船闸工程输水系统三维数值模拟研究

3D Numerical Simulation of Water Conveyance System in Ship Lock Works

本文模拟和分析京杭运河微山三线船闸工程的输水系统水力特性、压力特性、通航与泊稳水流条件及局部水流条件等,为输水系统型式及设计提供科学依据。基于建立的三维数学模和VOF模型,模拟了输水系统三维水动力变化特征。结果表明:在最大设计水头4.0 m条件下,阀门双边4~7 min匀速开启时,闸室充水惯性超高在0.20 m以内,满足规范要求,消能室及消力塘型式能使廊道高速水在平立面上碰撞掺混消能充分,整体上流态相对较好。对于2000 t船舶不同停泊位置,各充水工况闸室最大水面比降为1.18‰,出现在闸室上段中部,换算最大纵向静水压力为31 kN,满足规范要求。

By simulating and analyzing the hydraulic and pressure characteristics of the water conveyance system in Weishan three-line ship lock works of Beijing-Hangzhou Canal as well as the flow conditions for navigation and ship berthing and local flow conditions,a scientific pattern of water conveyance system was determined and an appropriate design plan was carried out.3D mathematical model and VOF model were built to simulate 3D hydrodynamic variation characteristics of the water conveyance system.The results showed that the inertia height of water filled in the ship lock chamber is 0.2 m or less which met the requirements of specifications when both sides of the valve were opened at a constant speed ranging from 4 minutes to 7 minutes under the condition of maximum design water head at 4.0 m.The patterns of energy dissipation chamber and pond could fully reduce the energy of water at high speed in the corridor by colliding and blending on a flat facade,and the water kept relatively good flow state as a whole.For 2000 t ships at different anchorages,the maximum water surface gradient of the ship lock chamber under different water filling conditions was 1.18‰,which appeared in the middle of the upper section of the ship lock chamber,and could be converted into the maximum longitudinal hydro-static pressure of 31 kN.The above data met the requirements of specifications.