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基于数据驱动的扭转度偏差影响压气机性能的不确定性量化(航空发动机气动热不确定性专栏)

姬田园1,楚武利1,张皓光1,郭正涛1,孟德君2   

  1. 1. 西北工业大学
    2. 中国航发沈阳发动机研究所
  • 收稿日期:2023-12-05 修回日期:2024-01-03 出版日期:2024-01-04 发布日期:2024-01-04
  • 通讯作者: 楚武利
  • 基金资助:
    国家科技重大专项

Data-driven-based approach for uncertainty quantification of twist deviation affecting compressor performance

  • Received:2023-12-05 Revised:2024-01-03 Online:2024-01-04 Published:2024-01-04

摘要: 为研究引入扭转度偏差维数变化以及相关性变化对压气机性能量化结果的影响,以某压气机转子叶片扭转度偏差测量结果为基础,采用基于数据驱动的非嵌入式多项式混沌方法,量化研究了叶片扭转度偏差对单级轴流亚声速压气机气动性能的不确定性影响,并进行了敏感性分析。研究结果表明:各工况点处压气机性能标准差均随着引入扭转度偏差维数的增加而减小。通过量化对比发现,考虑叶顶和叶根两个截面上的扭转度偏差,足以保证压气机性能标准差以及性能概率分布形式的收敛性。而在敏感性分析中发现,引入的扭转度偏差维数越多,可以更准确的判别压气机性能最敏感的扭转度偏差区域。随着各截面上扭转度偏差之间相关性逐渐增强,各工况下压气机性能的波动程度也逐渐增强,压气机性能对各扭转度偏差的一阶敏感性指标的差距也逐渐减小,但压气机性能对各截面上扭转度偏差敏感程度的排序并没有改变。

关键词: 数据驱动, 扭转度偏差, 不确定性量化, 敏感性分析, 压气机

Abstract: To investigate the impact of introducing changes in the dimensionality and correlation of twist deviation on the quantitative results of compressor performance, based on the measurement results of twist deviation of a certain compressor rotor blade, a data-driven non-intrusive polynomial chaos method was used to quantitatively study the uncertainty effect of blade twist deviation on the aerodynamic performance of a single-stage axial subsonic compressor, and sensitivity analy-sis was conducted. The research results indicate that the standard deviation of compressor performance at various oper-ating conditions decreases with the increase of the dimension of twist deviation introduced. Through quantitative compari-son, it was observed that considering twist deviations of the blade tip and root sections is sufficient to ensure the conver-gence of compressor performance standard deviation and performance probability distribution form. However, in sensitiv-ity analysis, it was revealed that the more dimensions of twist deviation introduced, the more accurate the identification of the most twist deviation region in compressor performance can be achieved. As the correlation between twist deviations on various sections gradually strengthens, the fluctuation degree of compressor performance at different operating condi-tions also increases. The difference in the first-order sensitivity indices of compressor performance to twist deviations also gradually decreases, but the ranking of compressor performance sensitivity to twist deviations on various sections remains unchanged.

Key words: data driven, twist deviation, uncertainty quantification, sensitivity analysis, compressor

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