航空学报2025，Vol.46Issue(12)：190-206,17.DOI:10.7527/S1000-6893.2024.31312
考虑性能退化的载荷谱修正方法
Load spectrum correction method considering performance degradation
摘要
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 maxi-mum state.The goal of load spectrum correction considering performance degradation is shown to be achieved.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Key words
turbofan engine/performance degradation/load spectrum correction/tip clearance/wear/creep分类
航空航天引用本文复制引用
袁思思,牛序铭,孙志刚,宋迎东..考虑性能退化的载荷谱修正方法[J].航空学报,2025,46(12):190-206,17.基金项目
国家科技重大专项(J2019-V-0009-0103) （J2019-V-0009-0103）
国家自然科学基金(52205162) National Science and Technology Major Project(J2019-V-0009-0103) （52205162）
National Natural Science Foundation of China(52205162) （52205162）
