低速轴流压气机叶尖泄漏涡破碎研究  

Investigation of the Tip Leakage Vortex Breakdown on a Low Speed Large-Scale Axial-Compressor

作　　者：庞健 贺象 马宏伟[2] PANG Jian;HE Xiang;MA Hong-wei(Hunan Key Laboratory of Turbomachinery on Small and Medium Aero-Engine,AECC Hunan Aviation Powerplant Research Institute,Zhuzhou 412002,Hunan,China;National Key Laboratory of Science and Technology on Aero-EnginesAero-thermodynamics,School of Energy and Power Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]中国航发湖南动力机械研究所中小型航空发动机叶轮机械湖南省重点实验室,湖南株洲412002 [2]北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室,北京100191

出　　处：《机械研究与应用》2025年第2期21-24,28,共5页Mechanical Research & Application

摘　　要：该文对低速大尺寸轴流压气机进行了全环定常和非定常的数值模拟,并研究了近失速状态下压气机叶尖泄漏涡破碎、泄漏涡非定常摆动和旋转不稳定性的关联性。研究结果表明:当压气机接近失速点时,转子叶尖出现泄漏涡非定常破碎,易引起叶片前缘压力面和吸力面压差的周期性变化,导致泄漏速度周期发生变化,从而造成泄漏涡周期性的摆动。相邻叶片的泄漏涡非定常摆动的相位并不相同,从周向空间来看,形成具有稳定波数和传播速度的旋转不稳定性。研究结果对认识旋转不稳定性的流动机制具有一定参考意义。A whole annular steady and unsteady numerical simulation is carried out on a low speed large-scale axial-compressor to investigate the relationship between tip leakage vortex breakdown and fluctuation and rotating instability.The results indicate that periodic variation in the pressure difference between the pressure surface and the suction surface of blade tip is induced by the tip leakage vortex unsteady breakdown at the near stall operating condition,resulting in a periodic variation of the leakage speed,which in turn causes the leakage vortex to fluctuate periodically.Observing from the circumferential space,the phase differences,which exist at the adjacent blade,bring out a rotating instability phenomenon with a stable wave number and propagation velocity.It has certain significance for knowing about the flow mechanism of rotating instability.

关 键 词：轴流压气机 全环数值模拟 非定常流动 泄漏涡破碎 旋转不稳定性 

分 类 号：TH45[机械工程—机械制造及自动化]