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Three-dimensional flow simulation of transient power interruption process of a prototype pump-turbine at pump mode

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Abstract

The transient power failure process of a prototype pump-turbine was studied numerically by three-dimensional (3-D) simulations. Fluid coupling and dynamic mesh (DM) method were used to calculate the rotational speed of the runner. Simulations were performed based on turbulence model. Specific transient characteristics, such as the flow rate, head, rotational speed, were analyzed. The pumpturbine had a minimum head and a maximum axial force when the flow rate was 0 during the transient process. Pressure fluctuations increased when the pump-turbine ran at pump braking mode. Reverse flow in the casing as well as stall phenomenon in the runner had a great effect on the change of head. Pressure in the runner was greatly reduced when the pump-turbine ran at pump braking mode. The computational method could be used to interpret the abnormal phenomenon by the analysis of flow mechanism during a transient process.

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Authors and Affiliations

  1. Institute of Chemical Process Machinery, Zhejiang University, Hangzhou, 310027, China

    Jintao Liu & Leqin Wang

  2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China

    Shuhong Liu, Yuekun Sun & Yulin Wu

  3. Department of Ocean Science and Engineering, Zhejiang University, Hangzhou, 310058, China

    Lei Jiao

Authors
  1. Jintao Liu
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  2. Shuhong Liu
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  3. Yuekun Sun
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  4. Lei Jiao
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  5. Yulin Wu
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  6. Leqin Wang
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Corresponding author

Correspondence to Lei Jiao.

Additional information

Recommended by Associate Editor Yang Na

Jintao Liu received Bachelor degree in chemical process equipment from China University Of Petroleum, Shandong, China in 2008, then the Ph.D. degrees in fluid mechanical engineering from the Zhejiang University, Hangzhou, China in 2013. He has been engaged in researches about hydraulic design and flow instability of fluid machineries.

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Liu, J., Liu, S., Sun, Y. et al. Three-dimensional flow simulation of transient power interruption process of a prototype pump-turbine at pump mode. J Mech Sci Technol 27, 1305–1312 (2013). https://doi.org/10.1007/s12206-013-0313-6

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  • DOI: https://doi.org/10.1007/s12206-013-0313-6

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