Numerical Study of the Circumferential Fluctuations in Swept Compressor Cascades

2018 2nd International Conference on Advanced Technologies in Design, Mechanical and Aeronautical Engineering

工业技术;机械制造;航空航天工程

Li, Zefeng^1,2 ; Wen, Lei^3 ; Tang, Mingzhi^4 ; Jin, Donghai^1,5 ; Gui, Xingmin^1,5

School of Energy and Power Engineering, Beihang University, Beijing, China^1

Shen Yuan Honors College of Beihang University, Beijing, China^2

Technical Division, Shanghai Electric Gas Turbine Co., Ltd, Shanghai, China^3

AECC Shenyang Engine Research Institute, Shenyang, China^4

Collaborative Innovation Center of Advanced Aero-Engine, Beijing, China^5

关键词: Blade loading;    Compressor cascade;    Dimension reduction method;    In-house codes;    Incidence angles;    Radial migration;    Swept cascade;    Three-dimensional (3D) flow;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/408/1/012013/pdf
DOI  :  10.1088/1757-899X/408/1/012013

来源: IOP

【 摘 要 】

This paper presents comparative numerical studies to analyze the inlet flow and circumferential fluctuation(CF) source terms in compressor cascades. Forward swept cascades with different sweep angles and straight cascade were calculated numerically by a computational fluid dynamics(CFD) package to get the required three-dimensional(3D) flow parameters. A dimension reduction method was introduced and an in-house code for data reduction was conducted to obtain a circumferentially averaged flow field. The results show that different sweep angle and nominal incidence angle will change the magnitude and distribution of the CF source terms at inlet thus altering the inlet flow field. The Mach number(Ma) could also change the inlet CF source terms under the same swept angle. The trends of radial migration and the blade loading would increase with the growing of the inlet Ma.