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Machine learning based approach for forecasting emission parameters of mixed flow turbofan engine at high power modes

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  • Aygun, Hakan
  • Dursun, Omer Osman
  • Toraman, Suat

Abstract

To predict aircraft emissions from their own features has become more important as the usage field of aviation engines is extended to different sectors for different purposes. In the present study, thanks to by-pass ratio, pressure ratio and rated thrust of the one hundred sixty Mixed-Flow Turbofan (MFT) engines, NOx and CO emission indices as well as fuel flow for take-off and climb-out phases are predicted by using conventional Long-Short Term Memory (LSTM) at initial stage. After that, to improve the obtained estimations, hybrid Convolutional Neural Network (CNN-LSTM) model is employed to these engine dataset. The differences between two methods are presented by several types of error for each parameter. When considering the correlations, the relation between three variables and CO emission index is opposite whereas it is positively for NOx index. Moreover, NOx emission index of the MFT engines is predicted with 0.8166 of R2 by LSTM whereas its R2 increases to 0.8991 by means of hybrid CNN-LSTM approach. Amongst the models, the fuel flow is predicted the highest more than 0.95 of R2 whereas hybrid model makes it predictable with the higher accuracy, which has more than 0.99 of R2 for both phases. Moreover, these enhancements are observed in predicting of the other parameters regarding MFTs. It is thought that the proposed CNN-LSTM model could help in estimation of important parameters of gas turbine engines with higher level of accuracy.

Suggested Citation

  • Aygun, Hakan & Dursun, Omer Osman & Toraman, Suat, 2023. "Machine learning based approach for forecasting emission parameters of mixed flow turbofan engine at high power modes," Energy, Elsevier, vol. 271(C).
    • Handle: RePEc:eee:energy:v:271:y:2023:i:c:s0360544223004206
    DOI: 10.1016/j.energy.2023.127026
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    References listed on IDEAS

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    Cited by:

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    2. Kirmizi, Mehmet & Aygun, Hakan & Turan, Onder, 2024. "Energetic and exergetic metrics of a cargo aircraft turboprop propulsion system by using regression method for dynamic flight," Energy, Elsevier, vol. 296(C).
    3. Kirmizi, Mehmet & Aygun, Hakan & Turan, Onder, 2023. "Performance and energy analysis of turboprop engine for air freighter aircraft with the aid of multiple regression," Energy, Elsevier, vol. 283(C).
    4. Ekici, Selcuk & Ayar, Murat & Orhan, Ilkay & Karakoc, Tahir Hikmet, 2024. "Cruise altitude patterns for minimizing fuel consumption and emission: A detailed analysis of five prominent aircraft," Energy, Elsevier, vol. 295(C).
    5. Ekici, Selcuk & Ayar, Murat & Hikmet Karakoc, T., 2023. "Fuel-saving and emission accounting: An airliner case study for green engine selection," Energy, Elsevier, vol. 282(C).
    6. Chen, Guisheng & Sun, Min & Li, Junda & Wang, Jiguang & Shen, Yinggang & Liang, Daping & Xiao, Renxin, 2024. "Study on high-altitude ceiling strategy of compression ignition aviation piston engines based on BP-NSGA II algorithm optimization," Energy, Elsevier, vol. 294(C).

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