Experimental Study On Energy Dissipation And Erosion Prevention Of A Hydropower Station In Xinjiang

In the construction of water conservancy and hydropower,flood discharge energy dissipation is directly related to the complex problem of engineering safety,is a very important research topic in the field of water conservancy and Hydropower Engineering,has an important influence on the layout and scale of water conservancy engineering of water conservancy and hydropower engineering.With the development of our country,faced with high water head,discharge the big problem,the downstream river bed with complex geological conditions,the energy dissipation problem is very prominent.Because of geological conditions of each project,there are characteristics of hydrology and river characteristics.Therefore,we should focus on the specific projects,specific issues,choose safe and reasonable downstream energy dissipation.For low head,large flow of water conservancy engineering,energy dissipation is a commonly used energy dissipation,stable hydraulic jump energy dissipation effect is good,the downstream water surface fluctuation is small.The energy dissipation can be combined with the auxiliary energy dissipater form by engineering,in order to reduce the amount of engineering,energy dissipation to improve the efficiency of Xinjiang hydropower station is a typical low head,large flow of hydropower station,the station stopped sluice river water diversion project with energy dissipation.Because the river summer flood 6~8 monthly water accounted for to water 60%~70%,upstream reach the design flood level and check flood,the river bed scour so serious.In order to ensure the safety of the design.The physical model test of the energy dissipation measures is carried out,and the flow characteristics and riverbed scour downstream of the hydro junction are studied.This paper builds the geometric scale of normal overall hydraulic model of 1:40,the river water diversion project of the system energy dissipation experiment.When the upstream runoff for design flood,first by changing the end sill height and slope,the energy dissipation effect is verified.On the basis of the existing needle.The design scheme of the problem,combined with different auxiliary energy dissipater optimization experiment.The original condition optimization of a gradient of 1:1.5the end sill to vertical end sill;optimization of stilling pool level two apronlengthened 3.75 m,and the vertical end sill and toe pier dissipator combination optimization;three in optimization two on the basis of the end sill height 0.8 M;optimization of stilling pool level Four apron lengthened 3.75 m,and the tooth end sill.Through the sluice discharge capacity,water depth,flow velocity and riverbed scouring were analyzed,and ultimately determine the optimal square case,test results.The best optimization applied to the case of square check flood water condition,also made a good energy dissipation effect.This paper finally established the level of the tooth and apron extension end sill,solves the hydropower station in Xinjiang River hub of the energy dissipation problem of similar engineering energy dissipation and anti scour research has some reference.