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  • Water hammer investigation of shut-down of high-head hydropower plant at very high Reynolds number flows
    Karadžić, Uroš ...
    This paper investigates water hammer phenomena in a refurbished high-head hydropower plant Perućica, Montenegro during shut-down of the entire plant - simultaneous closure of the seven Pelton turbine ... units. In-situ measuring campaign during a number of steady and unsteady conditions has been performed on the plant's open channel, pressurized and tail race sub-systems with primarily goal to define measures that will enable achievement of the plant's installed capacity. In-house software written in Visual Fortran and based on the method of characteristics (MOC) has been developed. Closure of the Pelton turbine distributors is modelled by the two-speed closing law. Dissipation torques in turbine housing and shaft bearings are considered in calculation of the Pelton turbine unit rotational speed change. Numerical results given for standard quasi-steady and convolution based unsteady friction model are compared with results of measurements at flows with very high initial Reynolds numbers (larger than 10^7). Developed numerical model shows good agreement with the results of site measurements. It is shown that the unsteady friction has a small impact on pressure histories in Perućica HPP.
    Vir: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Vol. 65, no. 7/8, July-Aug. 2019, str. 430-440, SI 54)
    Vrsta gradiva - članek, sestavni del
    Leto - 2019
    Jezik - angleški
    COBISS.SI-ID - 16717851

    Povezava(-e):

    https://www.sv-jme.eu/sl/article/water-hammer-investigation-of-shut-down-of-high-head-hydropower-plant-at-very-high-reynolds-number-flows/
    Digitalna knjižnica Slovenije - dLib.si
    DOI

vir: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Vol. 65, no. 7/8, July-Aug. 2019, str. 430-440, SI 54)
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