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Performance optimization for an advanced geared turbofan engine integrated with cooled cooling air heat exchangers

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  • Yang, Xuesen
  • Zhao, Wei
  • Zhao, Qingjun
  • Xiang, Xiaorong
  • Hu, Bin
  • Luo, Weiwei

Abstract

This paper presents a coupling model designed to evaluate the impact of using fuel as a heat sink to improve turbine thermal management on overall engine performance. Additionally, a single-objective optimization model is developed, with specific fuel consumption as the objective function, to determine the optimal geometrical parameters of a cooled cooling air heat exchanger (CCAHX). A comparative study was conducted to evaluate the benefits of using a mini-tube heat exchanger for cooling the bleed air, specifically targeting the high-pressure turbine rotor blades. The findings demonstrate that integrating a CCAHX positively impacts engine performance. Compared to the original model without a CCAHX, specific fuel consumption decreases by 0.064 %, while thermal efficiency and overall pressure ratio improve by 0.366 % and 0.568 %, respectively. The effects of CCAHX design parameters on engine performance were examined using a second-order response surface method. The optimization results reveal simultaneous improvements in specific fuel consumption, overall pressure ratio, and thermal efficiency, while maintaining the same fan corrected speed and thrust. Additionally, the decrease in turbine inlet temperature reduces the thermal load on the turbines.

Suggested Citation

  • Yang, Xuesen & Zhao, Wei & Zhao, Qingjun & Xiang, Xiaorong & Hu, Bin & Luo, Weiwei, 2024. "Performance optimization for an advanced geared turbofan engine integrated with cooled cooling air heat exchangers," Energy, Elsevier, vol. 308(C).
    • Handle: RePEc:eee:energy:v:308:y:2024:i:c:s0360544224024927
    DOI: 10.1016/j.energy.2024.132718
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    References listed on IDEAS

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