航空学报 > 2025, Vol. 46 Issue (12): 231312-231312   doi: 10.7527/S1000-6893.2024.31312

固体力学与飞行器总体设计

考虑性能退化的载荷谱修正方法

袁思思1, 牛序铭1,2,3,4, 孙志刚1,2,3,4(), 宋迎东1,2,3   

  1. 1.南京航空航天大学 能源与动力学院,南京 210016
    2.江苏省航空动力系统重点试验室,南京 210016
    3.航空发动机热环境与热结构工业和信息化部重点试验室,南京 210016
    4.南京航空航天大学 无锡研究院,无锡 213300
  • 收稿日期:2024-10-08 修回日期:2024-11-01 接受日期:2024-11-13 出版日期:2024-11-22 发布日期:2024-11-18
  • 通讯作者: 孙志刚 E-mail:szg_mail@nuaa.edu.cn
  • 基金资助:
    国家科技重大专项(J2019-V-0009-0103);国家自然科学基金(52205162)

Load spectrum correction method considering performance degradation

Sisi YUAN1, Xuming NIU1,2,3,4, Zhigang SUN1,2,3,4(), Yingdong SONG1,2,3   

  1. 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:2024-10-08 Revised:2024-11-01 Accepted:2024-11-13 Online:2024-11-22 Published:2024-11-18
  • Contact: Zhigang SUN E-mail:szg_mail@nuaa.edu.cn

摘要:

发动机性能退化往往引起性能参数发生改变,进而导致完成相同飞行任务时载荷谱发生变化,对发动机结构寿命预测造成影响。目前,整机寿命试车载荷谱编制过程中尚未考虑性能退化因素影响,导致寿命试车结果与外场存在较大误差。针对这一问题,构建了综合整机性能退化与动态性能修正的涡扇发动机模型,重点研究了考虑磨损、蠕变的叶尖间隙预测方法对发动机性能的动态修正,提出了一种考虑性能退化的涡扇发动机载荷谱修正方法。同时对典型飞行任务剖面下的载荷谱进行了计算,结果表明:发动机在运行3 000循环后,动态性能修正模型的高压涡轮进口温度较传统模型升高0.69%;修正后的载荷谱与原谱相比,其最大状态的高压轴转速降低4.90%、高压涡轮进口温度上升2.95%,最大状态持续时间增加21.05%,实现了考虑性能退化的载荷谱修正目标。

关键词: 涡扇发动机, 性能退化, 载荷谱修正, 叶尖间隙, 磨损, 蠕变

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.

Key words: turbofan engine, performance degradation, load spectrum correction, tip clearance, wear, creep

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