Research On Hydraulic Model Test And Numericali Simulation Of Gujun Reservoir

In hydraulic engineering,facing the flood discharge and energy dissipation with high water head and large flow,the choice of energy dissipation scheme plays an important role in the whole flood discharge project.Combining economic,geological,hydrological and other factors to choose the optimal energy dissipation scheme can not only ensure the safety of the whole flood discharge energy dissipation,but also meet the practicality and economy.Solid drain the reservoir based on the river in sichuan province building water conservancy design,combined with the hydraulic model test,based on different factors such as flow energy dissipation scheme of measurement and observation,choose the best energy dissipation scheme,and to the best solutions of different position of hydraulic elements such as pressure,velocity,water depth measurement and observation,safety and rationality of drainage structures,Local optimization suggestions are put forward and verified with hydraulic model.Through the three-dimensional flow field numerical simulation of the optimal scheme of combined flood discharge and energy dissipation at the bottom of the surface,further analysis and verification of its integrity and rationality.The main research results are as follows:(1)The model test results show that the overall discharge capacity of the drainage building meets the requirements and the layout is reasonable.In broad tail pier of Y type joint stilling basin,X wide end pier stilling basin with no broad tail pier a combination of three energy dissipation scheme comparison,because Y and X wide end pier plan don’t meet the requirements of the flow regime,stilling basin base plate can’t to the expected standard,and there is no broad tail pier plan the flow regime is good,the optimal scheme selection without the wide tail pier energy dissipation scheme.(2)Through the study and analysis of the hydraulic characteristics of the optimal scheme,the top elevation of each part of the spillway dam section,bottom hole Woge section and anti-arc section all meet the requirements of flow,and the height of the middle and rear side wall of the damping tank is insufficient.The velocity distribution of the whole drainage building is reasonable and in accordance with the distribution law.Surface hole section appears small negative pressure,no cavitation water flow.There is a large negative pressure in the Woge section and the reflected arc section of the bottom hole,which may lead to cavitation water flow,so it cannot meet the requirements of overflow,so it needs to be modified and optimized.(3)Two modification schemes are made for the Woge section of the bottom hole and comparative analysis is made.In scheme 2,there is basically no large negative pressure when the bottom hole gate is fully open and local open,which meets the requirements of overflow.The overall bottom hole pressure has been significantly improved,and the pressure distribution conforms to the basic law.This poject table,bottom hole.(4)Using the Fluent software joint flood discharge energy dissipation are three dimensional flow field numerical simulation,under different conditions to calculate the flow regime in the domain,the surface of the water line,pressure and velocity of compare analysis,physical model test and numerical simulation is verified the basic alignment is higher,prove the reliability of numerical simulation in this application and feasibility.