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We studied a scour in a drainage canal of the Cheboksary hydrosystem tailrace on the Volga river. To protect the hydrosystem tailrace from scouring, we proposed flexible stream-guiding grids that are installed in the stream and effectively affect its kinematics in the bottom area. We calculated in MathCad a system of vortices that occur when the flow runs against adjacent plates of a grid. Due to the replacement of flexible elements of a grid with flat plates that divide the flow into separate jets, it became poss...

Based on the analysis of contamination of hydrosystem headraces with floating materials, we developed a system of protective facilities, including protective booms, abutments and bottom mats, guiding booms. To justify the operation of the developed facilities, automated calculations of the listed guiding and retaining facilities were performed. The main attention was paid to the experimental study of the facilities. As a result of the experimental studies, we determined values of forces in a ground sill, depending...

Parameters of local scours in an unprotected part of the riverbed behind the hydrosystem end structures are determined by distribution of kinematic characteristics of the flow. The kinematic characteristics in cross-sections of a natural part of the riverbed depend on a number of factors, including the bottom roughness, flow depth and water surface slope. To calculate the velocity distribution over the cross-section of the drainage channel, we used Navier?Stokes equations for the uniform steady turbulent motion. W...

We studied the reasons of the formation of local scours in the Cheboksary hydrosystem tailrace on the Volga river. To determine the parameters of the scour basin, we calculated the spatial conjugation of the races in MathCad application software environment. The morphological analysis of soft shells allowed us to establish characteristics of mobile baffles required for protection of the hydrosystem tailraces from scouring. For the formation of an induced vortex flow directed opposite to the channel flow, we propos...

Calculation of the local scour behind the hydrosystem tailrace structures is associated with determination of hydraulic flow parameters, characterized by a sudden increase in the depth. The flow parameters are calculated on the basis of T. von Karman's integral momentum equation for a submerged turbulent jet. The flow in the hydrosystem tailrace, in accordance with the approach of G. N. Abramovich, is considered as a set of a submerged turbulent jet, a vortex area, and a main flow in the tailrace passage. It allow...

Parameters of local scours in an unprotected part of the riverbed behind the hydrosystem end structures are determined by distribution of kinematic characteristics of the flow. The kinematic characteristics in cross-sections of a natural part of the riverbed depend on a number of factors, including the bottom roughness, flow depth and water surface slope. To solve the problem of calculating the velocity distribution over the cross-section of the drainage channel, we used Navier - Stokes equations for the uniform s...