METHOD FOR CONTROLLING FLOW MODE IN AN OPEN CHANNEL Russian patent published in 2023 - IPC E02B13/00 

FIELD: hydraulic engineering.

SUBSTANCE: invention is related to devices for damping water flow in open channels. The method consists in forming a hydraulic flow structure in an open high-flow channel, including a tapering damping chamber 3 located between the inlet channel 1, an additional expanding damping chamber 5 in a short section and an outlet channel 2. The tapering chamber 3 without a bottom drop is equipped with vertical longitudinal walls 4. The expanding chamber 5 is made with a water overflow wall 7, curved in plan, with slots 8. The tapering chamber 3 is made of at least three spans. The water wall 7, curved laterally, is made of constant height. In this case, the expanding damping chamber 5 is interfaced with the outlet channel 2, in which a water overflow straight transverse threshold 9 is additionally positioned. The centre of curvature of the curvilinear water overflow wall 7 coincides with the apex of the central angle of divergence of the side walls 6, and the angle of the beginning of the divergence is located in the middle part of the tapering chamber 3. Due to the division of the water flow with the backwater in the tapering chamber 3 and the creation of braking at the beginning, then at the end of the chamber 3 it expands and enters the expanding damping chamber 5 with a curved in plan water overflow wall 7 with slots 8, and when connected to the tailwater of the outlet channel 2, a rectilinear transverse threshold 9 is additionally installed, providing support towards the expanding chamber 5. The choice of specific water flow is directly related to the issue of damping the energy of the flow towards the continuation path of the outlet channel 2, and its securing of the bottom, when connecting the pools in spatial conditions.

EFFECT: increase of efficiency of operation under conditions of variable water flow rates in an open channel and hydraulic processes due to the features of the structural elements between the interface pools, as well as simplification of the design of the method for controlling the flow regime coming from the high-flow inlet channel into the tapering chamber, then into the short expanding chamber with its design dimensions.

4 cl, 2 dwg