Numerical Investigation of the Impact of Intake Pipelines on the Performance and Flow Characteristics of a Centrifugal Compressor

Document Type : Regular Article

Authors

1 College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China

2 Key Laboratory of Mechanics on Disaster and Environment in Western China, Lanzhou, Gansu, 730000, China

3 Department of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou 730050, China

4 Key Laboratory of Fluid Machinery and Systems, Lanzhou, Gansu, 730050, China

5 China North Engine Research Institute, Tianjin, 300400, China

Abstract

Due to the installation space constraints in practical applications, centrifugal compressors often utilize bent intake pipes. Quantifying the correlation between the centrifugal compressor’s operating performance and the flow dynamics within curved inlet tubes is essential. In this research, the accuracy of the numerical methodology was validated using the experimental outcomes. Subsequently, the centrifugal compressor’s performance was simulated for two intake curved ducts, i.e., Pc with a coplanar central axis and Pnc with a non-coplanar central axis, followed by the analysis of the flow characteristics for each intake configuration. The results indicated that Pc produced a symmetrical swirling flow field at the outlet, which was characterized by a lower plane superimposed distortion intensity (PSDI), while Pnc generated an asymmetrical offset swirling flow field with a higher PSDI. The PSDI increased with the flow rate, reaching maximum values of 0.137 for Pc and 0.386 for Pnc. Compared to the inlet straight tube, the performances of the centrifugal compressor connected to Pc and Pnc both decreased, while Pnc exhibited a more significant performance deterioration degree. Under high-speed conditions, the maximum degradation degrees of pressure ratio for Pc and Pnc reached approximately 5.7% and 9.8%, respectively, while the efficiency reduction degree reached approximately 5.3% and 8.7%, respectively. The performance reduction degree for both bent pipes increased with the rising PSDI, exhibiting an exponential correlation. The flow characteristics of the intake pipelines affected the flow behavior within the impeller, with the flow field variation locations closely resembling the distorted regions of the bent pipes.

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Ariga, I., Kasai, N., Masuda, S., Watanabe, Y., & Watanabe, I. (1983). The effect of inlet distortion on the performance characteristics of a centrifugal compressor. Journal of Engineering for Gas Turbines and Power, 105(2), 223–230. https://doi.org/10.1115/1.3227406
Broatch, A., Ruiz, S., J. García-Tíscar, & Roig, F. (2018). On the influence of inlet elbow radius on recirculating backflow, whoosh noise and efficiency in turbocharger compressors. Experimental Thermal & Fluid Science, 96, 224–233. https://doi.org/10.1016/j.expthermflusci.2018.03.011
Cheng, X. R., Bao, W. R., Fu, L., & Ye, X. T. (2019). Steady characteristics of internal flow in annular casing of nuclear main pump. Journal of Lanzhou University of Technology, 45(1), 49-56. https://doi.org/10.3969/j.issn.1673-5196.2019.01.010
Djodikusumo, I., Diasta, I. N., & Sanjaya Awaluddin, I. (2016). Geometric modeling of a propeller turbine runner using ANSYS BladeGen, meshing using ANSYS turboGrid and fluid dynamic simulation using ANSYS Fluent. Applied Mechanics and Materials, 842, 164–177. https://doi.org/10.4028/www.scientific.net/AMM.842.164
Engeda, A., Kim, Y., Aungier, R., & Direnzi, G. (2003). The inlet flow structure of a centrifugal compressor stage and its influence on the compressor performance. Journal of Fluids Engineering, 125(5), 779–785. https://doi.org/10.1115/1.1601255
Grimaldi, A., & Michelassi, V. (2019). The impact of inlet distortion and reduced frequency on the performance of centrifugal compressors. Journal of Engineering for Gas Turbines and Power, 141(2), 1–9. https://doi.org/10.1115/1.4040907
Han, F. H., Mao, Y. J., & Tan, J. J. (2016). Influences of flow loss and inlet distortions from radial inlets on the performances of centrifugal compressor stages. Journal of Mechanical Science & Technology, 30(10), 4591–4599. https://doi.org/10.1007/s12206-016-0930-y
Jahani, Z., Khaleghi, Z., & Tabejamaat, S. (2022). Using tip injection to stability enhancement of a transonic centrifugal impeller with inlet distortion. Journal of Applied Fluid Mechanics, 15(6), 1815–1824. https://doi.org/10.47176/jafm.15.06.1089
Jiang, C. L., & Zhu, X. Y. (2022). Structural optimization design and internal flow characteristics analysis of axial flow fan. Journal of Drainage and Irrigation Machinery Engineering, 40(7), 707-713. https://doi.org/10.3969/j.issn.1674-8530.20.0235
Kammerer, A., & Abhari, R. S. (2009). Blade forcing function and aerodynamic work measurements in a high speed centrifugal compressor with inlet distortion. Journal of Engineering for Gas Turbines & Power, 132(9), 95–105. https://doi.org/10.1115/1.4000614
Kim, Y., Engeda, A., Aungier, R., & Direnzi, G. (2001). The influence of inlet flow distortion on the performance of a centrifugal compressor and the development of an improved inlet using numerical simulations. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 215(3), 323–338. https://doi.org/10.1243/0957650011538550
Li, C., Bai, S. Z., Li, Y. Z., Zhang, J. J., & Zhang, J. M. (2020). Effects of curved tube intake on centrifugal compressor efficiency. Internal Combustion Engine & Powerplant, 37(3), 26–31. https://doi.org/10.19471/j.cnki.1673-6397.2020.06.005
Li, D., Yang, C., Zhou, M., Zhu, Z. F., & Wang, H. (2012). Numerical and experimental research on different inlet configurations of high speed centrifugal compressor. Science China (Technological Sciences), 55, 174–181. https://doi.org/10.1007/s11431-011-4635-2
Li, M. Y., Lu, Y. J., Gong, Z.Q., & Yuan, W. (2006). PIV investigation of the internal flow in an axial flow compressor rotor under inlet distortion. Journal of Aerospace Power, 21(003), 461–466. https://doi.org/CNKI:SUN:HKDI.0.2006-03-004
Li, W. X., Li, Z. G., Han, W., Li, D. C., Yan, S. N., & Zhou, J. P. (2025). Study of the flow characteristics of pumped media in the confined morphology of a ferrofluid pump with annular microscale constraints. Journal of Fluids Engineering, 147(2), 021201. https://doi.org/10.1115/1.4066486
Li, W. X., Li, Z. G., Han, W., Li, Y. B., Yan, S. N., Zhao, Q., & Gu, Z. Y. (2023a). Pumping-velocity variation mechanisms of a ferrofluid micropump and structural optimization for reflow inhibition. Physics of Fluids, 35(5), 052005. https://doi.org/10.1063/5.0149130
Li, W. X., Li, Z. G., Han, W., Tan, S. W., Yan, S. N., Wang, D. W., & Yang, S. Q. (2023b). Time-mean equation and multi-field coupling numerical method for low-Reynolds-number turbulent flow in ferrofluid. Physics of Fluids, 35(12), 125145. https://doi.org/10.1063/5.0179961
Li, X., Huang, N., He, K., Tong, D., Zhang, Y.L., & Zhang, J. (2024). On erosion wear of flat specimens incorporating roughness angle correction. Physics of Fluids, 36, 109102. https://doi.org/10.1063/5.0226359
Moosania, S. M., & Zheng, X. Q. (2017). Effect of internal heat leakage on the performance of a high pressure ratio centrifugal compressor. Applied Thermal Engineering, 111, 317–324. https://doi.org/10.1016/j.applthermaleng.2016.09.030
Nili-Ahmadabadi, M., Hajilouy-Benisi, A., Durali, M., & Ghadak, F. (2008). Investigation of a centrifugal compressor and study of the area ratio and tip clearance effects on performance. Journal of Thermal Science, 17(4), 314–323. https://doi.org/10.1007/s11630-008-0314-1
Raman, S., & Kim, H. (2018). Computational analysis of the performance characteristics of a supercritical CO2 centrifugal compressor. Computation, 6(4), 54. https://doi.org/10.3390/computation6040054
Sheoran, Y., Bouldin, B., & Krishnan, P. M. (2011). Compressor performance and operability in swirl distortion. Journal of Turbomachinery, 134(4), 041008. https://doi.org/10.1115/GT2010-22777
Sun, Z., Wang, B., Zheng, X., Kawakubo, T., & Numakura, R. (2020). Effect of bent inlet pipe on the flow instability behavior of centrifugal compressors. Chinese Journal of Aeronautics, 33(8), 2099–2109. https://doi.org/10.1016/j.cja.2020.02.013
Tian, H. Y., Tong, D., Liu, Y., Xing, W. D., Chen, D. F., & Gao, C. (2021a). The effect of blade trailing edge swept on the performance of centrifugal compressor. Journal of Engineering Thermophysics, 42, 399–406.
Tian, H. Y., Hou, K., Tong, D., & Liu, X.Y. (2021b). Effect of inlet end-wall guide vanes on the performance of centrifugal compressor. Chinese Internal Combustion Engine Engineering, 42(6), 95–102. https://doi.org/10.13949/j.cnki.nrjgc.2021.06.013
Tian, Y. B., Tang, Y. H., Wang, Z. H., & Xi, G. (2017, June 26-30). Influence of adjustable inlet guide vanes on the performance characteristics of a shrouded centrifugal compressor. Proceedings of ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, Charlotte, NC, USA. V02CT44A020. https://doi.org/10.1115/GT2017-63918
Toge, T. D., & Pradeep, A. M. (2017). Experimental investigation of stall inception of a low speed contra rotating axial flow fan under circumferential distorted flow condition. Aerospace Science and Technology, 70, 534–548. https://doi.org/10.1016/j.ast.2017.08.041
Tong, D., Tian, H. Y., Liu, X. Y., Liu. Y., Gao, C., & Li, X. (2021). Effect of inlet bend pipe on the centrifugal compressor performance and its optimization design. Acta Armamentarii, 42(4), 9. https://doi.org/10.3969/j.issn.1000-1093.2021.04.004
Wang, H. Y., Yang, D. F., Zhu, Z. C., Zhang, H. J., & Zhang, Q. (2023). Effect of interstage pipeline on the performance of two-stage centrifugal compressors for automotive hydrogen fuel cells. Applied Science-Basel, 13(1), 503. https://doi.org/10.3390/app13010503
Xin, J. C., Wang, X. F., & Liu, H. T. (2016). Numerical investigation of variable inlet guide vanes with trailing-edge dual slots to decrease the aerodynamic load on centrifugal compressor impeller. Advances in Mechanical Engineering, 8(3), 1–14. https://doi.org/10.1177/1687814016640653
Xu, Z. L., Da, X. Y., & Fan, Z. L. (2017). Assessment of swirl distortion of serpentine inlet based on five-hole probe. Acta Aeronautica et Astronautica Sinica, 38(12), 53–62. https://doi.org/10.7527/S1000-6893.2017.121342
Xu, Z. L., Gao, R. Z., & Da, X. Y. (2018). Assessment and measurement of total pressure distortion based on five-hole-probe for S-shaped inlet. Journal of Experiments in Fluid Mechanics, 32(4), 78–86. https://doi.org/CNKI:SUN:LTLC.0.2018-04-010
Yan, C., Yu, J., Xu, J. L., Fan, J. J., & Gao, R. Z. (2011). On the achievements and prospects for the methods of computational fluid dynamics. Advances in Mechanics, 41(5), 562–589. https://doi.org/10.6052/1000-0992-2011-5-lxjzj2010-082
Zhang, W., Wang, Y., & Xu, Z. (2001). Experimental study progress of internal flow and rotor/stator interaction in turbomachinery. Fluid Machinery, 29, 6–10. https://doi.org/10.3969/j.issn.1005-0329.2001.08.001
Zhao, B., Sun, H., Wang, L. L., & Song, M. X. (2017). Impact of inlet distortion on turbocharger compressor stage performance. Applied Thermal Engineering, 124(1), 393. https://doi.org/10.1016/j.applthermaleng.2017.05.181
Zhou, S. D., & Wen, Q. (2005). The effect of inlet total pressure radial distortions on the performance characteristics of a centrifugal compressor. Gas Turbine Experiment and Research, 18(3), 5. https://doi.org/10.3969/j.issn.1672-2620.2005.03.003