Water conservancy and hydropower project energy dissipation method

Abstract

The invention relates to the technical field of water conservancy and hydropower projects, and aims to provide a water conservancy and hydropower project energy dissipation method with good energy dissipation effect. According to the technical scheme, the water conservancy and hydropower project energy dissipation method includes the core steps that a discharge port is formed in the upper part ofa dam, and a first discharge channel and a second discharge channel are arranged to communicate with the discharge port; and during discharging, the flow of water is divided into two parts from the discharge port, one of the parts is normally discharged along the first discharge channel, and the other one of the parts is discharged through the second discharge channel, the flow of the water discharged from the second discharge channel is raised upwards and ejected under the action of a flow deflecting mechanism, the flow of the water discharged from the first discharge channel collides with the flow of the water discharged from the second discharge channel through the guiding action of a flow guiding mechanism, and thus energy dissipation is achieved. The water conservancy and hydropower project energy dissipation method has excellent energy dissipation effect.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to an energy dissipation method for water conservancy and hydropower engineering. Background technique [0002] At present, with the gradual development of hydropower resources in mountainous rivers in my country, the development of hydropower engineering construction in China has entered a climax stage, especially in the western mountainous areas where a large number of small and medium hydropower stations have been built. The water flow in natural rivers is generally a slow flow, and the single-width flow distribution along the river width is relatively uniform. However, when drainage structures such as dams and sluices are built in the river, the flow conditions of the river have undergone tremendous changes, and the flow velocity and energy of the discharged water are large, which has a great destructive effect on the riverbed downstream of t...

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Problems solved by technology

However, there are still huge defects in this structure. Because the water flow is relatively concentrated during the falling process, it often causes serious local erosion to the downstream landing point.

At the same time, when the discharge flow rate is large and the flow rate is fast, the high-speed water flow hits the landing point, causing the riverbed to sink severely at the landing point, which greatly changes the original appearance of the riverbed and increases the instability of the flow regime.

At the same time, when the water level difference between the upstream and downstream is large, the kinetic energy carried by the water flow itself is relatively large, and the simple energy dissipation method of deflecting flow often fails to achieve the expected energy dissipation effect

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