir. MTJE motoru Mode-4 çalışma modunda; %18,08 ile maksimum ekserji verimine ve %19,19 ile maksimum enerji verimine sahiptir. Komponentler arasında yanma odası; tüm çalışma modları için en düşük ekserji verimlerine ve sürdürülebilir verim faktörlerine, en yüksek ekserji yıkım akışlarına, ekserji iyileştirme potansiyeli akışlarına, yakıt ekserjisi atık oranlarına ve üretebilirlik kayıp oranlarına sahiptir. Ekserji performans parametreleri dikkate alındığında, açık arayla sistem için kötü faktöryanma odasıdır. Bu nedenle, tüm ekserji performans göstergeleri; sistem sahiplerinin ve araştırmacıların kompresör ve yanma odası komponentlerinin ekserji verim değerlerini iyileştirmek amacıyla bu komponentler üzerinde odaklanmaları gerektiğini göstermektedir.

Anahtar Kelimeler

Micro turbo jet engine, aviation, energy, exergy

General Aviation and Thermodynamic Performance Analyses of a Micro Turbojet Engine Used on Drones and Unmanned Aerial Vehicles (UAV)

Öz

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.

Anahtar Kelimeler

aviation, energy, exergy, micro turbojet engine

Kaynakça

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