流体机械2025，Vol.53Issue(1)：41-50,10.DOI:10.3969/j.issn.1005-0329.2025.01.006
扩张间隙分布对压气机性能及流场结构的作用机理研究
Research on the mechanism of the effect of expansion clearance distribution on compressor performance and flow field structure
摘要
Abstract
To investigate the influence of a non-parallel rotor blade tip clearance structure on a compressor,this paper studies the effects of different rotor blade tip clearance values on compressor performance and flow field structure and identifies the optimal clearance value.Based on the design clearance value and the optimal clearance value,three expansion clearance distribution schemes were proposed to analyze their effects on compressor performance and flow field structure.The research results indicate that when the rotor tip clearance is set to 0.5τ,the stability margin improvement of the compressor is relatively large,and the performance of the compressor is superior near the stall point.The flow field structure near the stall point is relatively good,and 0.5τ clearance(P2)is considered the optimal clearance value.If the parallel gap distribution is changed to the expansion gap distribution D1,D2 and D3 schemes,the low-energy fluid vortex near the rotor pressure surface is significantly weakened.For the low-speed zone near the trailing edge of the blades,it is further blown away,improving the flow structure and increasing the stall margin.Compared with the baseline scheme,the D1,D2 and D3 schemes improve the stall margin by 1.6%,1.9%and 2.4%,respectively.The total pressure ratio and efficiency stability margins are improved by 3.18%,8.56%and 6.20%,respectively.The stability margin improvement rate is increased by 0.59%,1.45%and 1.55%,respectively.The results provide insights into optimizing the clearance distribution structure for axial flow compressors.关键词
叶尖间隙分布/轴流压气机/间隙流动控制/压气机性能Key words
tip clearance distribution/axial flow compressor/clearance flow control/compressor performance分类
机械制造引用本文复制引用
吴永惠,张成烽,丁冠东..扩张间隙分布对压气机性能及流场结构的作用机理研究[J].流体机械,2025,53(1):41-50,10.基金项目
翼型、叶栅空气动力学国家重点实验室开放基金项目(614220121050125) （614220121050125）
