Numerical and experimental study of bleed impact in multistage axial compressors

作     者：Baojie LIU Xinwei ZHUANG Guangfeng AN Xianjun YU Baojie LIU;Xinwei ZHUANG;Guangfeng AN;Xianjun YU

作者机构：Research Institute of Aero-EngineBeihang UniversityBeijing 100191China National Key Laboratory of Science and Technology on Aero-Engine Aero-ThermodynamicsBeijing 100191China School of Energy and Power EngineeringBeihang UniversityBeijing 100191China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2023年第36卷第2期

页      面：1-16页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 

基　　金：the support of the National Natural Science Foundation of China(Nos.51806004,51790511) the National Science and Technology Major Project,China(No.2017-Ⅱ-0001-0013) 

主　　题：Compressor characteristics Inter-stage bleeding Low-speed compressor experiment Multistage axial compressor Spanwise mixing 

摘      要：In this study,the influence of inter-stage bleeding on the compressor performance and inter-stage flow field of a multistage axial compressor is investigated by both experimental and numerical *** experiment is conducted on a four-stage low-speed axial compressor,and a specific computational model is built to simulate the experiment environment *** illuminate the fluid mechanisms of bleeding effect in detail,both the experiment and the simulation are carried out twice,i.e.,in the first time,the mass flow rate upstream the bleed location is constant under different bleed rate conditions;while in the second time,the mass flow rate downstream the bleed location is constant under different bleed rate *** results demonstrate that inter-stage bleeding has little influence on upstream compressor characteristics,and affects the upstream flow field only in the rear half of the *** bleed effect on the downstream flow field is embodied in the variation of an incoming flow profile,an increase as the compressor inlet flow coefficient ***,such an effect is only significant on compressor characteristics at small flow coefficient *** multistage compressors,the variation of compressor characteristics and flow field caused by inter-stage bleeding is the comprehensive result of the bleeding and the variation of the upstream working *** addition,the comparison between numerical and experimental results shows that the flow moves towards top half of span through the downstream rotor passage in the numerical simulation,whereas the trend of flow field variation with different bleed rates at the outlet of the downstream rotor and stator is the same with that at the inlet of the downstream rotor in the experiment,which means that the numerical method has overestimated the radial mixing intensity of the flow.