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  • Numerical and in-situ investigations of water hammer effects in Drava river Kaplan turbine hydropower plants [Elektronski vir]
    Bergant, Anton ; Gregorc, Boštjan ; Gale, Janez, 1977-
    This paper deals with critical flow regimes that may induce unacceptable water hammer in Kaplan turbine hydropower plants. Water hammer analysis should be performed for normal, emergency and ... catastrophic operating conditions. Hydropower plants with Kaplan turbines are usually comprised of relatively short inlet and outlet conduits. The rigid water hammer theory can be used for this case. For hydropower plants with long penstocks the elastic water hammer should be used. Some Kaplan turbine units are installed in systems with long open channels. In this case, water level oscillations in the channels should be carefully investigated. Computational results are compared with results of measurements in recently rehabilitated seven Drava river hydroelectric power plants in Slovenia. Water hammer in the six power plants is controlled by appropriate adjustment of the wicket gates and runner blades closing/opening manoeuvres. Due to very long inflow and outflow open channels in Zlatoličje HPP a special vaned pressure regulating device attenuates extreme pressures in Kaplan turbine flow-passage system and controls unsteady flow in both open channels. Comparisons of results include normal operating regimes. The agreement between computed and measured results is reasonable.
    Source: 26th IAHR Symposium on Hydraulic Machinery and Systems, August 19-23, 2012, Tsinghua University, Beijing, China [Elektronski vir] (Vol. 15, pt. 5, 2012, str. [1-8])
    Type of material - conference contribution
    Publish date - 2012
    Language - english
    COBISS.SI-ID - 12486939

    Link(s):

    http://iopscience.iop.org/article/10.1088/1755-1315/15/5/052001/meta
    DOI

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