Study on the relationship between radial flow and rotating instability characteristics under different axial clearances
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Hefei Li
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Bin Jiang
Abstract
This study investigates the impact of axial gap variation on throughflow characteristics and rotating instability (RI) in axial-flow compressors, focusing on the relationship between radial secondary flow (RSF) and RI behavior. Full-annulus simulations of a 1.5-stage compressor are analyzed using proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) to extract dominant flow modes. Results show that higher-order modes in the tip region are dominated by frequencies linked to RI and leakage vortex/RSF interactions. The eigenfrequencies are governed by circumferential mode structures and propagation velocities. RSF exhibits consistent modal and frequency characteristics across radial positions. Increasing the axial gap reduces RSF energy and RI frequency energy, corresponding to weaker radial flow intensity and RI perturbations. DMD analysis confirms a positive correlation between RSF frequency and RI energy, highlighting the coupling mechanism. These findings provide new insight into the flow dynamics governing RI and offer guidance for compressor stability improvement.
Acknowledgments
This work was financially supported by National Natural Science Foundation of China joint fund for regional innovation and development U20A20298.
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Research ethics: Not applicable.
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Informed consent: Not applicable.
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Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission. The research output comes from joint efforts.
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Use of Large Language Models, AI and Machine Learning Tools: None declared.
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Conflict of interest: The author declared that they have no conflicts of interest to this work.
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Research funding: National Natural Science Foundation of China joint fund for regional innovation and development U20A20298.
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Data availability: Not applicable.
References
1. Xu, Q, Wu, J, Wu, L, Yang, H, Wang, Z, Wei, Y. Pressure and velocity fluctuations characteristics of the tip clearance flow in an axial compressor stage at the near-stall condition. Aero Sci Technol 2022;129:107796. https://doi.org/10.1016/j.ast.2022.107796.Search in Google Scholar
2. Ming, Z, Xu, D, Jia, L, Sun, D, Sun, X. Effect of differential tip clearance on the performance and noise of an axial compressor. Aero Sci Technol 2023;132:108070. https://doi.org/10.1016/j.ast.2022.108070.Search in Google Scholar
3. Cheng, H, Lu, X, Zhao, S, Huang, S, Zhu, J. Effect of tip clearance variation in the transonic axial compressor of a miniature gas turbine at different Reynolds numbers. Aero Sci Technol 2022;128:107793. https://doi.org/10.1016/j.ast.2022.107793.Search in Google Scholar
4. Brand, M, Kottapalli, A, Spakovszky, Z. (2011). The dependence of spike-type stall inception on blade-tip leakage flow in axial compressors. 16.62X Final Report, Experimental Projects Course, Department of Aeronautics and Astronautics, MIT.Search in Google Scholar
5. Hewkin-Smith, M, Pullan, G, Grimshaw, SD. The role of tip leakage flow in spike-type rotating stall inception. In: Asme Turbo Expo 2017: Turbomachinery Technical Conference & Exposition; 2017, Vol 2D: Turbomachinery, GT2017-63655.10.1115/GT2017-63655Search in Google Scholar
6. Kim, S, Pullan, G, Hall, CA, Grewe, RP, Wilson, MJ, Gunn, E. Stall inception in low pressure ration fans. In: ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition; 2018, Vol 2A: Turbomachinery, GT2018-75153.10.1115/GT2018-75153Search in Google Scholar
7. Yamada, K, Kikuta, H, Furukawa, M, Gunjishima, S, Hara, Y. Effects of tip clearance on the stall inception process in an axial compressor rotor. In: ASME Turbo Expo 2013: Turbine Technical Conference and Exposition; 2013, Vol 6C: Turbomachinery, GT2013-95479.10.1115/GT2013-95479Search in Google Scholar
8. Danish, SN, Qureshi, S, Imran, MM, Khan, SUD, Sarfraz, MM, El-Leathy, A, et al.. Effect of tip clearance and rotor–stator axial gap on the efficiency of a multistage compressor. Appl Therm Eng 2016;99:988–95. https://doi.org/10.1016/j.applthermaleng.2016.01.132.Search in Google Scholar
9. Gorrell, SE, Okiishi, TH, Copenhaver, WW. Stator-rotor interactions in a transonic compressor part I: effect of blade-row spacing on performance. ASME J Turbomach 2003;125:328–35. https://doi.org/10.1115/1.1540119.Search in Google Scholar
10. Liu, D, Li, J, Jiang, A, Zhou, Y. Influence of axial gap on compressor passage blockage and aerodynamic performance. Acta Aeronaut Astronaut Sin 2015;36:3522–33.Search in Google Scholar
11. Dong-jian, L, Jun, L, Jian-wei, L, Zhi-huang, L, Fan-yu, L. Dynamics mechanism of tip leakage flow trajectory movement in rotor. J Aero Power 2014;29:1680–7.Search in Google Scholar
12. Shi, YF, Wu, H, Xu, QN, Song, SP. Effect of stator-rotor blade row axial spacing on transonic axial compressor performance. J Aero Power 2012;27:946–52.Search in Google Scholar
13. Gan, J, Im, H, Zha, G. Simulation of stall inception of a high speed axial compressor with rotor-stator interaction. In: 51st AIAA/SAE/ASEE Joint Propulsion Conference; 2015, Session: Compressors II, AIAA 2015-3932.10.2514/6.2015-3932Search in Google Scholar
14. Inoue, M, Kuroumaru, M, Yoshida, S, Furukawa, M. Short and long-length scale disturbances leading to rotating stall in an axial compressor stage with different stator/rotor gaps. ASME J Turbomach 2002;124:376–84. https://doi.org/10.1115/1.1458022.Search in Google Scholar
15. Yuan, W. Study on the influence mechanism of axial gap on stall inception in a two-stage axial-flow fan [Master]. North China Electric Power University; 2016.Search in Google Scholar
16. Kameier, F, Neise, W. Rotating blade flow instability as a source of noise in axial turbomachines. J Sound Vib 1997;203:833–53. https://doi.org/10.1006/jsvi.1997.0902.Search in Google Scholar
17. Mathioudakis, K, Breugelmans, FAE. Development of small rotating stall in a single stage axial compressor. In: ASME 1985 International Gas Turbine Conference and Exhibit; 1985, Vol 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, 85-GT-0227.10.1115/85-GT-227Search in Google Scholar
18. Mailach, R, Lehmann, I, Vogeler, K. Rotating instabilities in an axial compressor originating from the fluctuating blade tip vortex. J Turbomach 2001;123:453–60. https://doi.org/10.1115/1.1370160.Search in Google Scholar
19. Mailach, R, Sauer, H, Vogeler, K. The periodical interaction of the tip clearance flow in the blade rows of axial compressors. In: ASME Turbo Expo 2001: Power for Land, Sea, and Air; 2001, Vol 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, 2001-GT-0299.10.1115/2001-GT-0299Search in Google Scholar
20. März, J, Hah, C, Neise, W. An experimental and numerical investigation into the mechanisms of rotating instability. J Turbomach 2002;124:367–74. https://doi.org/10.1115/1.1460915.Search in Google Scholar
21. Hah, C, Bergner, J, Schiffer, HP. Tip clearance vortex oscillation, cortex shedding and rotating instability in an axial transonic compressor rotor. In: ASME Turbo Expo 2008: Power for Land, Sea, and Air; 2008, Vol 6: Turbomachinery, Parts A, B, and C. GT2008-50105.10.1115/GT2008-50105Search in Google Scholar
22. Hah, C, Voges, M, Mueller, MW, Schiffer, H-P. Characteristic of tip clearance flow instability in a transonic compressor. In: ASME Turbo Expo 2010: Power for Land, Sea, and Air; 2010, Vol 7: Turbomachinery, Parts A, B, and C, GT2010-22101.10.1115/GT2010-22101Search in Google Scholar
23. Zhang, H, Deng, X, Chen, J, Huang, W. Unsteady tip clearance flow in an isolated axial compressor rotor. J Therm Sci 2005;14:211–19. https://doi.org/10.1007/s11630-005-0004-4.Search in Google Scholar
24. Wang, H, Wu, Y, Wang, Y, Deng, S. Evolution of the flow instabilities in an axial compressor rotor with large tip clearance: an experimental and URANS study. Aero Sci Technol 2020;96:105557. https://doi.org/10.1016/j.ast.2019.105557.Search in Google Scholar
25. Lumley, J. The structure of inhomogeneous turbulent flows. In: Atmospheric turbulence and radio wave propagation. Moscow: Nauka; 1967:166–76 pp.Search in Google Scholar
26. Liu, Z. Stall mechanism study and stall process modal analysis for a transonic axial compressor. J Chin Soc Power Eng 2020;40:23–30.Search in Google Scholar
27. Chen, C, Song, P, Feng, T, Li, Y, Liao, Y, Wang, C. Analysis of unsteady flow in compressor Cascade based on modal POD methods. J. Phys.: Conf. Ser. 2021;2030:012068. https://doi.org/10.1088/1742-6596/2030/1/012068.Search in Google Scholar
28. Wang, Y, Yue, L, Chen, J. Analysis of the unsteady flow in compressor Cascade with POD method. In: ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition; 2016, Vol 2D: Turbomachinery, GT2016-57638.Search in Google Scholar
29. Spencer, RA, Gorrell, SE, Jones, M, Duque, E. Analysis and comparison of inlet distortion flow physics at design and near stall operating condition using proper orthogonal decomposition. In: 52nd AIAA/SAE/ ASEE joint propulsion conference; 2016, Session: Gas Turbine Inlets, AIAA 2016-5058.10.2514/6.2016-5058Search in Google Scholar
30. Guan, D, Sun, D, Xu, R, Bishop, D, Sun, X, Ni, S, et al.. Experimental investigation on axial compressor stall phenomena using aeroacoustics measurements via empirical mode and proper orthogonal decomposition methods. Aero Sci Technol 2021;112:106655. https://doi.org/10.1016/j.ast.2021.106655.Search in Google Scholar
31. Yao, D, Tian, J, Wu, Y, Ouyang, H. Circumferential mode analysis of axial compressor tip flow using Fourier transform and proper orthogonal decomposition. In: ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition; 2018, Vol 2A: Turbomachinery, GT2018-76258.10.1115/GT2018-76258Search in Google Scholar
32. Chen, X, Chu, W, Wang, G, Yan, S, Shen, Z, Guo, Z. Effect of span range of variable-camber inlet guide vane in an axial compressor. Aero Sci Technol 2021;116:106836. https://doi.org/10.1016/j.ast.2021.106836.Search in Google Scholar
33. Mariappan, S, Gardner, AD, Richter, K, Raffel, M. Analysis of dynamic stall using dynamic mode decomposition technique. AIAA J 2013;52:2427–39. https://doi.org/10.2514/1.j052858.Search in Google Scholar
34. Kou, J, Zhang, W, Gao, C. Modal analysis of transonic buffet based on POD and DMD method. Acta Aeronaut Astronaut Sin 2016;37:2679–89.Search in Google Scholar
35. Li, H, Zheng, Q, Jiang, B. Influence of rotor-stator axial clearance on compressor rotating stall characteristics. Aero Sci Technol 2023;139C:108373. https://doi.org/10.1016/j.ast.2023.108373.Search in Google Scholar
36. Sirovich, L. Turbulence and the dynamics of coherent structures. Q Appl Math 1987;45:561–71. https://doi.org/10.1090/qam/910462.Search in Google Scholar
37. Schmid, P. Dynamic mode decomposition of numerical and experimental data. J Fluid Mech 2010;656:5–28. https://doi.org/10.1017/s0022112010001217.Search in Google Scholar
38. Li, H, Zheng, Q, Chen, Z, Duan, Y, Jiang, B, Benini, E. The role of radial secondary flow in the process of rotating stall for a 1.5-stage axial compressor. Aero Sci Technol 2021;115:106752. https://doi.org/10.1016/j.ast.2021.106752.Search in Google Scholar
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