Influence of cavitation-hydro abrasive wear and wear of vane hydraulic machines on the hydraulic resistance of the suction line of pumping units

The article presents the results of numerical studies carried out by the authors of the existing problems in assessing the intensity of channel processes in the territory of the damless water intake of the Amudarya river. As well as the development of hydraulic regimes and flow regimes of sediment flow for the proposed structures based on experimental and numerical studies for the proposed structures is the main goal of research work. In the course of numerical studies, depths, changes in water flow were determined which elements of flow in straight and curvilinear channels were initially. As part of the numerical studies, the flow spreading conditions (vectors of medium-depth velocities) in specific time intervals and transitions in the water intake area were studied.

Section: Resultsmentioning

confidence: 99%

Calculation of planned flows taking into account deformations of bottom sediments in a dam-free water intake

Bazarov,

Norkulov,

Mamataliev

et al. 2023

Elements of technical water supply system of pumping units

Ergashev,

Rashidov,

Musaev

et al. 2023

The ongoing research aims to develop an optimal variant of the industrial water supply scheme, selected based on a comparison of several possible solutions. It is recommended to use a block-by-aggregate technical water supply system at stations equipped with any number of main units with a large flow of the main pumps, more than 5 m3/s. If there is a significant amount of sediment in the water at the stations, settling tanks are needed at the water intake devices of the technical water supply systems. Filling with water from pumps installed above the source level can be performed using vacuum pumps, ejectors, the self-suction method, using suction pipes with a raised elbow, or storage tanks. The authors investigated a new process water supply system for a large pumping station in Kiziltepa with control devices and a flow meter on the service water supply inlet pipeline. The calculation of the reliability of the operation of the described structures includes a new reliability criterion, which is taken as the turbidity of the flow at the outlet of the settler.

Improvement of water distribution management methods for operating modes of machine channels

Glovatskiy,

Djumanazarova,

Saparov

et al. 2023

The ongoing research aims to improve the reliability of irrigation systems, improve methods for managing the water distribution of the operating modes of machine canals, and increase crop yields in the Nukus and Kegeyli regions of the Republic of Karakalpakstan. At present, increasing the efficiency of the operation of machine channels is associated with the development of energy and resource-saving technologies. Pumps that have been in operation for more than 25-30 years, due to physical and obsolescence, operate with low efficiency, emergencies associated with technological regimes with transients. The article analyzes changes in the processes of the hydrodynamics of control systems with optimization of sediment control on water supply structures, the danger of abrasive wear of the flow path of hydraulic units, and experimentally checks the mathematical model for managing the water distribution of operating modes. In this regard, the improvement of the design of elements and the modernization of individual units of pumping units will increase the efficiency of the entire system of machine water lifting. Recommendations are given on the inclusion of settling tanks in the composition of the head waterworks, carrying a large number of suspended sediments (more than 0.2–0.5 kg/m3) and systems for their purification.