加工误差对超声速叶栅气动性能影响的不确定性分析  

Uncertainty analysis of effects of manufacturing errors on aerodynamic performance of supersonic cascades

作　　者：刘铠烨 楚武利[1] 郭正涛 梁彩云 孟德君 LIU Kaiye;CHU Wuli;GUO Zhengtao;LIANG Caiyun;MENG Dejun(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,China;Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China)

机构地区：[1]西北工业大学动力与能源学院,西安710129 [2]中国航发沈阳发动机研究所,沈阳110015

出　　处：《航空动力学报》2024年第12期108-120,共13页Journal of Aerospace Power

基　　金：国家科技重大专项(J2019-Ⅰ-0011)。

摘　　要：为了研究法向加工误差对超声速叶栅气动性能的影响,基于高斯过程和主成分分析法,构建了由法向加工误差导致的叶表五维几何不确定性模型。采用基于高斯分布型的非嵌入式混沌多项式方法,结合稀疏网格技术,构建了叶栅性能的代理模型,并预测了加工误差对超声速叶栅气动性能的影响。研究中,还提出了一种量化叶栅流场各部分损失的损失源模型。结果表明:在随机加工误差影响下,超声速叶栅总压损失系数近似于正态分布。总压损失系数对前缘部分的加工误差最为敏感,对吸力面加工误差的敏感程度高于压力面加工误差,并且敏感性沿弦向位置向后逐渐递减。影响机理是,前缘加工误差会影响弓形激波强度以及前缘加速过程,从而影响槽道激波结并构造成叶栅损失出现较大偏差。To study the effects of normal manufacturing error on the aerodynamic performance of supersonic cascade,a model of five-dimensional blade surface geometric variability from normal manufacturing errors was constructed based on Gaussian process and principal component analysis.Combined with the non-intrusive polynomial chaos expansion based on Gaussian distribution and the sparse grid technique,a surrogate mode of cascade performance was proposed.Then,the effects of manufacturing error on the aerodynamic performance of supersonic cascade were predicted by the surrogate model.A loss source model was also proposed to quantify the loss of each part of cascade flow field.The results showed that the total pressure loss coefficient of supersonic cascade was approximately normal distribution under the effects of random manufacturing error.The total pressure loss coefficient was most sensitive to the manufacturing error of the leading edge,and more sensitive to the manufacturing error of the suction surface than to the manufacturing error of the pressure surface,and the sensitivity gradually decreased backward along the chord.According to the mechanism,the leading edge manufacturing error may affect the bow shock wave strength and the leading edge acceleration process,thus affecting the passage shock pattern and forming a cascade loss with a large deviation.

关 键 词：超声速叶栅 法向加工误差 非嵌入式混沌多项式 不确定性量化分析 气动性能 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]