The numerical research of the flow in the inlet of the high-head hydraulic turbine

Abstract

3D-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.

Control and Energy Models of Reversible Hydraulic Machines

“…Розглянутий вище математичний опис забезпечує гнучкий підхід в процесі чисельного моделювання при проектуванні ПЧ. Це виявляється як в можливості вибору ефективнішого опису, відповідного даному рівню проектування ПЧ, так і можливості поступового ускладнення ММ при переході від одного рівня проектування ПЧ до іншого [19,20]. Відзначимо також доцільність його використання для побудови оптимізаційних моделей.…”

Modern Software for the Numerical Study of Flow in Hydraulic Machines

“…The most popular and demanded programs on the market at the moment are SolidWorks, Autodesk Inventor, Kompas 3D, etc. [1][2][3][4][5][6][7][8][9][10][11].…”

Actual Status of CFD Software Complexes for Numerical Research of Spatial Flow in Hydraulic Machines

“…Наиболее популярными и востребованными программами на рынке на данный момент являются SolidWorks, Autodesk Inventor, Kompas 3D и др. [1][2][3][4][5][6][7][8][9][10][11].…”