Experimental device for release accelerating research of oversaturated gas in under-dam watercourses

Abstract

The invention discloses an experimental device for release accelerating research of oversaturated gas in under-dam watercourses. The experimental device comprises a circulating water pool, a variable-frequency water pump, a high-pressure reactor, a slope-variable thermostatic water bath and a grit chamber which are in sequence connection. A water outlet of the grit chamber is connected with a water inlet of the circulating water pool to form water circulation. The high-pressure reactor is connected with an oxygen supply box inputting oxygen therefor and provided with a gas regulating valve, a safety gas valve, a gas pressure gauge and a total dissolved gas determinator. A silt input box is arranged at the top of two side walls of the thermostatic water bath. A turbulence speeding device, a node model, a front total dissolved gas determinator, a rear total dissolved gas determinator, a front three-dimensional ADV (acoustic Doppler velocimetry) instrument and a rear three-dimensional ADV instrument are arranged in the thermostatic water bath. The experimental device is simple in structure, convenient to use and capable of satisfying mechanism research of oversaturated gas in under-dam watercourses in terms of water turbulence, silt, different watercourse node boundaries, water temperature and the like.

Description

technical field [0001] The invention belongs to water conservancy and hydropower engineering basins, and relates to an experimental device for supersaturated dissolved gas in a channel under a dam, in particular to an experimental device for researching the accelerated release of supersaturated gas in a channel under a dam. Background technique [0002] With the construction of a large number of high dams, the environmental problems brought about by this have attracted more and more attention. During the discharge process of the high dam, due to the high discharge head and high flow velocity, a large amount of air is entrained into the water flow, thus forming a strong aerated water flow. When the water flow carrying a large number of air bubbles collides with the water body under the dam and enters the deep water area, a large amount of gas is released and dissolved in the water body due to the influence of turbulence and water pressure changes, which increases the saturati...

AI Technical Summary

Problems solved by technology

The idea of ​​the existing technology is mainly to measure the relationship between water flow turbulence, sediment, etc. and gas release for fluid (flume experiment) or non-fluid (stirring experiment) water bodies; The impact of the release of supersaturated gas cannot simulate the process of the dynamic distribution of water and sand on the release of supersaturated gas, so it is difficult to carry out in-depth development of measures to accelerate the release of gas supersaturation based on this traditional technology

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