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  • Progress in analytical modeling of water hammer [Elektronski vir]
    Urbanowicz, Kamil ...
    In this paper analytical formulas of water hammer known from the literature are simplified to the shortest possible mathematical form based on dimensionless parameters: dimensionless time, water ... hammer number, etc. Novel formulas are determined, for example for the flow velocity and wall shear stress in the Muto and Takahashi solution. A complete solution in the Laplace domain is presented and the problem of its inverse transformation is discussed. A series of comparative studies of analytical solutions with numerical solutions and the results of experimental research were carried out. The compared analytical solutions, taking into account the frequency-dependent nature of the hydraulic resistances, show very good agreement with the experimental results in a wide range of water hammer numbers, in particular when Wh <= 0.1. On the other hand, it turned out that the analytical model based on the quasi-steady friction in great detail simulates dynamic pressure response in systems characterized by a high value of the water hammer number Wh <= 0.5.
    Vir: FEDSM2021 [Elektronski vir] : proceedings of ASME 2021 Fluids Engineering Division Summer Meeting : August 10-12, 2021, Virtual, Online. Vol. 1, Aerospace engineering division joint track, Computational fluid dynamics (Str. 1-12)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2021
    Jezik - angleški
    COBISS.SI-ID - 79510531

    Povezava(-e):

    https://asmedigitalcollection.asme.org/FEDSM/proceedings-abstract/FEDSM2021/85284/V001T02A021/1120912

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