Research of transient rotor–stator interaction effect in a mixed-flow pump under part-load conditions

  • Weidong Cao
  • Wei LiEmail author
  • Leilei Ji
  • Weidong ShiEmail author
  • Zhanxiong Lu
  • Ramesh K. Agarwal
Technical Paper


In order to analyze the unsteady flow characteristic and the pressure fluctuation features of mixed-flow pump caused by the interaction between the impeller and guide vanes under part-load conditions, the unsteady flow field in the mixed-flow pump was numerically simulated based on the standard kε turbulence model. The pressure distribution and the velocity distribution in the rotor–stator interaction (RSI) zones were acquired, and the time domain and frequency domain of the pressure fluctuation were emphatically analyzed. The results showed that the velocity within the rotor–stator interaction zones is mainly affected by the relative position of impeller and guide vane. With the decrease in flow rate condition, the flow fields become more violent and more vortexes generate in the RSI zone, which causes much energy losses. With the rotation of impeller, the vortexes generating from RSI zones move into the guide vane and dissipate in the guide vane passage in the end. The pressure pulsations at various monitoring points fluctuate periodically, and there appear four peak and four trough values with the same number of leaves. The dominant frequency of pressure pulsation was approximate to the impeller blade passing frequency (BPF). Within the rotor–stator interaction zones, the pressure pulsation coefficient in the rotor–stator interaction zone of the mixed-flow pump changes most obviously. The BPF and double and triple frequency of the pressure pulsation are dominant frequencies, and the frequency distribution range is relatively concentrated.


Mixed-flow pump Numerical simulation Pressure fluctuation Part-load conditions Rotor–stator interaction (RSI) 



The work was sponsored by the National Key R&D Program Project (No. 2017YFC0403703), National Natural Science Foundation of China (Nos. 51679111, 51409127 and 51579118), PAPD, Key R&D Program Project in Jiangsu Province (BE2016319, BE2017126), Natural Science Foundation of Jiangsu Province (Nos. BK20161472, BK20160521), Science and Technology Support Program of Changzhou (No. CE20162004), Key R&D Program Project of Zhenjiang (No. SH2017049), and Scientific Research Start Foundation Project of Jiangsu University (No. 13JDG105), Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX19_1601).

Compliance with ethical standards

Conflict of Interest

The authors declare that they have no conflicts of interest.


  1. 1.
    Varchola M, Hlbocan P (2012) Geometry design of a mixed flow pump using experimental results of on internal impeller flow. Procedia Eng 39:168–174CrossRefGoogle Scholar
  2. 2.
    Bing H, Tan L, Cao S, Lu L (2012) Prediction method of impeller performance and analysis of loss mechanism for mixed-flow pump. Sci China Technol Sci 55(7):1988–1998CrossRefGoogle Scholar
  3. 3.
    Li W, Zhang Y, Shi W, Ji L, Yang Y, Ping Y (2018) Numerical simulation of transient flow field in a mixed-flow pump during starting period. Int J Numer Method Heat Fluid Flow 28(4):607771CrossRefGoogle Scholar
  4. 4.
    Li W, Ji L, Shi W, Zhou L, Jiang X, Zhang Y (2018) Fluid-structure interaction study of a mixed-flow pump impeller during startup. Eng Comput 35(1):18–34CrossRefGoogle Scholar
  5. 5.
    Bai L, Zhou L, Jiang X, Pang Q, Ye D (2018) Vibration in a multistage centrifugal pump under varied conditions. Shock Vib 2019:2057031Google Scholar
  6. 6.
    Huang RF, Luo XW, Ji B, Wang P, Yu A, Zhai ZH, Zhou JJ (2015) Multi-objective optimization of a mixed-flow pump impeller using modified NSGA-II algorithm. Sci China Technol Sci 58(12):2122–2130CrossRefGoogle Scholar
  7. 7.
    Li W, Shi W, Xu Y, Zhou L, Zou P (2013) Effects of guide vane thickness on pressure pulsation of mixed-flow pump in pumped-storage power station. J VibroEng 15(3):1177–1185Google Scholar
  8. 8.
    Zhang W, Yu Y, Chen H (2009) Numerical simulation of unsteady flow in centrifugal pump impeller at off-design condition by hybrid RANS/LES approaches. Int J High Perform Comput Appl 2009:571–578Google Scholar
  9. 9.
    Zhou L, Shi W, Cao W, Yang H (2015) CFD investigation and PIV validation of flow field in a compact return diffuser under strong part-load conditions. Sci China Technol Sci 58(3):405–414CrossRefGoogle Scholar
  10. 10.
    Bai L, Zhou L, Han C, Zhu Y, Shi W (2019) Numerical study of pressure fluctuation and unsteady flow in a centrifugal pump. Processes 7(6):354CrossRefGoogle Scholar
  11. 11.
    Feng J, Benra FK, Dohmen HJ (2009) Unsteady flow visualization at part-load conditions of a radial diffuser pump: by PIV and CFD. J Vis Jpn 12(1):65–72CrossRefGoogle Scholar
  12. 12.
    Li W, Zhou L, Shi W, Ji L, Yang Y, Zhao X (2017) PIV experiment of the unsteady flow field in mixed-flow pump under part loading condition. Exp Therm Fluid Sci 83:191–199CrossRefGoogle Scholar
  13. 13.
    Zhang N, Gao B, Li Z, Ni D, Jiang Q (2018) Unsteady flow structure and its evolution in a low specific speed centrifugal pump measured by PIV. Exp Therm Fluid Sci 97:133–144CrossRefGoogle Scholar
  14. 14.
    Grönman A, Backman J, Hansen-Haug M, Laaksonen M, Alkki M, Aura P (2018) Experimental and numerical analysis of vaned wind turbine performance and flow phenomena. Energy 159:827–841CrossRefGoogle Scholar
  15. 15.
    Javadi A, Nilsson H (2015) Time-accurate numerical simulations of swirling flow with rotor-stator interaction. Flow Turbul Combust 95(4):755–774CrossRefGoogle Scholar
  16. 16.
    Qin W, Tsukamoto H (1997) Theoretical study of pressure fluctuations downstream of a diffuser pump impeller—part 1: fundamental analysis on rotor-stator interaction. J Fluid Eng 119(3):647–652CrossRefGoogle Scholar
  17. 17.
    Arndt N, Acosta AJ, Brennen CE, Caughey TK (1990) Experimental investigation of rotor-stator interaction in a centrifugal pump with several vaned diffusers. J Turbomach 112(1):98–108CrossRefGoogle Scholar
  18. 18.
    Wenwu Z, Zhiyi Y, Baoshan Z (2017) Influence of tip clearance on pressure fluctuation in low specific speed mixed-flow pump passage. Energies 10(2):148CrossRefGoogle Scholar
  19. 19.
    Lucius A, Brenner G (2010) Unsteady CFD simulations of a pump in part load conditions using scale-adaptive simulation. Int J Heat Fluid F 31(6):1113–1118CrossRefGoogle Scholar
  20. 20.
    Coleman HW, Stern F (1997) Uncertainties and CFD code validation. J Fluid Eng 119(4):795–803CrossRefGoogle Scholar
  21. 21.
    Simonsen CD, Stern F (2003) Verification and validation of RANS maneuvering simulation of Esso Osaka: effects of drift and rudder angle on forces and moments. Comput Fluids 32(10):1325–1356CrossRefGoogle Scholar
  22. 22.
    Yabin L, Lei T (2018) Method of C groove on vortex suppression and energy performance improvement for a NACA0009 hydrofoil with tip clearance in tidal energy. Energy 155:448–461CrossRefGoogle Scholar
  23. 23.
    Liu M, Tan L, Cao SL (2019) Cavitation–vortex–turbulence interaction and one-dimensional model prediction of pressure for hydrofoil ALE15 by large Eddy simulation. J Fluid Eng 141(2):021103-1–021103-17CrossRefGoogle Scholar

Copyright information

© The Brazilian Society of Mechanical Sciences and Engineering 2019

Authors and Affiliations

  1. 1.National Research Center of PumpsJiangsu UniversityZhenjiangChina
  2. 2.Institute of Fluid Engineering Equipment TechnologyJiangsu UniversityZhenjiangChina
  3. 3.College of Mechanical EngineeringNantong UniversityNantongChina
  4. 4.Department of Mechanical Engineering and Materials ScienceWashington University in St. LouisSt. LouisUSA

Personalised recommendations