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A novel energy losses dependence on integral swirl flow parameters in an elbow draft tube of a Kaplan turbine

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  • Božić, Ivan

Abstract

Energy losses in the region between the runner and outlet section of a conventional hydraulic turbine have been the subject of investigation for a long time. In this paper as well, elbow draft tube losses are determined for the relevant wide range on-cam operating modes of the Kaplan turbine using a contemporary approach. The research considers the impact of swirl flow parameters, defined for the referent inlet of the draft tube, on the hydraulic losses. According to the methodology and obtained numerical results, a new formula for the calculation of draft tube losses is proposed. In the process of a hydropower plant refurbishment, the presented approach may enable more efficient and economically justified consideration of the performance improvement of the entire double regulated hydraulic turbine, especially in the case of keeping the existing elbow draft tube.

Suggested Citation

  • Božić, Ivan, 2021. "A novel energy losses dependence on integral swirl flow parameters in an elbow draft tube of a Kaplan turbine," Renewable Energy, Elsevier, vol. 175(C), pages 550-558.
    • Handle: RePEc:eee:renene:v:175:y:2021:i:c:p:550-558
    DOI: 10.1016/j.renene.2021.05.014
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    References listed on IDEAS

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    1. Rahi, O.P. & Chandel, A.K., 2015. "Refurbishment and uprating of hydro power plants—A literature review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 48(C), pages 726-737.
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    Cited by:

    1. Zhumei Luo & Cong Nie & Shunli Lv & Tao Guo & Suoming Gao, 2022. "The Effect of J-Groove on Vortex Suppression and Energy Dissipation in a Draft Tube of Francis Turbine," Energies, MDPI, vol. 15(5), pages 1-20, February.

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