Current Tendencies of Water Resources Using for Providing the Energy Needs of Society

Riabenko, Oleksandr; Klyuha, O. O.; Tymoshchuk, Volodymyr; Halych, Oksana

doi:10.1007/978-3-030-27011-7_49

Cited by 4 publications

(3 citation statements)

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“…As mentioned above, to estimate the influence of near-critical flow parameters on the operation of hydraulic structures, it is recommended to use mathematical and hydraulic simulation. During the theoretical studying of near-critical flows a mathematical model was developed to calculate the free-surface profile of undular jump and cnoidal waves that is based on the possible presence of non-hydrostatic pressure distribution in their initial crosssection: (1) where ηc = hc/h1 -dimensionless depth under the first wave crest; h1, Fr1 -depth and Froude number in the initial cross-section of phenomenon, respectively; t1 -coefficient of hydrodynamic pressure; Δ and k -parameters of cnoidal waves.…”

Section: Simulation Of Near-critical Flows 31 Hydraulic and Mathematmentioning

confidence: 99%

“…A comparison between the theoretical free-surface profile was conducted, which was calculated by equation system (1) and experimental data ( Fig. 2).…”

Section: Simulation Of Near-critical Flows 31 Hydraulic and Mathematmentioning

confidence: 99%

“…Current issues of water resources management are often connected with the production of electricity for fulfilling the energy needs of society [1] and providing flood control. The solution of these problems requires the building of different types of hydraulic constructions, such as water spillways, sluice gates, regulators, dams, dikes, and channels.…”

Section: Introductionmentioning

confidence: 99%

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The particularities of near-critical flows formation in open channels

et al. 2020

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This article considers the current problems of near-critical flows. It provides short characteristics of each phenomenon and describes the cases of near-critical flow formation during the operation of the different hydraulic structures. Each of the considered phenomena has a number of characteristic features which distinguish them from the usual subcritical and supercritical flows with smooth or slowly varied movement. Such properties include the wave-like or roller nature of free-surface curves, the presence of a streamline inclination and curvature, and also a non-hydrostatic pressure distribution in depth mainly in the vertical cross-section of these phenomena. Therefore, during mathematical and numerical simulations at the designing stage of hydraulic structures it is necessary to take into account the additional parameters which characterise the particularities of near-critical flows. In cases in which these moments are neglected, there are many cases of accidents and damage being caused to structures which are operated in conditions of near-critical flow formation. An objective of this work is to provide a detailed analysis of the particularities of near-critical flows and show their negative consequences on hydraulic structures. The article presents the results of the mathematical and hydraulic simulation of wavelike near-critical flows and a comparison of the full-scale measurement and a mathematical model of translation waves.

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Section: Simulation Of Near-critical Flows 31 Hydraulic and Mathematmentioning

confidence: 99%

“…A comparison between the theoretical free-surface profile was conducted, which was calculated by equation system (1) and experimental data ( Fig. 2).…”

Section: Simulation Of Near-critical Flows 31 Hydraulic and Mathematmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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