Tweezers-shaped nappe transverse collision energy dissipater

Abstract

The invention provides a tweezers-shaped nappe transverse (in the left-right direction of water flow) collision energy dissipater. On a release structure tail-end bottom plate, such as an overflow damsurface, a spillway discharge chute or spillway tunnel tail end, adopting a mode of energy dissipation by trajectory jet, a diversion pier of which the upstream section (the front end, that is, the incident flow end) is designed in a sharp corner shape and is similar to a shuttle shape is arranged in the water flow direction, and original water flow of a discharge chute is divided into left waterflow and right water flow. The tail of the diversion pier is gradually narrowed, meanwhile, the width of a flip bucket is also gradually decreased, and thus, borders of the inner sides and the outersides of the two steams of water flow are contracted; and a bottom plate of the flip bucket is designed in a reverse arc shape, and after the left water flow and the right water flow come out from theflip bucket, nappes meet in air to generate transverse (in the left-right direction) collision. Because the water flow rate is high, the nappes are transversely split after collision, the purpose oftransversely dispersing the nappes is achieved, accordingly, the effect of reducing scouring to the downstream portion is achieved, the engineering flood discharge and energy dissipation problems aresolved, especially for engineering with high water head, large flow rate and narrow river valleys, the energy dissipation efficiency can be further improved, and scouring and damage of water flow to the downstream river bed are further reduced.

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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