Calculation of water hammer on the pressure pipeline of modernized irrigation pumping station

Kan, Eduard; Muratov, Ashirbek; Yusupov, Muzaffar; Ikramov, Nazir

doi:10.1088/1757-899x/1030/1/012127

Cited by 18 publications

(15 citation statements)

References 2 publications

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“…Taking into account the influence of secondary flows, assumptions were made based on the results of an experimental study of the flow in hydraulic structures of the PS and pumps [11,12]:…”

Section: Resultsmentioning

confidence: 99%

“…The use of the principle of dissipation made it possible to extend the regularities of dividing the flow into transit and vortex from hydraulic structures to the flow path of pumps; in this case, the pump runs at reduced flow. The design of the water supply structures is designed according to traditional layouts, which do not take into account the peculiarities of the hydraulic operating conditions of the water supply complex [10,11,12].…”

Section: Introductionmentioning

confidence: 99%

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Design aspects of operation of water supply facilities of pumping stations

et al. 2021

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The aim of the research is to identify the hydrodynamic regularities in the improvement of operating modes in the water supply structures of pumping stations with vertical vane pumps. The authors studied the conditions for supplying water to the pumping station and the flow path of the pumps of the OP2...OP10 type. The curvature of the flow jets causes the swirl of the flow in front of the impellers, directed counterclockwise for the units located to the left of the axis in the direction of the flow and clockwise - located to the right. With such a flow structure, in the most unfavorable hydraulic conditions there are pumps, the direction of rotation of the impellers of which coincides with the direction of the natural swirl of the flow. The nature of hydraulic losses in the impeller of an axial pump in a wide range of feed changes within (0.1...0.4) Qо has been established. When the direction of rotation of the vortex α coincides with the direction of rotation of the pump, the decrease in flow reaches 0.5 Q0 for OPV 10 pumps, and (0.6 ... 0.7) Q0 for OP2...OP6 pumps. Impellers of axial-flow pumps must be designed taking into account shear phenomena.

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“…Taking into account the influence of secondary flows, assumptions were made based on the results of an experimental study of the flow in hydraulic structures of the PS and pumps [11,12]:…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design aspects of operation of water supply facilities of pumping stations

et al. 2021

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“…We now move on to justify the shape of the working surfaces of the device cover covers. In solving this problem, we proceed from the condition that the time of interaction between the working surface of the cover and the parts of the mouth is minimal [20][21][22][23][24][25][26][27][28][29]. This is due to the fact that, firstly, the sheets are easily moved along the working surface, and secondly, the technological process is carried out with minimal energy consumption.…”

Section: Resultsmentioning

confidence: 99%

The forces acting on the teeth of catching machine

et al. 2021

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Republic of Uzbekistan, pumping stations are used in very difficult conditions. The presence of various particles and effluents in the water has a negative effect on the operating modes of the pumping equipment. Special grilles are installed to prevent the catching devices from entering the advance chamber of the pump station. The shape and length of the device covers are of great importance so that they are caught in front of the grilles and completely cover the accumulated debris. In the article, the laws of mechanics were used to determine the shape and size of the working device of the device for cleaning the effluent flowing into the pump station as water and accumulated in front of the grids. In doing so, the condition of ensuring complete removal of the leaks covered by the device was taken into account. It was argued that the angle γ between the working surfaces and velocities of the covers should be less than 90-φ over its entire working surface in order to fully cover the device shafts. It was found that when the working surface of the device is flat, the time of interaction with the catching device pieces is minimal. Studies and literature have shown that the angle of friction on the working surfaces of the device covers should be φ=20°, the angle between the working surface of the device cover and the rotational speed γ=70°.

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“…Under such conditions, the organization of rational leaching of the headwater is of paramount importance. [4,5,7,8,9,10,14] The department "Use of water energy and pumping stations" of the Tashkent Institute of Irrigation and Agricultural Mechanization Engineers purposefully deals with the issues of improving the efficiency of operation of hydraulic structures and equipment of hydropower facilities (pumping stations and hydroelectric power plants) [15,16,17,18,19]. This article proposes a method for calculating the duration of washing the headwater of Indian-type hydrosystems to improve the conditions for water intake into the supply channels of the hydroelectric power station.…”

Section: Introductionmentioning

confidence: 99%

The method of hydraulic flushing calculation of the reservoir of the "Indian type" hydrosystem

2021

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One of the main problems in the operation of hydrosystems for various purposes is the silting up of the reservoir. Silting up of a reservoir leads to a decrease in useful capacity. And, of course, the hydrosystem's facility will not be able to fully perform its functions. This issue is particularly relevant for territories located in the arid zone with transboundary rivers, whose water resources are used for industries with different types of water consumption (first of all, irrigation and energy). The most common type of cleaning of silted reservoirs currently used is hydraulic flushing. The advantages of this method are the simplicity of the technological process; the disadvantage is the large consumption of water for washing, which is especially important in conditions of constant shortage of water resources. A method for washing reservoirs of Indian-type hydrounits is proposed. The technique considers the characteristic design features of a particular hydroelectric complex, operating experience, and field research data (sediment characteristics). The proposed technique was applied at the Ravatkhodzha hydro complex.

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Calculation of water hammer on the pressure pipeline of modernized irrigation pumping station

Cited by 18 publications

References 2 publications

Design aspects of operation of water supply facilities of pumping stations

Design aspects of operation of water supply facilities of pumping stations

The forces acting on the teeth of catching machine

The method of hydraulic flushing calculation of the reservoir of the "Indian type" hydrosystem

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