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Alternative Design of Double-Suction Centrifugal Pump to Reduce the Effects of Silt Erosion

Author

Listed:
  • Jing Dong

    (State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, No. 8 South East Lake Road, Wuhan 430072, China)

  • Zhongdong Qian

    (State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, No. 8 South East Lake Road, Wuhan 430072, China)

  • Biraj Singh Thapa

    (Turbine Testing Laboratory, Kathmandu University, P.O. Box 6250, Dhulikhel, Nepal)

  • Bhola Thapa

    (Turbine Testing Laboratory, Kathmandu University, P.O. Box 6250, Dhulikhel, Nepal)

  • Zhiwei Guo

    (State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, No. 8 South East Lake Road, Wuhan 430072, China)

Abstract

Large amounts of sediment in the Himalayan rivers causes severe silt erosion to the hydraulic machinery operating along these rivers. In this study, the effects of silt characteristics on the silt-erosion characteristics of a double-suction centrifugal pump was studied and the anti-erosion property of bionic convex domes on silt erosion under these conditions was explored by using computational-fluid-dynamics methods, partly supported by a painted-blade erosion experiment. The results show that the silt size affects the erosion position and erosion strength, whereas the silt concentration mainly affects the erosion strength for the studied range. The bionic convex domes provide an effective solution to improve the silt erosion for most of the investigated silt-laden conditions by decreasing the erosion rate and the erosion area of the blade. The anti-erosion mechanism was studied combined with large eddy simulation. The analysis shows that the relative velocity of water around the blade surface is changed and the mass flow rate of silt particles hitting the blade is reduced by inducing swirling flows around the bionic convex domes.

Suggested Citation

  • Jing Dong & Zhongdong Qian & Biraj Singh Thapa & Bhola Thapa & Zhiwei Guo, 2019. "Alternative Design of Double-Suction Centrifugal Pump to Reduce the Effects of Silt Erosion," Energies, MDPI, vol. 12(1), pages 1-22, January.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:1:p:158-:d:194630
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    References listed on IDEAS

    as
    1. Padhy, M.K. & Saini, R.P., 2012. "Study of silt erosion mechanism in Pelton turbine buckets," Energy, Elsevier, vol. 39(1), pages 286-293.
    2. Thapa, Biraj Singh & Dahlhaug, Ole Gunnar & Thapa, Bhola, 2017. "Sediment erosion induced leakage flow from guide vane clearance gap in a low specific speed Francis turbine," Renewable Energy, Elsevier, vol. 107(C), pages 253-261.
    3. Khanal, Krishna & Neopane, Hari P. & Rai, Shikhar & Thapa, Manoj & Bhatt, Subendu & Shrestha, Rajendra, 2016. "A methodology for designing Francis runner blade to find minimum sediment erosion using CFD," Renewable Energy, Elsevier, vol. 87(P1), pages 307-316.
    4. Koirala, Ravi & Neopane, Hari Prasad & Shrestha, Oblique & Zhu, Baoshan & Thapa, Bhola, 2017. "Selection of guide vane profile for erosion handling in Francis turbines," Renewable Energy, Elsevier, vol. 112(C), pages 328-336.
    5. Padhy, M.K. & Saini, R.P., 2009. "Effect of size and concentration of silt particles on erosion of Pelton turbine buckets," Energy, Elsevier, vol. 34(10), pages 1477-1483.
    6. Thapa, Biraj Singh & Thapa, Bhola & Dahlhaug, Ole Gunnar, 2012. "Current research in hydraulic turbines for handling sediments," Energy, Elsevier, vol. 47(1), pages 62-69.
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    Cited by:

    1. Jian Li & Xing Zhou & Hongbo Zhao & Chengqi Mou & Long Meng & Liping Sun & Peijian Zhou, 2024. "Bionic Strategies for Pump Anti-Cavitation: A Comprehensive Review," Energies, MDPI, vol. 17(20), pages 1-25, October.
    2. Xiaodong Wang & Yunliang Chen & Mengqiu Li & Yong Xu & Bo Wang & Xiaoqiang Dang, 2020. "Numerical Study on the Working Performance of a Streamlined Annular Jet Pump," Energies, MDPI, vol. 13(17), pages 1-15, August.

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