Journal of Mechanical Science and Technology

, Volume 32, Issue 2, pp 697–702 | Cite as

CFD analysis of performance change in accordance with inner surface roughness of a double-entry centrifugal pump

  • Sung Eun Lim
  • Chang Hyun SohnEmail author


In this study, the performance change of a double suction centrifugal pump (Q = 60 m3/min, H = 97 m) was analyzed using Computational fluid dynamics (CFD) to investigate the effects of internal surface roughness of pump components. The calculated performance of the pump using CFD is in strong agreement with the experimental results, which used a smooth wall case. In terms of the predicted total pump efficiency with the surface roughness case, the CFD results indicate that the pump efficiency is reduced by approximately 3.0 %. CFD results reveal that the most significant roughness effect on the pump components is that of the impeller, whereas the smallest effect is that of the inlet casing. Furthermore, the CFD results demonstrate that the pump performance is strongly dependent on the outward shroud surface roughness of the impeller.


CFD Pump coating Pump efficiency Surface roughness 


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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.K-waterDaejeonKorea
  2. 2.School of Mechanical EngineeringKyungpook National UniversityDaeguKorea

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