Tweezers-shaped water tongue transverse collision energy dissipator

Abstract

The present invention proposes a kind of tweezers-shaped water tongue horizontal (left and right direction of water flow) collision energy dissipator, on the end floor of the discharge structure adopting deflecting flow energy dissipation, such as the overflow dam surface, the spillway chute or the end of the flood discharge tunnel, Along the water flow direction, an upstream section (front end, ie upstream end) with a sharp angle design, similar to a shuttle-shaped flow diversion pier, divides the original chute water flow into left and right two streams. The tail of the diversion pier gradually narrows, and at the same time, the width of the sill gradually narrows so that the inner and outer boundaries of the two water flows shrink. The bottom plate of the sill is designed as a reverse arc. Meet in the air to produce a lateral (left and right direction) collision. Due to the high velocity of the water flow, the water tongue will spall in the lateral direction after the collision, so as to achieve the purpose of laterally dispersing the water tongue, thereby reducing the effect of downstream erosion and solving the problem of flood discharge and energy dissipation of the project, especially for projects with high water head, large flow, and narrow valleys , can further improve the energy dissipation efficiency, and further reduce the scouring damage of the downstream river bed by the water flow.

Description

technical field [0001] The invention belongs to the field of flood discharge and energy dissipation in water conservancy and hydropower projects, and particularly designs an energy dissipation structure applied to the lateral collision of water tongues at the outlet of flood discharge structures. Background technique [0002] 70% of my country's water energy resources are concentrated in the southwest region. Many water conservancy and hydropower projects in this region are characterized by high water head, large flow, and narrow river channels. Flood discharge and energy dissipation are key technical problems in project construction. In order to meet the energy dissipation and anti-scour requirements of high water head, large flow, and narrow river valley projects, the high-speed water flow discharged is stretched and dispersed along the longitudinal direction (upstream and downstream directions) as far as possible, so that the area where the tongue falls into the water is f...

AI Technical Summary

Problems solved by technology

At present, there have been some research results on the energy dissipation of the flood discharge and deflecting water tongues that collide and dissipate energy in the vertical (up and down) direction. Mid-hole water tongue collision energy dissipation in mid-air, there are few studies on water tongue transverse air collision energy dissipation

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