The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Investigation into the Internal Flow Characteristics of a Pump-turbine Model

  • Singh, Patrick Mark (Graduate School, Department of Mechanical Engineering, Mokpo National University) ;
  • Chen, Chengcheng (Graduate School, Department of Mechanical Engineering, Mokpo National University) ;
  • Chen, Zhenmu (Graduate School, Department of Mechanical Engineering, Mokpo National University) ;
  • Choi, Young-Do (Department of Mechanical Engineering, Institute of New and Renewable Energy Technology Research, Mokpo National University)
  • Received : 2014.12.04
  • Accepted : 2015.03.02
  • Published : 2015.08.01
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Abstract

This is a study about one of the most widely used hydro machinery all over the world - pump-turbine. The system has an impeller which pumps water to an upper reservoir during the night and the same impeller acts as a runner for turbine mode during the day for providing stable electrical power to the grid. The internal flow analysis is investigated in this study to help understand how the water passes through the passage of the vanes and blades, providing the designer with useful information on the behavior of recirculation flows which could reduce the efficiency of the pump-turbine. The 100 kW pump-turbine model has H = 32 m, $Q=0.336m^3/s$ and $N=1200min^{-1}$. For this study there are 7 blades, 19 stay vanes and 20 guide vanes. From this study, it was observed that this pump-turbine design showed very good internal flow characteristics with no flow separation and no recirculation flows in normal operation mode.

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References

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