Aeration facility adapting to low incoming flow Froude number

Abstract

The invention relates to an aeration facility adapting to a low incoming flow Froude number and a release structure. The facility is suitable for the field of water conservancy and hydropower engineering, and is mainly used for providing fully aerated water flow for the release structure under the condition of low Froude number incoming flow and preventing the release structure from cavitation damage. According to the technical scheme, the aeration facility adapting to the low incoming flow Froude number is arranged on a release structure and is characterized in that the aeration facility is provided with a flip bucket and a drop bucket which are sequentially arranged in the water flow direction, water flow forms a flip bucket water tongue after passing through the flip bucket, a bottom cavity located below the flip bucket water tongue is formed in the downstream of the drop bucket, the bottom cavity is connected with the outside atmosphere through the ventilation hole, and air is mixed into the bottom of water flow from the bottom cavity; and a turbulent part which can make water flow turbulent so as to uniformly mix air mixed into the bottom of the water flow to the whole overflowing cross section is arranged on the bottom plate of the release structure corresponding to a jetting and falling area of the deflecting water tongue.

Description

technical field [0001] The invention relates to an air-mixing facility and a drainage structure adapted to low incoming flow Floyd's number. Applicable to the field of water conservancy and hydropower engineering, it is mainly used to provide sufficient aerated water flow for drainage structures under the condition of low Floyd's number flow, so as to prevent cavitation damage of drainage structures. Background technique [0002] The release structure is an important hydraulic structure to ensure the safety of water conservancy projects and hydraulic structures and reduce flood disasters by venting reservoirs, rivers, channels, and waterlogged areas that exceed the storage or bearing capacity. The cavitation and cavitation caused by the high-speed water flow on the drainage structure is an important problem leading to the damage of the drainage structure. There have been many examples of cavitation damage to the drainage structure in actual engineering. [0003] The aeratio...

AI Technical Summary

Problems solved by technology

However, the aeration capacity of the aeration facilities is still insufficient under the condition of low Floyd's number incoming flow, and the control of cavity return water is still one of the problems of aeration and corrosion reduction.

[0006] figure 1 It is a schematic diagram of the downstream flow of traditional aeration facilities under the condition of low Fahrenheit number flow. Under low Fahrenheit number flow conditions, the aeration capacity of aeration facilities is low, and cavity backwater is easily generated in the bottom cavity, and the backwater submerges the part Even the entire bottom cavity affects the aeration function of the aeration facility

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