Model Experiment And Numerical Simulation Of An Electricity Station Tail Water

With the highly developing economy of our country, the needs of the energy are more and more increasing. What is followed is that the forest areas are reduced increasingly, and the soil erosion is aggravating. In this kind of condition, the river shores collapse and the reservoirs are silted up and the river beds drive up. All these affect normal functions of the reservoir. Driving up of the tail water level will reduce the efficiency of the electricity station and make the needs of the energy be further increasing.One of the main purposes is to fluent the downstream and acquire the definite water head by lowering the lever of downstream, In general conditions, we needs a project with little investments but higher efficiency. Furthermore, it should even not affect the environment of the riverside.Due to complexly changing of the boundary conditions of natural watercourse curren and the river and so many related variables, so many problems can not be described using the existing theories, and it is also very difficult to resolve them by experiences. So the watercourse model experiments become very important means to resolve these complicated problems. According to the actual project about Hongshi power station, immobiled bed model examination is chosen to research the changing of water head in various conditions with different flux. Moved bed model is used to research how the bed elevations will change under the different flood flux. In the end, the reasonable project for digging is chosen, and the efficiency is calculated and confirmed.In recent years, according to the physics equations the mathematics model has been established and the ways of numerical simulation has been widely used. It has many advantages, such as fast, with few working, and so on.The results of numerical simulation are used in this project to choose a reasonable project for digging and compare with results of the experiment. The conclusion is that the two results are corresponding to each other.hi the end, comparing with the results of experiment and the calculation, the most economical project that is also easily put in practice is chosen. Moreover this project takes care of the riverine renovation and the maintenance of the mountain beside the river, and cares economically the investment too.