2017
Постійне посилання на розділhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/28160
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Документ To the question of increasing the pilot performance of the stage of the submersible centrifugal pump at the production of oil and gas production(NTU "KhPI", 2017) Shudryk, A. L.; Koval, E. S.; Doroshenko, Aleksandr VladislavovichA review of existing designs of stages of submersible centrifugal pumps, research and ways to increase of head. The main causes of energy losses in the flow parts of pumps of the ESP type are described. A numerical model for simulating multiphase flows has been determined. Numerical simulation of the flow of GLM is carried out. The ways of increasing the assertiveness are determined. The values of the head in the moving and stationary elements of the flow part are obtained. headlosses in submersible centrifugal pumps are analyzed. A modified flow part is proposed, which allows to reduce hydraulic losses and increase the power of the entire stage as a whole. The calculation of the modified step is carried out. The flow of the gas-liquid mixture in the modified stage is visualized. The pressure and energy characteristics of the new stage are obtained. The distribution of static pressure along the blade is shown for different gas contents.Документ The numerical research of the flow in the inlet of the highhead hydraulic turbine(НТУ "ХПІ", 2017) Rezvaya, Kseniya Sergeevna; Krupa, Evgeniy Sergeevich; Drankovskiy, Viktor Eduardovich; Potetenko, Oleg Vasilyevich; Tynyanova, Irina Ivanovna3D-methods for the calculation of flow are used in this work. The solid model of the inlet is created. The mesh of the tetrahedral type is constructed. The boundary conditions for the calculations in the program are given, namely: the rate in inlet of the spiral casing and pressure on an exit. The choice of the turbulence model was based on the tasks that were set earlier. The results of numerical research of three-dimensional flow of a fluid flow in the high-head radial-axial hydraulic turbine are presented. Calculations are conducted for prognostication of descriptions and optimization of form of water passage of hydraulic turbines. The calculation of coefficient of losses of kinetic energy in the elements of inlet of hydraulic turbine is conducted. The total energy losses in the inlet of the water passage using different applied program packages are determined. The comparison of the data, which was obtained by in the calculations and the experimental data, is produced. The distributions of the total pressure and static pressure are presented in this paper. The velocity distribution in the meridional sections is presented. The complex nature of fluid flow is described. The secondary fluid flow in the spiral casing of the hydraulic turbine is confirmed by calculations. This secondary motion in the spiral casing of the hydraulic turbine appears due to the complexity of the fluid flow. Conclusions about the results of the three-dimensional calculations are made. Using special programs in the design of hydraulic turbines can reduce the technological resources and time.