【摘要】 施工导截流是水利水电工程施工过程中关键的控制性工程,对施工工期、造价及安全都有着极其重要的意义。文章利用节点耦合的质量及动量守恒方法建立了一二维耦合有限体积施工导截流模型。为了验证耦合模型精度,将一二维耦合模型计算水位、流速及流量值与物理模型试验数据进行对比,模型计算结果与实验数据吻合良好。然后,将该耦合模型应用于水利枢纽导截流工程,对施工导流过程中河道及泄流低孔内水位及流速变化进行了模拟分析。该一二维耦合模型适用于实际水利枢纽导截流工程流场及相关水利参数模拟计算,为类似导截流工程的流场计算及设计施工提供了一种新的有效工具。更多还原

【Abstract】 Construction diversion and closure is a key project in the hydraulic engineering, which is of great significance to the construction period, cost and safety. In this paper, a 1 D-2 D coupled finite volume model was established by using a mass and momentum conservation method. To validate the coupled model, the calculated water level, velocity and flow rate were compared with the experimental data. The numerical results of the 1 D-2 D coupled model are in good agreement with the experimental data. Then, the coupled model was applied to the construction diversion and closure of the hydro-junction project to analyze the water level and velocity in the river channel and discharge low holes. In a word, the 1 D-2 D coupled model can be used to simulate the flow field and relevant hydraulic parameters of the construction diversion and closure of the real hydro-junction project. It provides a new and useful tool for the flow field calculation, design and construction of similar construction diversion and closure projects.更多还原