Solid Mechanics and Vehicle Conceptual Design

Load spectrum correction method considering performance degradation

  • Sisi YUAN ,
  • Xuming NIU ,
  • Zhigang SUN ,
  • Yingdong SONG
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  • 1.College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing  210016,China
    2.Jiangsu Province Key Laboratory of Aerospace Power System,Nanjing  210016,China
    3.Key Laboratory of Aero-Engine Thermal Environment and Structure of Ministry of Industry and Information Technology,Nanjing  210016,China
    4.Wuxi Research Institute,Nanjing University of Aeronautics and Astronautics,Wuxi  213300,China

Received date: 2024-10-08

  Revised date: 2024-11-01

  Accepted date: 2024-11-13

  Online published: 2024-11-18

Abstract

Engine performance degradation often causes changes of performance parameters, which leads to the change of load spectrum in completing the same mission and affects life prediction of the engine structure. At present, the above factors have not been considered in the process of compiling the load spectrum of the whole machine life test, resulting in a large error between life prediction results and field test results. To address this problem, based on the construction of a turbofan engine model that integrates overall performance degradation and dynamic performance correction is constructed, mainly analyzing dynamic correction of engine performance by tip clearance prediction method considering wear and creep. On this basis, a load spectrum correction method for turbofan engine considering performance degradation is proposed. The engine load spectrum for the typical flight mission profile is calculated. The results show that after 3 000 cycles of engine operation, the inlet temperature of the high-pressure turbine corrected with the model proposed in this paper is 0.69% higher than that with the traditional model. Compared with the original spectrum, the corrected load spectrum has a 4.90% reduction in the high-pressure shaft speed at the maximum state, a 2.95% increase in inlet temperature of the high-pressure turbine, and a 21.05% increase in duration of the maximum state. The goal of load spectrum correction considering performance degradation is shown to be achieved.

Cite this article

Sisi YUAN , Xuming NIU , Zhigang SUN , Yingdong SONG . Load spectrum correction method considering performance degradation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2025 , 46(12) : 231312 -231312 . DOI: 10.7527/S1000-6893.2024.31312

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