Research On Comprehensive Energy Dissipation Of Bottom-flow With Shock Pier, Steps And Stilling Basin

It’s important to choose an appropriate type of energy dissipation in release structures, Flood discharge and energy dissipation is always an important factor for water-control project. Underflow energy dissipation is a common way of energy dissipation. It uses the form of hydraulic jump to eliminate the excess kinetic energy of the water, through the construction of stilling basin or stilling basin so that water jump occurred in them. When the upstream flow velocity can be large, only through the stilling basin and can not achieve the desired effect of energy dissipation, water that didn’t eliminated fully will still cause severe erosion downstream riverbed. To increase the energy dissipation and reduce the amount of excavation during construction of stilling basin, an idea is proposed that use the combination of shock pier, stairs and stilling basin in an engineer. The main theoretical calculation and the combination of hydraulic model test method, the combination of the three hydro energy dissipation characteristics for a more systematic research. The recherche contents of this paper are summarized as follows:1. Summarize the basic theory of energy dissipation and its significance, and summarize the research progress into years. Summarizes the common focus for energy dissipation by energy dissipation, such as underflow energy dissipation, pick the flow of energy dissipation, surface flow energy and other basic flow patterns and their respective characteristics and application conditions.2. Summarize the stilling basin, impact pier, stepped energy dissipation basic hydraulic characteristics, analyzes the energy dissipation and the inverse slope stepped down slope on the ladder of energy dissipation characteristics.3. Combined with the actual project to study the impact of pier stilling basin combined with the energy dissipation of hydraulic characteristics, summarized the stilling basin along the tail from the water hole pressure value to their combination of energy dissipation, the distribution and velocity of the water line and within the given formula stilling basin energy dissipation rate through.4. Study on the model test, by the stilling basin additional steps, study the impact of the pier, steps and hydraulic characteristics stilling basin united dissipation of energy, that is, its along the pressure, the water line and the velocity distribution, by calculating the energy dissipation rate plus Let the step before the program were compared.