Aerodynamic rotating instability and fluctuated characteristics of tip clearance flow in low speed axial flow compressor

被引：0
|
作者：
Wang H. [1 ]
Wu Y.-D. [2 ]
Ouyang H. [1 ]
机构：
[1] School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai
[2] School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai
来源：
| 1600年 / Beijing University of Aeronautics and Astronautics (BUAA)卷 / 31期
关键词：
Aerodynamic rotating instability; Fluctuated characteristics of tip clearance flow; Frequency characteristics; Phase-locked average; Unsteady pressure measurements;
D O I：
10.13224/j.cnki.jasp.2016.09.025
中图分类号：
学科分类号：
摘要：
To investigate the relationship between aerodynamic rotating instability and fluctuated characteristics of tip clearance flow, experiment and numerical studies were conducted on a 1.5 stage low speed axial flow compressor. The rotating instability was detected through casing mounted dynamic pressure sensors. The phase-locked and root mean square (RMS) pressure contours showed that the interaction of tip clearance flow with the neighboring blade was the most likely cause of casing flow field fluctuation. From the calculated results of whole-annulus cascade, it is found that the tip clearance vortex structure oscillates periodically at low flow rate conditions. Furthermore, phase lag of pressure fluctuations exist between two neighboring passages, which induces a rotating pressure wave of multiple frequencies. The frequency characteristics of this rotating pressure wave caused by fluctuation of tip clearance flow are coincident with the frequency of rotating instability. This suggests that the fluctuation of tip clearance flow is the major contributor to the initiation of rotating instability. © 2016, Press of Chinese Journal of Aeronautics. All right reserved.
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页码：2239 / 2250
页数：11
相关论文
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