Influence of the Roughness and Shape of the Canal of Trapezoidal Canals on the Pressure Loss of Hydropower Structures

Uralov, Bakhtiyor; Khidirov, Sanatjon; Artykbekova, Fotima; Shodiev, Bobur

doi:10.1007/978-3-030-67654-4_5

Cited by 3 publications

(4 citation statements)

References 15 publications

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“… the water level oscillations when the bays are connected in the form of external hydraulic jumps are much higher than when connected to the bottom of the basin, resulting in reduced energy production efficiency in hydropower plants and increased coastal washing intensity in the lower bays;  the efficiency of power extinguishers built in the lower reaches of the drainage system is low, and the implementation of external connection in the form of external hydraulic jumps reduces the operating mode and does not give the expected result in operation [5][6][7][8].…”

Section: Resultsmentioning

confidence: 99%

“…At present, it is especially important to conduct targeted research aimed at the development of scientifically based calculation methods for quenching the kinetic energy of water flow in water discharge facilities, the selection of flow energy quenching structures, the elimination of water flow inversion [1][2][3][4][5][6]. In this regard, it is important to determine the relative magnitudes of the calculated dynamics of the critical parameters of the flow in the drainage facilities, the location of water flow energy extinguishers, and the development of design solutions.…”

Section: Introductionmentioning

confidence: 99%

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Exploration of the hydraulic structure of the water supply facilities operation mode and flow

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For multi-section drainage facilities, it is important to develop operational measures based on maneuvering moving barriers. Maneuvering of moving barriers is a measure that carries out the flow of water from the upper reaches to the lower reaches at the required level, taking into accounts the design features and operational mode of the hydraulic regime of the drainage structure. The maneuvering mode in the flow of water from the discharge structures ensures the order of opening, phasing, and level of opening of these movable barriers. Hydraulic conditions are associated with the effective control of the hydraulic regime in the lower part of the drainage structure or the suppression of excess kinetic energy, the reversal of the flow, or the prevention of post-riser deformation processes. Creating conditions ensuring that the hydrotechnical and hydropower construction of the water transfer or discharge facility is adapted for use in conjunction with a hydropower plant, water intake, sluices, and flow control system.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploration of the hydraulic structure of the water supply facilities operation mode and flow

et al. 2021

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“…Until recently, it was believed that in free-flow derivation channels with a «correct» cross-sectional shape, its influence on the value of pressure losses can always be estimated with an acceptable approximation using the hydraulic radius. However, this position is not always ensured in the case of channels with a «correct» shape, cross-section [1][2][3][4][5][6][7][8]. The authors indicated in the literature have shown that for free-flow channels with a «correct» cross-sectional shape, the hydraulic radius as a parameter that must take into account its effect on the value of pressure losses in these channels is insufficient.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic resistances of derivation channels of hydropower facilities

et al. 2021

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Currently, many authors have studied the uniform axisymmetric pressure head laminar and turbulent movement of water in hydraulic smooth and rough (with uniform roughness) pipes of circular cross-section. The results obtained in the study of a plane-parallel turbulent flow in pressure channels allow here only to outline the structure of the corresponding dependencies and to clarify the simplest case of unpressurized fluid movement, when this movement can also be reduced to plane-parallel or, in other words, to movement in channel of infinitely large width with a flat bottom. In all other cases, the only way to solve the problem is experiment. But the possibilities of the experiment are limited, as are limited, and in a number of cases debatable, and the information accumulated to date on the uniform free-flow motion of fluid in channels of various cross-sectional shapes. The unpressurized uniform movement of fluid in channels of various cross-sectional shapes has been completely insufficiently studied. The construction of numerous free-flow watercourses, as well as machine channels of pumping stations, requires scientifically based calculation methods. For the correct establishment of hydraulic calculation methods, a sufficiently deep study of the physical essence of the phenomena occurring in the free-flow derivation channels is necessary. The extensive construction of numerous free-flow watercourses, as well as hydroelectric power plant (HPP) derivation channels, requires scientifically based calculation methods. For the correct establishment of hydraulic calculation methods, a sufficiently deep study of the physical essence of the hydraulic phenomena occurring in the free-flow derivation channels of HPPs is necessary.

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“…As a result, the effect of these power switches on the flow simplifies the construction of the structure, increases the level of operational reliability of the structure, along with improving the hydraulic conditions of the discharge or discharge of water flow into the lower basin [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Hydraulic regimes and hydrostatic pressure of the flow on the elements of fastenings of the downstream of water outlets

et al. 2021

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A comprehensive study of the flow of water plays an important role in the design of the area of the lower reaches of the drainage and drainage structures of hydraulic structures. In particular, the complex processes associated with the flow movement in the lower reaches of low and medium pressure reservoirs play an important role in the selection of the appearance of the structure, structural elements and their shapes, sizes and location conditions. One of the important issues is to assess the strength of the elements of the lower basins of water intake facilities and hydropower plants in the current reservoirs, to determine the mode of connection of the basins, to improve the methods of quenching kinetic energy in the reinforced areas of the lower basin. Based on the 2 schemes adopted in this article, the hydrostatic pressures of several types of power extinguishers installed in the area of the water injection well, providing the bottom pound strength, were determined for the experimental device.

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Influence of the Roughness and Shape of the Canal of Trapezoidal Canals on the Pressure Loss of Hydropower Structures

Cited by 3 publications

References 15 publications

Exploration of the hydraulic structure of the water supply facilities operation mode and flow

Exploration of the hydraulic structure of the water supply facilities operation mode and flow

Hydraulic resistances of derivation channels of hydropower facilities

Hydraulic regimes and hydrostatic pressure of the flow on the elements of fastenings of the downstream of water outlets

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