基于圆弧斜缝处理机匣的压气机叶顶泄漏流实验和数值研究

doi:10.16183/j.cnki.jsjtu.2019.040

上海交通大学学报 ›› 2020, Vol. 54 ›› Issue (7): 745-755.doi: 10.16183/j.cnki.jsjtu.2019.040

基于圆弧斜缝处理机匣的压气机叶顶泄漏流实验和数值研究

吴亚东a,b，李涛a，张永杰a

上海交通大学 a. 机械与动力工程学院; b. 燃气轮机与民用航空发动机教育部工程研究中心，上海 200240

出版日期:2020-07-28 发布日期:2020-07-31
通讯作者: 吴亚东（1980-），男，湖北省黄梅县人，副研究员，博士生导师，主要研究方向为叶轮机械非定常流动. 电话(Tel.):021-34204410； E-mail：yadongwu@sjtu.edu.cn.
基金资助:
国家自然科学基金（11202132），上海市自然科学基金(18ZR1418600)，国防基础科研计划(B1420110136)资助项目

Experimental and Numerical Study of Compressor Tip Leakage Flow Based on Arc-Curve Skewed Slot Casing Treatment

WU Yadong a,b,LI Tao a,ZHANG Yongjie a

a. School of Mechanical Engineering; b. Engineering Center of the Ministry of Education for Gas Turbine and Civil Aviation Engines, Shanghai Jiao Tong University, Shanghai 200240, China

Online:2020-07-28 Published:2020-07-31

摘要/Abstract

摘要： 为研究处理机匣对压气机总体性能、叶顶流动非定常性以及旋转不稳定性的影响，基于圆弧斜缝处理机匣对一台单级低速轴流压气机叶顶泄漏流进行被动控制.通过实验对不同工况下的叶顶脉动压力进行频谱分析，并对比机匣处理前后压气机性能以及转子叶顶区域流场特性的变化.结果表明：圆弧斜缝处理机匣能够使压气机获得6.8%的失速裕度提升量，抑制旋转不稳定性现象对应的频谱上的宽频带凸起，推迟泄漏涡的起始位置，进而消除了跨越相邻叶片周向传播的流动现象.斜缝内形成的回流能够抽吸低速流体，减少流道堵塞，改善叶顶的通流能力.

关键词: 轴流压气机, 旋转不稳定性, 处理机匣, 叶顶泄漏流

Abstract: To explore the influence of casing treatment on compressor overall performance, flow unsteadiness, and rotating instability (RI) at blade tip region, arc-curve skewed slot casing treatment is applied to the passive control of the tip clearance flow of a single-stage low-speed axial compressor. The spectrum analysis of blade tip fluctuating pressure under different operating conditions is conducted, and the changes of performance and flow field characteristics at rotor tip region before and after casing treatment are compared. The results show that arc-curve skewed slot casing treatment could increase stall margin by 6.8%, suppress the broadband hump in the frequency spectrum caused by RI, delay the starting position of the leakage vortex, and eliminate the circumferential flow propagation across adjacent blades. The backflow formed in the skewed slot can suck low-velocity fluid, reduce the blockage in the flow passage, and improve the flow capacity near blade tip.

Key words: axial compressor, rotating instability (RI), casing treatment, tip leakage flow

中图分类号:

V 231.3

吴亚东, 李涛, 张永杰. 基于圆弧斜缝处理机匣的压气机叶顶泄漏流实验和数值研究[J]. 上海交通大学学报, 2020, 54(7): 745-755.

WU Yadong, LI Tao, ZHANG Yongjie. Experimental and Numerical Study of Compressor Tip Leakage Flow Based on Arc-Curve Skewed Slot Casing Treatment[J]. Journal of Shanghai Jiaotong University, 2020, 54(7): 745-755.

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基于圆弧斜缝处理机匣的压气机叶顶泄漏流实验和数值研究

Experimental and Numerical Study of Compressor Tip Leakage Flow Based on Arc-Curve Skewed Slot Casing Treatment

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