Full-section aerated hydraulic facility with pressure inlet of a multi-hole open channel

Abstract

The invention provides a one-gate multi-pore type open channel pressure inlet full-cross-section aeration hydraulic facility. At least one vertical partition is arranged at the position, on an orifice of a pressure inlet section of an open channel, in a pressure water body in the water flow direction, the orifice of the pressure inlet section is isolated into at least two parallel narrow-deep type independent overflow channels through the partitions, and the multiple overflow channels are synchronously opened and closed through the same working gate. A drop sill is arranged at the joint of a bottom plate of the orifice of the pressure inlet section and a bottom plate of an open flow section, after the working gate is opened, currents on the two sides of the partitions form a vertical aeration cavity communicating with the atmosphere behind the tail ends of the partitions, and a bottom aeration cavity formed by bottom-layer currents in the overflow channels at the position of the drop sill communicates with the vertical aeration cavity. By the adoption of the aeration hydraulic facility, full-cross-section massive aeration of all currents entering the open channel can be achieved, and the aeration cavitation reducing effect of an overflow wall of the open channel, especially the bottom plate is improved.

Description

technical field [0001] The invention belongs to the technical field of aeration and corrosion reduction in water conservancy and hydropower projects, and in particular relates to a full-section aeration hydraulic facility with a pressurized inlet in an open channel. Background technique [0002] Water flow cavitation refers to the phenomenon that the pressure at a certain point in the water body is lower than the saturated vapor pressure of water, so that a cavity is formed there. When the cavity collapses, a huge shock wave will be generated. If the cavity is located near the flow wall, the shock wave generated by the cavity collapse will act on the flow wall, causing fracture or fatigue damage of the wall material and denudation. , that is, the cavitation phenomenon. Many studies and engineering examples have shown that artificial forced aeration can achieve the effect of corrosion reduction, that is, aeration is carried out to the water flow or directly to the area where...

AI Technical Summary

Problems solved by technology

However, the transverse wedge used in this method is located in the middle area of ​​the pressurized orifice, and the air entrained through the aeration cavity may not reach the bottom of the channel and start to escape, so that the aeration protection of the bottom of the channel cannot be well realized.

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