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Comprehensive exergo- sustainability analysis for a next generation aero engine

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  • Aygun, Hakan
  • Erkara, Seref
  • Turan, Onder

Abstract

In the present study, the exergetic performance behaviours of a variable cycle engine (VCE) which is considered as an alternative engine for the fighter aircraft were analysed for eight flight phases excluding critical fighter phases. In this context, performance analysis of the variable cycle engine model was parametrically performed by on-design relations of an afterburner turbofan. These results were compared with those of conventional military turbofan (CMT) engine. Next, exergetic parameters pertaining to the VCE were measured on component-basis for eight flight phases. Moreover, five exergetic sustainability indexes of the VCE model at all flight phases were investigated in order to observe effects of flight phases on these metrics and these outcomes were compared with the conventional one. According to comparative performance analysis, SFC value of the VCE for cruise phase was estimated as 23.89 g/kN.s whereas that of the CMT engine was computed as 27.25 g/kN.s. On the other hand, the component-based results illustrate that exergy efficiency of the combustor of the VCE has relatively low values ranging from 83.65% to 89.06%, whereas those of high pressure and low pressure turbines have relatively high ratio at concerned flight points. Furthermore, the whole engine-based results show that exergy efficiency of VCE is approximately varies between 7.45% and 31.39% whereas that of the CMT engine changes between 6.31% and 21.5% throughout flight phases. Finally, exergetic sustainability index was calculated the highest at subsonic cruise phases. Namely, it is estimated between 0.45 and 0.6 for the VCE and between 0.31 and 0.34 at these phases for the CMT engine. It is thought that studying exergetic parameters for a military aircraft during the important flight phases could help in understanding which flight segment is useful in terms of sustainability.

Suggested Citation

  • Aygun, Hakan & Erkara, Seref & Turan, Onder, 2022. "Comprehensive exergo- sustainability analysis for a next generation aero engine," Energy, Elsevier, vol. 239(PD).
    • Handle: RePEc:eee:energy:v:239:y:2022:i:pd:s036054422102613x
    DOI: 10.1016/j.energy.2021.122364
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    References listed on IDEAS

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    3. Karabacak, Mustafa & Kirmizi, Mehmet & Aygun, Hakan & Turan, Onder, 2023. "Application of exergetic analysis to inverted Brayton cycle engine at different flight conditions," Energy, Elsevier, vol. 283(C).
    4. Jia, Xingyun & Zhou, Dengji, 2024. "Multi-variable anti-disturbance controller with state-dependent switching law for adaptive cycle engine," Energy, Elsevier, vol. 288(C).
    5. Balli, Ozgur, 2023. "Exergetic, sustainability and environmental assessments of a turboshaft engine used on helicopter," Energy, Elsevier, vol. 276(C).
    6. Cai, Changpeng & Zheng, Qiangang & Wang, Yong & Chen, Haoying & Zhang, Haibo, 2024. "Predictive control method for mode transition process of multi-mode turbine engine based on onboard adaptive composite model," Energy, Elsevier, vol. 302(C).
    7. Laihe Zhuang & Guoqiang Xu & Bensi Dong & Qihang Liu & Mengchen Li & Jie Wen, 2022. "Exergetic Effects of Cooled Cooling Air Technology on the Turbofan Engine during a Typical Mission," Energies, MDPI, vol. 15(14), pages 1-25, July.

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