基于数字孪生与CFD的水闸水力特性分析及翼墙结构优化——以三联水闸为例OA

To address the problems of poor flow pattern and insufficient discharge capacity during the actual operation of sluices,this study takes the Sanlian Sluice in Yulin City,Guangxi as the research object.A three-dimensional CFD model is established based on digital twin technology.Adopting the standard k-e turbulence model and the VOF multiphase flow method,the hydraulic characteristics of the existing sluice are systematically analyzed,and an optimization scheme is proposed,in which the right-angle sections of the upstream and downstream wing walls on the left bank are modified into 5-meter inclined gradual transition sections.The results show that before optimization,the discharge capacity of the sluice is 5.44％-6.92％lower than the theoretical value.Obvious backflow and eddies occur at the corners of wing walls,resulting in uneven distribution of flow velocity and pressure on both banks.After optimization,the discharge capacity increases by 2.00％,and backflow and eddies are basically eliminated.The transverse non-uniformity coefficient of flow velocity decreases from 0.81 to 0.30,and the pressure fluctuation coefficient drops from 0.25 to 0.09,which significantly reduces the risk of cavitation and erosion of wing walls.CFD simulation based on digital twin can provide reliable technical support for structural optimization and safe operation of sluices.