周向畸变下非轴对称机匣处理扩稳实验研究  

Nonaxisymmetric Casing Treatment for Stall Margin Improvement in an Axial Flow Compressor With Circumferential Distortion

作　　者：赵攀 李益涵 张敏 巴顿 徐晓斌 杜娟[1,2,3] ZHAO Pan;LI Yihan;ZHANG Min;BA Dun;XU Xiaobin;DU Juan(Digital Twin Research Center,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;National Key Laboratory of Science and Technology on Advanced Light-duty Gas-turbine,Beijing 100190,China;School of Aeronautics and Astronautics,University of Chinese Academy of Sciences,Beijing 101408,China;China North Vehicle Research Institute,Beijing 100072,China)

机构地区：[1]中国科学院工程热物理研究所数字孪生研究中心,北京100190 [2]轻型涡轮动力全国重点实验室,北京100190 [3]中国科学院大学航空宇航学院,北京101408 [4]中国北方车辆研究所,北京100072

出　　处：《工程热物理学报》2025年第4期1078-1088,共11页Journal of Engineering Thermophysics

基　　金：国家自然科学基金青年基金(No.52206061);国家重大科技专项(No.2019-Ⅱ-0017-0038)。

摘　　要：本文基于某台低速单转子轴流压气机,在30°扇形总压畸变进气条件下开展施加不同角向位置的非轴对称机匣处理实验。实验结果表明,畸变进气使压气机裕度下降了5.83%。在近失速点,畸变区中心这一位置的叶顶泄漏流非定常波动最强,流场恶化最为严重,因此容易诱发失速先兆产生。对于非轴对称机匣处理,其和畸变区的相对位置关系对裕度增量有重要影响。随着机匣处理的位置变化,裕度增量呈现出先降低后增加,再稍有降低的规律。当机匣处理大幅度覆盖畸变区出口时可产生最大的失速裕度增量,可达5.94%;此时机匣处理可以及时抑制由畸变诱发的能量较小的初始扰动,防止其进一步发展成不能被流动控制手段有效衰减的大尺度失速团从而实现扩稳。对于失速先兆的分析表明,施加非轴对称机匣和全周机匣处理后失速先兆均占据7-8个通道,其有助于为失速预警提供参考。An experiment involving non-axisymmetric casing treatment(NACT)on a low-speed single-rotor axial compressor exposed to total pressure distortion inflow over 30°annular regions was conducted in this paper.Experimental findings indicate a 5.83%decrease in stall margin.At the near-stall point,the self-excited unsteadiness of tip leakage flow gradually intensifies after the rotor rotates into the distortion sector,peaking at the region’s center where the first spike disturbance occurs.The author tested various circumferential locations of NACT on stall margin improvement(SMI).With the position variation in angle,SMI initially decreases,then increases,and finally exhibits a slight decrease.The maximum SMI is 5.94%when NACT widely covers the exit of the distortion region.This study demonstrates that NACT effectively suppresses the initial disturbance with low energy over time,preventing it from evolving into uncontrollable large-scale stall cells.Additionally,the stall inception occupy 7-8 passages with the application of NACT and full annular casing treatment,aiding in providing insights for stall warning.

关 键 词：非轴对称机匣处理 进气畸变 失速裕度 失速先兆 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]