来流马赫数波动对扩压叶栅气动性能的影响  

Influence of Inflow Mach Number Fluctuation on the Aerodynamic Performance of Diffusion Cascade

作　　者：马驰[1,2] 高丽敏 李瑞宇[1,2] 吴瑜 MA Chi;GAO Li-Min;LI Rui-Yu;WU Yu(School of Power and Energy,Northwestern Polytechnictil University,Xi'an 710072,China;Collaborative Innovation Center of Advanced Aero-Engine,Beijing 100191,China)

机构地区：[1]西北工业大学动力与能源学院,西安710072 [2]先进航空发动机协同创新中心,北京100083

出　　处：《工程热物理学报》2020年第4期851-859,共9页Journal of Engineering Thermophysics

基　　金：国家自然基金面上项目(No.51790512);高等学校学科创新引智计划(No.B17037)。

摘　　要：准确地掌握来流马赫数的波动(即不确定性)对扩压叶栅的气动性能的影响对于指导压气机设计具有重要意义。采用非嵌入式混沌多项式方法,从统计学的角度评估了随机来流马赫数对扩压叶栅气动性能的影响,并着重对比分析了不同攻角和不同随机来流马赫数工况下来流马赫数的不确定性对扩压叶栅气动性能的整体影响和随之带来的气动性能的波动影响。研究结果表明,来流马赫数的不确定性的确对叶栅气动性能产生影响:来流攻角偏离设计攻角越多,叶栅的气动性能对来流马赫数的不确定性越敏感,且在叶栅通道中反应较敏感区域的范围及位置均随着攻角的变化而变化;随机来流马赫数越高,叶栅的气动性能对来流马赫数的不确定性越敏感。It is vital of importance to accurately understand the influence of fluctuation(e.i.uncertainty)of inflow Mach number on aerodynamic performance of diffusion cascades Non-Intrusive Polynomial Chaos expansion method is introduced here to assess this effect.The overall aerodynamic performance and uncertainty of aerodynamic performance of the cascade caused by different random inflow Mach number in different incidence angles are analyzed in this paper.The results show that uncertainty of inflow Mach number does have an impact on aerodynamic performance of the cascade.The more the incidence angle deviates from the design incidence angle,the more sensitive the aerodynamic performance of the cascade is to uncertainty of inflow Mach number,and the sensitive region in cascade passage is various with the change of incidence angle.Moreover,the higher the random inflow Mach number is,the more sensitive the aerodynamic performance of the cascade is to the uncertainty of the random inflow Mach number.

关 键 词：非嵌入式混沌多项式 不确定性分析 来流马赫数 气动性能 扩压叶栅 

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]