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The article investigates the flow in flowing part of the high-pressure hydraulic turbine with radial-axial impeller. These studies relate to the study of the possibility of skipping idle costs through a pressure tract with stopped turbine wheel. In this case the flow of water passes through the guide vanes and a fixed array of impeller blades. For comparison, calculations are made for the same rotating impeller hydraulic turbine with a nominal (synchronous) frequency. This paper considers the nature of the fluid in the system blade impeller and the draft tube. The calculation is performed by a numerical method using finite-volume elements. Shows the distribution fluid pressure on the surfaces of the impeller blades, as well as the streamlines in a blade system and the exhaust pipe. The boundary conditions for calculating the flow in the exhaust pipe taken flow on the output of a blade of the impeller. Particular attention is paid to the formation of the harness in the cone of the draft tube on the mode with locked impeller. The comparison of experimental data obtained in the study of the characteristics of swirling flow in a cylindrical tube with the data obtained by calculation. The article assesses the dynamic effects on the hydraulic unit and elements of building construction. It is concluded that the frequency corresponds knotted speed swirling flow, which is a cylindrical annular flow.

Экспериментальное наблюдение явления перезамыкания прецессирующего вихревого жгута в турбине радиально-осевого типа