Analytical substantiation of the parameters of the directional air-hydraulic hood

In the present era, when climate change has become a global problem, efficient use of water resources is becoming an important task. Natural field research was conducted in Chartak reservoir. In order to determine the amount of turbidity entering with the flow, the characteristic tributaries were determined along the length of the reservoir, and in each tributary, samples were taken using a bathometer at different times of the season and filtered in laboratory conditions. According to the analysis of the results, the average amount of incoming turbidity was 0.3-0.5 g/l, and the amount of outgoing turbidity was 0.05-0.08 g/l. Samples of the sediments that sank into the reservoir bowl were taken and their fractional and chemical composition was analyzed in the laboratory of “Gidroproekt” JSC. According to the fractional composition of muddy sediments, particles with a diameter of 1.0-0.5 mm are 13.98%, particles with a diameter of 0.5-0.25 mm are 11, 49%, particles with a diameter of 0.25-0.10 mm - 7.56%, particles with a diameter of 0.10-0.05mm - 10.48%, particles with a diameter of 0.05-0.01 mm - 26.8%, it was found that particles with a diameter of 0.01-0.005 mm make up 13.34%, and particles with a diameter of 0.005-0.002 mm make up 16.42%. If we pay attention to the distribution and share of sediments on the walls, 35-40% of particles with a large fraction (d=1.0-0.1 mm) and 50-60% are particles with a small fraction (d=0.05-0.001mm). It is based on the presence of particles rich in microelements useful for agricultural fields in sediments. If we pay attention to the distribution and share of sediments on the walls, 35-40% of particles with a large fraction (d=1.0-0.1 mm) and 50-60% are particles with a small fraction (d=0.05-0.001mm). It is based on the presence of particles rich in microelements useful for agricultural fields in sediments. If we pay attention to the distribution and share of sediments on the walls, 35-40% of particles with a large fraction (d=1.0-0.1 mm) and 50-60% are particles with a small fraction (d=0.05-0.001mm). It is based on the presence of particles rich in microelements useful for agricultural fields in sediments.

Section: Resultsmentioning

confidence: 99%

Analysis of fractional and chemical composition of chartak reservoir sludge sediments

Xoshimov

Qosimov

Ortikov

et al. 2022

“…3.4). According to the calibration curves [6,7], the parameters of the steady motion of the liquid are determined: flow rate Q, velocity ϑ0, air volume W0 in the absorber at absolute pressure pga(Hga), absolute hydrodynamic pressure p0a(H0a) in the pressure pipe 7 (Fig. 1) and head loss hd0 in the connecting pipeline 8 (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…To experimentally verify the reliability of the existing method for calculating the absorber (cap) with a diaphragm and the eligibility of using this method to calculate the absorber without a diaphragm in order to verify the proposed calculation method, special studies were carried out in the laboratory of hydraulics of the Karshi Engineering and Economic Institute, the methodology for which is described [6,7]. The diagram of the pumping unit is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

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Hydraulic shock damper with and without diaphragm

Jonkobilov¹,

Rajabov

Jonkobilov

2022

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 changes in hydrodynamic pressure during hydraulic shock. The paper presents the results of experimental studies of hydraulic shock absorbers with and without a diaphragm. At the same time, a reliable agreement was obtained between the results of calculations of hydraulic shock absorbers with and without a diaphragm using the proposed method with experimental data. The performed research experiments prove that the damper with a diaphragm is a very effective and economical water hammer damper for long pressure pipelines of pumping stations with the values of the polytropic coefficient n=1.2. Calculations and experiments confirm that the proposed method for calculating an absorber with a diaphragm can be applied to calculate an absorber without a diaphragm.

“…When calculating the filtration from the dam of the structure, the water level values were obtained on the basis of a graph linking the water level and the volume of the reservoir [9,10]. Based on the initial calculations, the volume of filtration passing through the reservoir dam and under it was determined.…”

Section: Analysis and Resultsmentioning

confidence: 99%

Calculation of filtration in reservoirs

Apakhujaeva

Melikuziyev

Matkaziyev

et al. 2022

All Over the years, due to long-term operation, the useful volume of the reservoirs decreased. Accurate assessment of the useful volume of water reservoirs, development of specific measures to prevent water wastage is one of the important issues of today. On average, 20-30% of the water volume is lost from the reservoir in one year through filtration, which is one of the main factors affecting the water wastage of reservoirs. If water waste is not taken into account, if a special volume of water is not reserved, then consumers will not be able to get the amount of water intended for them (for production purposes). In this article, the method of calculating the volume of water lost to filtration from flow-through reservoirs is presented on the example of the Rezaksoy reservoir, and a new link on filtration calculation is proposed based on observational data obtained from field studies. The proposed calculation formula was compared with existing calculation formulas and with obtained data in natural field conditions.