An energy dissipation structure for water conservancy and hydropower projects

Abstract

The invention relates to the technical field of hydraulic and hydropower engineering and aims to provide a novel energy dissipating structure of the hydraulic and hydropower engineering, which has a good energy dissipating effect. According to the adopted technical scheme, the novel energy dissipating structure of the hydraulic and hydropower engineering comprises a discharging hole formed in the upper part of a dam, a first discharging channel arranged in the surface of the downstream side of the dam and a second discharging channel arranged in a main body of the dam, wherein the upper end of the first discharging channel is communicated with the tail end of the discharging hole; a water dividing hole is formed in the bottom of the discharging hole and located in the front of a place where the first discharging channel and the discharging hole are connected; the upper end of the second discharging channel is communicated with the water dividing hole; a flow adjusting valve is arranged at the water dividing hole; a water outlet of the second discharging channel is located below a water outlet of the first discharging channel; and water flows respectively discharged by the first discharging channel and the second discharging channel collide with each other to realize energy dissipating. The structure provided by the invention has an excellent energy dissipating effect.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to an energy dissipation structure 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 o...

AI Technical Summary

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

Images