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Stator re-stagger optimization in multistage axial compressor

Propulsion and Power Research 2021年第2期10卷 107-117页

作者： Jinguang Yang Min Zhang Cheng Peng Michele Ferlauto Yan Liu School of Energy and Power Dalian University of TechnologyDalian116024China Department of Mechanical and Aerospace Engineering Politecnico di TorinoTurin10129Italy

As a widely applied technique in multistage axial compressors,variable stator vanes(VSV)can flexibly rematch the blade rows to fulfil a variety of aerodynamic performance requirements,such as high efficiency and wide surge *** purpose of this paper is to develop an optimization method to quickly determine VSV settings during the preliminary design phase.A mean-line method with a model calibration procedure is adopted to evaluate compressor performance,and the NSGA-II algorithm is employed for automatic *** developed optimization system is then employed to determined re-stagger arrangement in a multistage compressor.A single-speed optimization with performance constraints of specific operating point and a multi-speed optimization with different control laws are *** are compared with available experimental re-stagger scheme,which verifies the effectiveness of the re-stagger optimization ***,method is proposed to determine operating parameters of a working point with a user-defined pressure ratio or mass flow rate after variable geometry.

关键词： multistage axial compressor Mean-line calculation Loss model calibration Variable stator vane Re-stagger optimization

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Numerical and experimental study of bleed impact in multistage axial compressors

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Chinese Journal of Aeronautics 2023年第2期36卷 1-16页

作者： Baojie LIU Xinwei ZHUANG Guangfeng AN Xianjun YU Research Institute of Aero-Engine Beihang UniversityBeijing 100191China National Key Laboratory of Science and Technology on Aero-Engine Aero-Thermodynamics Beijing 100191China School of Energy and Power Engineering Beihang UniversityBeijing 100191China

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.

关键词： compressor characteristics Inter-stage bleeding Low-speed compressor experiment multistage axial compressor Spanwise mixing

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