Готові списки джерел за темами / Hydrodynamic pumping stations / Статті в журналах
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Статті в журналах з теми "Hydrodynamic pumping stations"

Автор: Grafiati
Опубліковано: 28 травня 2022
Оновлено: 31 липня 2025

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1

Yan, Peiru, Zhao Zhang, Xiaohui Lei, et al. "A Simple Method for the Control Time of a Pumping Station to Ensure a Stable Water Level Immediately Upstream of the Pumping Station under a Change of the Discharge in an Open Channel." Water 13, no. 3 (2021): 355. http://dx.doi.org/10.3390/w13030355.

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Анотація:
For an open channel with cascade pumping stations, the water level immediately upstream of the pumping station should be kept constant to ensure pumping stability and lining safety. In this study, a simple method was proposed to determine the control time of the pumping station to ensure a stable water level immediately upstream of the pumping station using reverse analysis. The variable discharge process and fixed water level were taken as the upstream and downstream boundaries of the one-dimensional open channel hydrodynamic model, and the discharge process of the pumping station was obtaine
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2

Shaazizov, Farrukh. "Assessment of units vibration state and water supply path of Amuzang-2 pumping station." E3S Web of Conferences 365 (2023): 03028. http://dx.doi.org/10.1051/e3sconf/202336503028.

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Анотація:
This article presents separate results of studies devoted to the study and analysis of vibrational phenomena occurring on pumping units and along the line of the pressure pipeline of the surveyed pumping stations, associated with flow pulsation in the water supply path and cavitation manifested on pumping units. As is known, the operation of pumps is accompanied by hydrodynamic oscillatory phenomena, which are expressed in the non-stationarity of the field of velocities and pressures of water at the outlet of the pump. This is especially typical for powerful centrifugal pumps with high volumet
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3

Jonkobilov, U., U. Rajabov, and S. Jonkobilov. "Hydraulic shock damper with and without diaphragm." IOP Conference Series: Earth and Environmental Science 1112, no. 1 (2022): 012133. http://dx.doi.org/10.1088/1755-1315/1112/1/012133.

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Анотація:
Abstract The article provides an analysis of scientific papers devoted to the study of hydraulic shock absorbers used in pumping stations with long pressure pipelines. The efficiency of pumping stations depends on ensuring trouble-free operation - the reliability of pressure-hydraulic systems. The reliability of pumping units and long pressure pipelines is ensured using the proposed designs of hydraulic shock absorbers. In the experimental study of hydraulic shock absorbers, modern scientific instruments were used. The authors of this work have developed a special pressure sensor to record cha
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4

Vissarionov, V. I., V. V. Elistratov, and M. M. Mukhammadiev. "Energy and hydrodynamic studies of turbine operating regimes of large pumping stations." Hydrotechnical Construction 23, no. 2 (1989): 84–87. http://dx.doi.org/10.1007/bf01427931.

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5

Zhang, Xiaowen, Fangping Tang, Yueting Chen, et al. "Experimental Study on the Internal Pressure Pulsation Characteristics of a Bidirectional Axial Flow Pump Operating in Forward and Reverse Directions." Machines 10, no. 3 (2022): 167. http://dx.doi.org/10.3390/machines10030167.

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Анотація:
A bidirectional axial flow pump can realize bidirectional pumping, which has a wide application prospect in coastal low-head pumping stations and water jet propulsion systems. In this paper, a typical bidirectional axial flow pump is taken as the research object, and the hydraulic model of the bidirectional axial flow pump is manufactured. The hydrodynamic characteristics of the bidirectional axial flow pump are tested on the high-precision hydraulic mechanical test bench, including the positive and negative directions. In the experiment, multiple pressure pulsation monitoring points were arra
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6

Nasyrova, Naira, Oleg Glovatsky, Rustam Ergashev, Jaloliddin Rashidov, and Boybek Kholbutaev. "Design aspects of operation of water supply facilities of pumping stations." E3S Web of Conferences 274 (2021): 03008. http://dx.doi.org/10.1051/e3sconf/202127403008.

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Анотація:
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 hydra
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7

Vorontsov, M. A., V. Yu Glazunov, A. S. Grachev, M. S. Mashtalir, S. A. Pospelov, and A. V. Chernyshev. "Analysis of methods for modeling operating modes of compressor equipment that ensures the operation of field low-temperature separation units." Herald of Dagestan State Technical University. Technical Sciences 50, no. 4 (2024): 6–16. http://dx.doi.org/10.21822/2073-6185-2023-50-4-6-16.

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Анотація:
Objective. A booster compressor station (BCS) is one of the key technological facilities necessary to ensure the effective operation of low-temperature separation technology for natural gas in field gas preparation systems for transportation. Ensuring promising operating modes of booster compressor stations with high efficiency is an urgent task. Method. One of the tools for solving this problem is mathematical modeling of the operating modes of centrifugal compressors (hereinafter - CPC), which are part of gas pumping units (GPU). The basis of the mathematical model is the gas dynamic charact
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8

Qin, Xinzhan, Yu Zhou, and Manchao He. "Experimental Study on Mechanical Properties and Acoustic Emission Characteristics of Water Bearing Sandstone under Stable Cyclic Loading and Unloading." Shock and Vibration 2020 (July 28, 2020): 1–15. http://dx.doi.org/10.1155/2020/9472656.

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Анотація:
Due to the adjustment of energy structure, a large number of coal mines are abandoned. Considering the environmental and economic effects, many experts proposed to use the abandoned mine cavern as the reservoir of the pumped storage power station. Furthermore, considering the long-term effects of repeated pumping and drainage and hydrodynamic pressure on the surrounding rock in coal mines, a large amount of sandstone was collected from the Ruineng coal mine in Yan’an city to carry out a series of laboratory tests. Through uniaxial compression testing of rock samples with different water conten
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9

Serediuk, M. D. "Peculiarities of the operation of the oil pipeline in the process of its cleaning from paraffin deposition." Journal of Achievements in Materials and Manufacturing Engineering 2, no. 106 (2021): 77–85. http://dx.doi.org/10.5604/01.3001.0015.2419.

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Анотація:
Purpose: Improving the technology of cleaning the inner surface of the main oil pipelines from paraffin deposition by specifying the hydrodynamic parameters of the movement of the cleaning device in the cavity of the pipeline, by more accurate prediction of the time of its approach to the final point of purification. Design/methodology/approach: Performing theoretical researches and application of mathematical modelling methods in order to establish the regularities of the cleaning device movement in the oil pipeline. Findings: Regularities of changes in the capacity of the pipeline, the speed
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10

Savin, Maksim, Mikhail Oshivalov, Evgenii Vakhrameev, and Konstantin Galiagin. "The numerical modelling of the ejector pump working process with variable geometry of the flow channel." Applied Mathematics and Control Sciences, no. 3 (November 10, 2023): 8–21. http://dx.doi.org/10.15593/2499-9873/2023.3.01.

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Анотація:
The range of application of the ejector pumps for industry is extensive. The ejector pumps are used for gas, liquid and the multicomponent or multiphase mixtures transport. The stream-flow devices (pumps, compressors) has several advantages, for example: simple design, schema without moving parts, high reliability. Possibility of working with multiphase mixtures for ejectors determines their usage in the oil and gas mining systems as part of pumping stations for oil and gas pipe transport. Hydrodynamic of the stream-flow devices, which are used for oil and gas pipe transport, was researched go
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11

Wang, Zongzhi, Kun Wang, Kelin Liu, Liang Cheng, Lihui Wang, and Ailing Ye. "Interactions between Lake-Level Fluctuations and Waterlogging Disasters around a Large-Scale Shallow Lake: An Empirical Analysis from China." Water 11, no. 2 (2019): 318. http://dx.doi.org/10.3390/w11020318.

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Анотація:
Waterlogging disasters in the lakeside areas of shallow lakes that located in plain regions are sensitive to lake-level fluctuations. However, there are very few studies on the influences of lake-level fluctuations on waterlogged lakeside areas from a large lake basin perspective. This paper proposes an integrated hydrodynamic model employing the MIKE software to contribute to the existing literature by filling the gap constituted by the lack of an estimation of the impacts of lake-level fluctuations on waterlogging disasters by relevant models. First, a coupled one-dimensional and two-dimensi
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12

Ulm, Marius, Arne Arns, and Jürgen Jensen. "BLACK SWANS AND RISK - ASSESSING CONSEQUENCES OF EXTREME EVENTS FOR THE GERMAN BIGHT." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 103. http://dx.doi.org/10.9753/icce.v36.risk.103.

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Анотація:
Westerly and north-westerly storms regularly hit the German North Sea coast causing surges of several meters at the dikes. But extreme events like cyclone Xaver in 2013 are not the largest physically possible events on record. Dangendorf et al. (2016) show that the individual components of the total water level (i.e. mean sea level, surge, and tide) were not at their observed maximum during Xaver. The research project “EXTREMENESS” was initiated to examine the meteorological potential of storms in the German Bight and to assess the consequences of extremely large and rare but physically po
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13

Shokirov, B., B. Norkulov, Kh Nishanbaev, M. Khurazbaev, and B. Nazarov. "Computer simulation of channel processes." E3S Web of Conferences 97 (2019): 05012. http://dx.doi.org/10.1051/e3sconf/20199705012.

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Анотація:
The article discusses the results of numerical studies of flow movement with a sharp change in the channel parameters. The numerical study of the flow in the channels and rivers creates the possibility of a multivariate forecast of channel processes, rivers, and requires minimal expenditures. The purpose of the study is to determine the main objectives and directions of research in the area under consideration. A mathematical model and a computer program have been developed that allow solving a wide range of tasks for modelling currents in the channels of various difficulties, taking into acco
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14

Manzhay, Vladimir N. "Anti-turbulent efficiency of oil-soluble polymer solutions and colloid systems flowing through cylindrical channel." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 335, no. 7 (2024): 221–30. http://dx.doi.org/10.18799/24131830/2024/7/4378.

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Анотація:
Relevance. The use of anti-turbulent additives for transporting hydrocarbon liquids through main pipelines allows reducing significantly the energy consumption of pumping power stations. Aim. Comparative analysis of the anti-turbulent efficiency of high-molecular polymers and compositions of surfactants. Methods. Laboratory-scale experimentation aimed to study the flow of dilute polymer solutions and dispersed surfactant systems through a cylindrical channel of a turbulent rheometer. Results. The author has carried out the comparative experimental studies of the anti-turbulent efficiency of ex
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15

Serediuk, M. D. "MATHEMATICAL MODELING OF THE CHARACTERISTICS OF OIL PUMPS, TAKING INTO ACCOUNT THE VISCOSITY OF THE TRANSPORTED OIL." Oil and Gas Power Engineering, no. 1(31) (June 26, 2019): 54–64. http://dx.doi.org/10.31471/1993-9868-2019-1(31)-54-64.

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Анотація:
For solving a range of assignments concerning design and operation of main oil pipelines it is necessary to possess appropriate mathematical models of centrifugal pump characteristics as the pumps appear to be the main equipment of pumping stations. Known analytical dependences describe only operating envelope of the pumps and thus can`t be applied for low flowrate regimes being inherent to the Ukrainian oil transmission system. In addition, these mathematical models do not take into account the effect of the viscosity of the transported oil on the pressure and energy characteristics of oil pu
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16

Ye, Changliang, Yuan Zheng, Kan Kan, Ran Tao, and Huixiang Chen. "Advances in Hydrodynamics of Water Pump Station System." Water 16, no. 10 (2024): 1430. http://dx.doi.org/10.3390/w16101430.

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17

Манжай, Владимир Николаевич. "Degradation of antiturbulent properties of polymer solutions flowing in cylindrical channel." SCIENCE & TECHNOLOGIES OIL AND OIL PRODUCTS PIPELINE TRANSPORTATION 13, no. 4 (2024): 321–27. http://dx.doi.org/10.28999/2541-9595-2023-13-4-321-327.

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Анотація:
Рассмотрены две возможные причины деградации антитурбулентных свойств растворов полимеров в углеводородных средах. По одной из них уменьшение эффективности полимерных добавок при использовании их для снижения гидродинамического сопротивления турбулентного потока возникает вследствие деструкции полимерных цепей, сопровождающейся уменьшением молекулярной массы введенного образца полимера. Другая причина – инерционный (затянутый во времени) процесс растворения концентрированной присадки до состояния кинетически независимых макромолекулярных клубков с иммобилизованным растворителем в разбавленном
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18

Gustafsson, Lars-Göran, Doug J. Lumley, Claes Lindeborg, and Jan Haraldsson. "Integrating a Catchment Simulator into Wastewater Treatment Plant Operation." Water Science and Technology 28, no. 11-12 (1993): 45–54. http://dx.doi.org/10.2166/wst.1993.0645.

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A catchment model which describes the hydrological and hydrodynamic processes in the catchment to the Rya wastewater treatment plant in Göteborg, Sweden is presented. The model uses hydrological models (MouseNAM) of 20 subcatchments and a hydrodynamic model (MousePIPE) of the tunnel system to make flow and CSO predictions. The catchment model has been used to evaluate several different operating strategies of the plant's pumping station and will be implemented as an operating tool. Efforts are under way to establish hydraulic and mass transport models for the pumping station and primary settli
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19

Han, Song, Xinyan Yu, Wei Zhang, Guoqing Sang, Yuyu Liu, and Shiguo Xu. "Rationality Research on Pumping Station Location Based on MIKE Model: A Case Study of the Wanfu River Re-Navigation Project." Water 15, no. 24 (2023): 4207. http://dx.doi.org/10.3390/w15244207.

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Анотація:
The site selection of hydraulic structures is crucial to the successful implementation of water conservancy projects. Reasonable or not, site selection has a direct impact on the functioning of hydraulic structures, engineering safety, and environmental impact. In this paper, the proposed Wanfu River Guanqiao Ship Lock and Pumping Station engineering is utilised as the object. The MIKE model is executed to simulate both the impact of Guanqiao Ship Lock operation on the water quality of the pumping station intake as well as the effects of pumping station operation on the navigable water level i
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20

Bajic, Dragoljub, and Dusan Polomcic. "Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station "Bezdan 1", Serbia." Annales g?ologiques de la Peninsule balkanique, no. 75 (2014): 103–10. http://dx.doi.org/10.2298/gabp1475103b.

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Анотація:
A groundwater control system was designed to lower the water table and allow the pumping station ?Bezdan 1? to be built. Based on a hydrodynamic analysis that suggested three alternative solutions, multicriteria optimization was applied to select the best alternative. The fuzzy analytic hierarchy process method was used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selection of the best alternative, as well as fuzzy optimization calculations, yielded the ?weights? of the alternatives and the best alternative was selected for groundwater control at
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21

Cui, Yuna, Yufeng Sun, Jinxin Wu, and Li Cheng. "Analysis of diversion ratio and study of sediment transport in the first canal station of an irrigation area based on Mike21 hydrodynamic model." Journal of Physics: Conference Series 2854, no. 1 (2024): 012042. http://dx.doi.org/10.1088/1742-6596/2854/1/012042.

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Анотація:
Abstract Based on MIKE21 hydrodynamic model, the change of diversion ratio and sediment transport at the first canal station in an irrigation area are analyzed. Two-dimensional numerical simulation is carried out by using MIKE21 FM hydrodynamic module, and the split ratio is studied. In the aspect of sediment transport, the transport path and deposition distribution of different sediment particle sizes are simulated by simulating sediment transport. The results show that under the lowest daily average water level, the diversion canal flow can meet the irrigation demand; The particle size of se
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22

Reshetov, V. M. "INVESTIGATION OF SCHEMES FOR HYDRODYNAMIC CLEANING OF UNITS OF HYDRO-FUEL SYSTEMS." Journal of Dynamics and Vibroacoustics 8, no. 2 (2022): 20–26. http://dx.doi.org/10.18287/2409-4579-2022-8-2-20-26.

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Анотація:
The paper considers the structure of stands for hydrodynamic cleaning of units in order to ensure optimal cleaning parameters and protection of the pumping station, the features of parallel and series connection of a source of fluid oscillations when creating a pulsating pressure and flow in the cavity of the cleaned hydraulic unit. When calculating the modes of hydrodynamic cleaning of the cavities of the unit in resonant modes, electrodynamic analogies are used. The conducted experimental studies have confirmed the high efficiency of the purification process.
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23

ELANTSEVA, L. A., S. V. FOMENKO, and A. YU AFANASIEV. "THE INFLUENCE OF WETTING OF SUBSIDING SOILS TO THE BEARING CAPACITY OF FOUNDATIONS DURING THE TAILING DUMP HEIGHTENING AT THE KATOKA MINING COMPANY." News of the Tula state university. Sciences of Earth 2, no. 1 (2023): 157–64. http://dx.doi.org/10.46689/2218-5194-2023-2-1-157-164.

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Анотація:
It was revealed that light loams of Kalahari group have subsidence properties on the territory at the concentrating mill. A numerical filtration model has been developed to predict the hydrodynamic regime of groundwater under the conditions of tailing dump exploitation during its heightening. An increase of groundwater levels at the area of the pumping station has been established when the flow is backed up by technical waters of the tailing dump during its filling. The calculation of compressible strata depth under buildings was carried out. The calculation of soil subsidence value at the bas
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24

van Esch, B. P. M., and I. L. Y. Spierts. "Validation of a model to predict fish passage mortality in pumping stations." Canadian Journal of Fisheries and Aquatic Sciences 71, no. 12 (2014): 1910–23. http://dx.doi.org/10.1139/cjfas-2014-0035.

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Анотація:
A total of 1253 live cyprinids and eel were exposed to a centrifugal pump to study fish damage rates in a wide operating range. The observed types of injuries were consistent with a mechanical cause of damage. The measured mortality rates for cyprinids show a fair agreement with a blade strike model based on empirical data by Electric Power Research Institute. Analysis of the experiments with eel led to a new correlation for the blade mortality ratio for this species; lethal injury rate is shown to be zero up to a strike velocity of 8 m·s–1 and increases linearly to 42% for a strike velocity o
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25

Polomčić, Dušan M., and Dragoljub I. Bajić. "Application of the hydrodynamic predictive modeling on the example of the pumping station 'Bezdan 1'." Tehnika 69, no. 6 (2014): 960–66. http://dx.doi.org/10.5937/tehnika1406960p.

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26

Lei, Xiaohui, Yu Tian, Zhao Zhang, Lingling Wang, Xiaohua Xiang, and Hao Wang. "Correction of pumping station parameters in a one-dimensional hydrodynamic model using the Ensemble Kalman filter." Journal of Hydrology 568 (January 2019): 108–18. http://dx.doi.org/10.1016/j.jhydrol.2018.10.062.

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27

Nurmukhametov, Arthur I., Anton A. Nazarov, and Arnold Sh Bicbulatov. "Research and modeling of the hydrodynamic characteristics of the modified valve." Butlerov Communications 58, no. 4 (2019): 133–39. http://dx.doi.org/10.37952/roi-jbc-01/19-58-4-133.

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Анотація:
A modification of the gate valve with the added throttle valve as a second stage of controlling the flow of water to install it at the mouth of the injection well. An experimental study of the hydrodynamic characteristics of a gate valve with a butterfly valve at the mouth of an injection well at a cluster pumping station under various operating modes of the valve by replacing built-in fittings and inlet pressure has been carried out. The study showed the effectiveness of the added valve in the design of the valve, the valve will minimize unproductive injection of water into injection wells an
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28

Григорьева, А. Н. "Study of the optimal mode of sludge agitation in the receiving tank of a wastewater pumping station." Vodosnabzhenie i sanitarnaia tehnika, no. 7 (July 17, 2023): 53–59. http://dx.doi.org/10.35776/vst.2023.07.06.

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Анотація:
Взмучивание осадка в приемном резервуаре канализационной насосной станции является достаточно серьезной проблемой из-за большого риска выхода из строя насосного оборудования, а также слеживания и загнивания осадка в самом резервуаре. Как правило, методы борьбы с оседанием осадка направлены на освобождение только области вблизи всасывающих патрубков насосов. В остальной же части резервуара слежавшийся осадок периодически вымывают вручную в периоды технического обслуживания или минимального заполнения. Приводится сравнение двух методов взмучивания осадка в приемном резервуаре канализационной нас
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29

Glovatskii, Oleg, Rustam Ergashev, Naira Nasirova, Jaloliddin Rashidov, and Boybek Kholbutaev. "Experimental tests of submersible vane pumps." E3S Web of Conferences 401 (2023): 05065. http://dx.doi.org/10.1051/e3sconf/202340105065.

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Анотація:
The technical task of creating new designs of submersible vane pumps is to maintain stable operating parameters and increase the productivity of the pumping station with periodic regeneration and sediment removal. The pumping well station contains an outer chamber and an inner chamber, in which a pumping unit is installed, and pipelines are connected to the lower and upper pools. In the structure under study, the upper parts of the outer and inner chambers are equipped with a sealed head, and the lower part of the outer chamber is equipped with a stopper. The side surface of the inner chamber
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30

Cui, Yunsong, Qiuhua Liang, Yan Xiong, Gang Wang, Tianwen Wang, and Huili Chen. "Assessment of Object-Level Flood Impact in an Urbanized Area Considering Operation of Hydraulic Structures." Sustainability 15, no. 5 (2023): 4589. http://dx.doi.org/10.3390/su15054589.

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Анотація:
Urban flooding has become one of the most common natural hazards threatening people’s lives and assets globally due to climate change and rapid urbanization. Hydraulic structures, e.g., sluicegates and pumping stations, can directly influence flooding processes and should be represented in flood modeling and risk assessment. This study aims to present a robust numerical model by incorporating a hydraulic structure simulation module to accurately predict the highly transient flood hydrodynamics interrupted by the operation of hydraulic structures to support object-level risk assessment. Source-
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31

Tong, Zheming, Zhongqin Yang, Qing Huang, and Qiang Yao. "Numerical Modeling of the Hydrodynamic Performance of Slanted Axial-Flow Urban Drainage Pumps at Shut-Off Condition." Energies 15, no. 5 (2022): 1905. http://dx.doi.org/10.3390/en15051905.

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Анотація:
Increasing extreme rainfall events caused by global climate change have had a significant impact on urban drainage systems. As a critical component of a pumping station, a large-scale slanted axial-flow pump (SAFP) featuring high specific speed plays a critical role in mitigating urban flooding and waterlogging. In this study, to reveal the transient characteristics of a SAFP at shut-off conditions, a computational fluid dynamics (CFD) based approach with dynamic mesh was proposed. Multiple shut-off conditions with various shut-down speeds of the sluice gate (SG) were modeled. Our analysis dem
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32

Poulain, Angélique, Estanislao Pujades, and Pascal Goderniaux. "Hydrodynamical and Hydrochemical Assessment of Pumped-Storage Hydropower (PSH) Using an Open Pit: The Case of Obourg Chalk Quarry in Belgium." Applied Sciences 11, no. 11 (2021): 4913. http://dx.doi.org/10.3390/app11114913.

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Анотація:
Pumped storage hydropower (PSH) enables the temporary storage of energy, including from intermittent renewable sources, and provides answers to the difficulties related to the mismatch between supply and demand of electrical energy over time. Implementing a PSH station requires two reservoirs at different elevations and with large volumes of water. The idea of using old, flooded open-pit quarries as a lower reservoir has recently emerged. However, quarries cannot be considered as impervious reservoirs, and they are connected to the surrounding aquifers. As a result, PSH activities may entail e
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33

Savinykh, P. A., and V. A. Kazakov. "DEVELOPMENT OF A GRAIN MOLASSES INSTALLATION’S PRODUCING AND ITS TECHNOLOGICAL PARAMETERS RESEARCHING." Техника и технологии в животноводстве 14, no. 4 (2024): 57–63. https://doi.org/10.22314/27132064-2024-14-4-57.

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Анотація:
To eliminate imbalance feed sugars’ losses of liquid grain molasses for cattle using at their preparation by the technology and technical means it need allows to convert the grain by fermentation starch hydrolysis by into simple sugars. There in the FANC of the Northeast, research has been conducted on the technologies and technical means’ development for molasses’s producing from cereals improvement and application the results of molasses production process’s effectiveness and technological reliability with its installation’s increase ensuring, energy intensity so and producing costs in 12-15
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34

Martini, Marco, Karl J. J. Mayrhofer, and Marco Bonanno. "Towards an Elevated Temperature and Pressure 3-Electrode Hydrodynamic Channel Flow Cell." ECS Meeting Abstracts MA2025-01, no. 57 (2025): 2766. https://doi.org/10.1149/ma2025-01572766mtgabs.

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Анотація:
The screening of electrocatalysts for energy conversion devices such as fuel cells and electrolyzers is usually conducted on a small scale in 3-electrode setups operated at room temperature and atmospheric pressure, e.g. the well-established Rotating-Disk Electrode (RDE). However, at the industrial level, electrochemical processes are frequently more efficient and economically viable when conducted at higher temperatures, thanks to better kinetics, lower overpotentials and the possible valorization of the waste heat. Advanced setups are hence required to study the performance of electrocatalys
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35

Arfib, Bruno, Ghislain de Marsily, and Jacques Ganoulis. "Coastal karst springs in the Mediterranean basin : study of the mechanisms of saline pollution at the Almyros spring (Crete), observations and modelling." Bulletin de la Société Géologique de France 173, no. 3 (2002): 245–53. http://dx.doi.org/10.2113/173.3.245.

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Анотація:
Abstract Variations in salinity and flow rate in the aerial, naturally salty spring of Almyros of Heraklion on Crete were monitored during two hydrological cycles. We describe the functioning of the coastal karstic system of the Almyros and show the influence of the duality of the flow in the karst (conduits and fractured matrix) on the quality of the water resource in the coastal area. A mechanism of saltwater intrusion into this highly heterogeneous system is proposed and validated with a hydraulic mathematical model, which describes the observations remarkably well. Introduction. – Fresh gr
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36

Arifjanov, Aybek, Alimardon Sattorov, Murodil Madaliyev, Zokhidjon Abdulkhaev, and Mamadali Madrakhimov. "Numerical simulation of the flow rectification measures in the forebay of the pumping station." Acta hydrotechnica, May 5, 2025, 1–14. https://doi.org/10.15292/acta.hydro.2025.01.

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Анотація:
The kinematics of flow movement in the forebays of pumping stations significantly influence the efficiency of pump operation. This study addresses the issue of sediment accumulation caused by improper flow velocity distribution in the intake structures of pumping stations. Research was conducted at the water intake structure of Uzbekistan’s Dehqonobod pumping station, located in Quva district, Fergana region. The study involved analyzing hydrodynamic processes within the intake structure based on the principles of fluid motion, combining experimental approaches with simulations using the COMSO
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37

Li, Xuan, Shuhong Xue, Jingming Hou, et al. "Hydrodynamic model-driven evolutionary algorithm-based operation optimization of an experimental drainage pumping station." Journal of Water and Climate Change, October 23, 2024. http://dx.doi.org/10.2166/wcc.2024.405.

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Анотація:
ABSTRACT The effective operation of pumping stations plays a crucial role in urban flood management. However, challenges persist in optimizing pumping station operations, including inaccuracies in characterizing flood propagation and the high computational costs associated with optimization. This study introduces a novel optimization approach for pumping station operation that integrates a hydrodynamic model with evolutionary algorithms, leveraging data-driven technology. The method iteratively computes operation rules using the adaptive particle swarm optimization (APSO) algorithm to identify
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38

Luo, Can, Kang Du, Weijun Qi, Li Cheng, Xianbei Huang, and Jiaxing Lu. "Investigation on the Effect of the Shaft Transition Form on the Inflow Pattern and Hydrodynamic Characteristics of the Pre-Shaft Tubular Pump Device." Frontiers in Energy Research 10 (July 22, 2022). http://dx.doi.org/10.3389/fenrg.2022.955492.

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Анотація:
The shaft tubular pump device is widely used in low head pumping stations in plain areas. The N-S equation and the SST k-ω turbulence model are adopted. Then, the investigation on the influence of the shaft transition form on the inflow pattern and hydrodynamic characteristics of the pre-shaft tubular pump device is carried out. By designing three transition forms of shafts, different inflow patterns are provided for the tubular pump device. The characteristic parameters of the shafts and external and internal flow characteristics of the pumping device under different inflow patterns are compa
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39

Hu, Chongyang, Xiaowen Zhang, Wenzhong Shen, Haiyu Liu, Fangping Tang, and Bipeng Yan. "Study on pressure field characteristics of high specific speed axial flow pump under full working conditions based on wavelet transform." Physics of Fluids 37, no. 2 (2025). https://doi.org/10.1063/5.0253920.

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Анотація:
Axial flow pumps are widely used in ship jet propulsion units and coastal plain pumping stations. In the actual operation process, axial flow pumps need to operate in extreme working conditions, in order to explore the safety and stability of axial flow pumps operating under special working conditions, this paper adopts a method that combines model experiment and numerical simulation. A full-condition model experiment of the axial flow pump section (AFPS) is carried out on the high-precision axial flow pump system test platform. Meanwhile, a simulation model predicting the full characteristics
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40

"Hydrodynamic features of the floating water outlet from a pumping station." Journal of Water and Land Development, November 6, 2023. http://dx.doi.org/10.24425/jwld.2021.136159.

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41

Wang, Hua, Zhiqi Liu, Xiangyu Feng, Weihao Yuan, and Yichuan Zeng. "Nutrient's response to water transfer in an urban river-network." Water Supply, June 12, 2021. http://dx.doi.org/10.2166/ws.2021.182.

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Анотація:
Abstract Through water transfer, the hydrodynamic conditions of the river network can be improved, and the biochemical degradation of pollutants can be promoted, but at the same time, the endogenous release may be intensified. It is therefore possible to subdivide the response of nutrient content to water transfer into three components: (a) Direct Impact (DI) of dilution through water diversion, (b) Indirect Impact (II) by sediment release, and (c) Self Impact (SI) of nutrient degradation and attenuation of nutrients. By combining field investigation, laboratory experiment, and numerical simul
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42

Wang, Haidong, Dong Xu, Changfeng Ding, Qihua Ran, Saiyu Yuan, and Hongwu Tang. "Numerical and experimental study on water-sediment flow in a lateral pumping station forebay." Physics of Fluids 36, no. 9 (2024). http://dx.doi.org/10.1063/5.0229729.

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Анотація:
Multiple vortex flow patterns are commonly observed in lateral pumping station forebays, particularly in basins with high sediment concentrations. These patterns can lead to pump blockage, sediment deposition, and other issues that disrupt pump station operations. The water-sediment two-phase flow in lateral pumping station forebays is significantly influenced by the start-up combination, yet our understanding remains limited. To address this, the mixture multiphase flow theory is introduced to describe water-sediment dynamics, and the mathematical model is validated with experimental data. By
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43

Xiuli, Wang, Lin Bin, Li Yang, et al. "Hydraulic Optimization of Two-Way Counter-rotating Axial Flow Pump Turbine." Frontiers in Energy Research 8 (November 23, 2020). http://dx.doi.org/10.3389/fenrg.2020.577232.

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Анотація:
The two-way counter-rotation technology is mainly applied to the tidal power station. In this paper, the hydrodynamic optimization of the two-way counter-rotating axial-flow pump turbine is carried out. Under the premise of realizing the forward and reverse power generation and the forward and negative pumping basic function, it has important engineering significance and academic value for improving the pump turbine performance of various working conditions. The main contents are as follows: hydraulic design of “S”-shaped blade for the two-way counter-rotating axial-flow pump turbine is conduc
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44

Serediuk, M. D., and S. V. Velykyi. "Calculation of mixing parameters during sequential transportation of natural gas and hydrogen by pipeline." Journal of Achievements in Materials and Manufacturing Engineering 125, no. 1 (2024). http://dx.doi.org/10.5604/01.3001.0054.8677.

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Анотація:
To determine the effect of hydrogen concentration in the gas-hydrogen mixture on the throughput capacity of the main gas pipeline and the volume of energy transported by it. The range of molar concentrations of hydrogen in the gas-hydrogen mixture up to and including 20%, which does not require significant technical modernisation of the system, was investigated.Performing theoretical studies and applying mathematical modelling methods to establish the regularities of thermo hydrodynamic processes in a gas pipeline, gas turbine and centrifugal blowers while transporting gas-hydrogen mixtures.In
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45

Serediuk, M. D., and S. Y. Hryhorskyi. "The throughput capacity of the main gas pipeline when transporting gas-hydrogen mixtures." Journal of Achievements in Materials and Manufacturing Engineering 123, no. 1 (2024). http://dx.doi.org/10.5604/01.3001.0054.6976.

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Анотація:
To determine the effect of hydrogen concentration in the gas-hydrogen mixture on the throughput capacity of the main gas pipeline and the volume of energy transported by it. The range of molar concentrations of hydrogen in the gas-hydrogen mixture up to and including 20%, which does not require significant technical modernisation of the system, was investigated.Performing theoretical studies and applying mathematical modelling methods to establish the regularities of thermo hydrodynamic processes in a gas pipeline, gas turbine and centrifugal blowers while transporting gas-hydrogen mixtures.In
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