Abstract
Three different inlet configurations, including a original straight pipe and two bend pipes with different axial length, for a high speed low mass flow centrifugal compressor were modeled with whole blade passages and simulated unsteadily by 3D viscous Navier-Stokes equations. The performance disparities of compressor stage were tested and verified by experiments in which dynamic pressure data acquisition of internal flow field was performed. As the result shows, the choke point decreases to lower mass flow rate due to the distortion caused by bend-pipe inlet and is aggravated as the rotation speed increases. The distortion effect spreads circumferentially in impeller and makes the flow structure varied. The longer axial distance bent inlet leads to larger radial distortion and heavy blockage at mid-span under large mass flow mainly causes compressor choke margin narrowed. Bend pipe distortion brings an impact up to diffuser on unsteady pressure pulsation caused by blades sweep and the impact appears more powerful when it is closer to volute tongue.
Similar content being viewed by others
References
Ariga I, Kasai N, Masuda S, et al. The effect of inlet distortion on the performance characteristics of a centrifugal compressor. J Engr Power, 1983, 105(2): 223–230
Zemp A, Kammerer A, Abhari R S. Unsteady CFD investigation on inlet distortion in a centrifugal compressor. ASME Paper, 2008, GT2008-50744
Kammerer A, Abhari R S. Blade forcing function and aerodynamic work measurements in a high speed centrifugal compressor with inlet distortion. ASME Paper, 2009, GT2009-59911
Brune K H, Schiffer H P, Christmann R, et al. Experimental investigations of the disturbed inlet-flow structure caused by mixing geometries and its influence on the performance of a turbocharger centrifugal compressor. ASME Paper, 2009, GT2009-59534
Cui M M. Unsteady flow around suction elbow and inlet guide vanes in a centrifugal compressor. ASME Paper, 2004, GT2004-53273
Kim Y, Engeda A, Aungier R, et al. 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: J Power Energy, 2001, 215(3): 323–338
Engeda A, Kim Y, Aungier R, et al. The inlet flow structure of a centrifugal compressor stage and its influence on the compressor performance. J Fluids Eng, 2003, 125(5): 779–784
Dickmann, H-P, Wimmel T S, Szwedowicz J, et al. Unsteady flow in a turbocharger centrifugal compressor: 3D-CFD-simulation and numerical and experimental analysis of impeller blade vibration. ASME Paper, 2005, GT2005-68235
Reichl A, Kuhnel J, Dickmann H-P. Calculation methods for the determination of blade excitation due to suction elbows in centrifugal compressors. ASME Paper, 2005, GT2009-59178
Dickmann, H-P, Wimmel T S, Szwedowicz J, et al. Unsteady flow in a turbocharger centrifugal compressor: 3D-CFD simulation, impeller blade vibration and vaned diffuser-volute interaction. ASME Paper, 2009, GT2009-59046
Zhou S D, Wen Q. The effects of inlet total pressure radial distortions on the performance characteristics of a centrifugal compressor (in Chinese). Gas Turbine Exp Res, 2005, 18(3): 10–14
Zhou S D. An experimental study of a centrifugal compressor with five different types of radial diffusers (in Chinese). Gas Turbine Exp Res, 2005, 18(1): 21–26
Li D, Yang C, Chen S, et al. Numerical simulation on inlet distortion of centrifugal compressor with 90 degree bent pipe (in Chinese). J Aerosp Power, 2010, 25(11): 2556–2563
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Li, D., Yang, C., Zhou, M. et al. Numerical and experimental research on different inlet configurations of high speed centrifugal compressor. Sci. China Technol. Sci. 55, 174–181 (2012). https://doi.org/10.1007/s11431-011-4635-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11431-011-4635-2