NPU⁃LL叶片系列构型气动性能研究

Aerodynamic Performance Study on NPU⁃LL Blade Series Configuration

为提高轴流压气机气动负荷和稳定性,本文将若干个叶片的前缘和后缘在不同轴向位置上沿圆周方向彼此交错排列,构成压气机的一个非均匀叶片排。提出了4种压气机叶片新型排布构型———NPU⁃刘⁃廖叶片系列构型,简称LL叶片系列构型,分析了NPU⁃LL叶片系列构型的结构特征和参数,探索了其流动特性,初步揭示了NPU⁃LL叶片系列构型在流动控制方面的突出优势,计算了4种NPU⁃LL叶片叶栅布局的气动特性,并与常规叶栅进行了对比。研究结果表明,NPU⁃LL叶片系列构型打破了传统叶片均匀布局局限,可有效地提升压气机的气动性能,为压气机性能的优化设计提供了一种新思路。

In order to improve the aerodynamic load and stability of the axial compressor,the leading and trailing edges of several blades are arranged staggered with each other in the circumferential direction at different axial positions to form a non⁃uniform blade row of the compressor.This paper proposes four new configurations of compressor blades,which is uniformly defined as the NPU⁃Liu⁃Liao blade series configuration(Abbreviation:LL Blade).This paper introduces the structural characteristics and parameters of NPU⁃LL blade series configuration,explores its flow characteristics,and preliminarily reveals the prominent advantages of NPU⁃LL blade series configuration in flow control.The aerodynamic characteristics of four NPU⁃LL blade cascade layouts are calculated and compared with the conventional cascade.The results show that the configuration of NPU⁃LL blade series breaks the limitation of traditional blade uniform layout,which can effectively improve the aerodynamic performance of compressor and provide a new idea for the optimization design of compressor performance.