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Static pressure recovery analysis in the vane island diffuser of a centrifugal pump

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Abstract

The overall performance of a vane-island type diffuser of a centrifugal pump model was obtained by means of directional probe traverses. These measurements were performed in an air model of a real hydraulic pump for five volume flow rates. Directional probe traverses are performed with a classical three-hole probe to cover most of the complete inlet section of the diffuser from hub to shroud and from pressure to suction side. Existing Particle image velocimetry (PIV) measurement results are also used to compare probe measurement results between the inlet and outlet throats of vane island diffuser at mid-span. Some assistance from already existing unsteady calculation, including leakage effects, is used to evaluate the numerical approach capability and to correctly define the mean initial conditions at impeller’s outlet section. Pressure recovery and the measured total pressure loss levels inside this particular vane diffuser geometry are then calculated. Detailed analysis of the flow structure at the inlet section of the vane island diffuser is presented to focus on pressure evolution inside the entire diffuser section for different flow rates. The combined effects of incidence angle and blockage distributions along hub to shroud direction are found to play an important role on loss distribution in such a diffuser.

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Authors and Affiliations

  1. National Research Center of Pumps, Jiangsu University, Zhenjiang, 212013, China

    Qiaorui Si

  2. UMR CNRS 8107 Ecole Centrale de Lille, LML, Lille, 59046, France

    Patrick Dupont

  3. UMR CNRS 8107, Arts et Métiers PARISTECH, LML, Lille, 59046, France

    Annie-Claude Bayeul-Lainé, Antoine Dazin, Olivier Roussette & Gérard Bois

Authors
  1. Qiaorui Si
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  2. Patrick Dupont
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  3. Annie-Claude Bayeul-Lainé
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  4. Antoine Dazin
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  5. Olivier Roussette
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  6. Gérard Bois
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Corresponding author

Correspondence to Gérard Bois.

Additional information

Recommended by Guest Editor Hyung Hee Cho and Yulin Wu

Qiaorui Si received his doctor degree from National Research Center of Pumps, Jiangsu University in 2014. And he worked at Laboratoire de Mécanique de Lille in Arts et Métiers ParisTech, France as a Joint-Ph.D student in 2013. His research interests include unsteady flow, rotor-stator interaction in pump machinery.

Gérard Bois was born on March 3rd, 1950. He is the full professor at Laboratoire de Mécanique de Lille in Arts et Métiers ParisTech, France. He was the chairman of European Conference on Turbomachinery during 2008 and 2012. His research topics focus on rotor-stator interactions in centrifugal turbo-machines, non-stationary problems in pumps and inducers, fast start-up models in a centrifugal pump.

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Si, Q., Dupont, P., Bayeul-Lainé, AC. et al. Static pressure recovery analysis in the vane island diffuser of a centrifugal pump. J Mech Sci Technol 30, 549–556 (2016). https://doi.org/10.1007/s12206-016-0108-7

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  • DOI: https://doi.org/10.1007/s12206-016-0108-7

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