Theoretical bases of hydraulic mixture in round cylindrical pipelines

Abstract

Hydro transport is characterized by the combined movement of liquid and solid particles, which in a mixture form two-phase or multiphase flows with different physical and mechanical properties. One of the main tasks of hydraulic transport is to study the throughput of pipelines, where taking into account the distribution of sediment concentration over the cross section of the pipeline formed under the influence of gravitational force is of great importance in describing the nature of the two-phase flow. Pressure-bearing suspended flows in hydro transport systems are usually characterized by high volumetric concentrations and a wide range of sizes and densities of solid particles that are part of hydraulic mixtures. The flows under consideration are more complex in their structure than turbulent flows of homogeneous liquids in pipes. Therefore, the methods for calculating these flows are much more complicated than the usual methods of hydraulics of pressure flows of homogeneous liquids. To develop scientif-ically based methods for calculating the parameters of the movement of hydraulic mixtures in pipes, widely used the averaged equations of the weighted flow and experimental data. When moving slurries through pipes, gravity plays a significant role. The article discusses the influence of gravity on the throughput of pressure systems with different slopes and obtains new dependences of the flow rate of turbid flow on the slope of the pressure pipe.

Calculation of filtration process in channels

“…Especially in PK-930 to PK-1040, the ground level is almost equal to the lower water level, and the volume of soil discharged in this part of the canal is greater than in other parts. The canal is trapezoidal in shape and changed its shape slightly as a result of a small sedimentation and erosion (Figure 3) [20,21,22]. This can be clearly seen in the line diagram of the project and actual scheme of the channel.…”

Groundwater Level Analyse In Urgench City With Using Modflow Modeling And Forecasting System

“…The program works accurately only when the data is entered in full. Therefore, the existing hydrogeological conditions require the development of a comprehensive database in the form of geographical information [13,14,15,16].…”

Modification of dispersion systems and its motion in cylindrical pipes

“…The hydraulic calculation of its parameters during hydrotransport is carried out as follows: the particle size distribution of solid particles, the length of the pipe L, the density of the solid particle, the density of water, the concentration of the solid particle C, the flow rate of the solid particle Q, the carrying capacity of the flow are determined. It is necessary to determine the flow rate of water capable of carrying out the flow rate of a given solid particle during hydrotransportation, as well as to determine the critical velocity of dispersed systems in the pipe, which can provide the volumetric flow rate in the critical mode of hydrotransportation [22][23][24]. Having determined the specific head loss in the pressure pipes, we will also reveal the given flow rate for modified dispersed systems and the required pressure for hydraulic transport:…”