大桥水库大坝逐渐溃决的数值模拟

发布时间：2018-12-23 18:33

【摘要】：根据逐渐溃坝模型原理和FLUENT软件的二次开发程序,建立两种逐渐溃坝模型,编制水库水位随溃坝洪水下泄而变化的UDF程序和溃口动态变化的UDF程序,对大桥水库大坝溃决过程和溃坝水流进行三维数值模拟,较准确地描述了大坝溃决的机理、溃口发展过程、坝址处洪水的水位和流量过程线,对比分析了线性模型和冲蚀模型的水位过程、流量过程、水面形态、流速分布等模拟结果。分析表明,三维逐渐溃坝模拟能形象而精确地展示溃口的水面形态和流速场分布。
[Abstract]:According to the principle of progressive dam-break model and the secondary development program of FLUENT software, two kinds of progressive dam-break models are established, and the UDF program of reservoir water level changing with dam-break flood discharge and the UDF program of dynamic change of burst are worked out. Three-dimensional numerical simulation of dam collapse process and dam break flow is carried out, and the mechanism of dam collapse, the development process of break mouth, the process line of flood level and discharge at dam site are described more accurately. The simulation results of water level process, discharge process, water surface shape and velocity distribution are compared between the linear model and the erosion model. The analysis shows that 3D progressive dam break simulation can vividly and accurately display the surface shape and velocity field distribution of the burst.
【作者单位】：四川大学水利水电学院;上海勘测设计研究院有限公司四川分公司;雅砻江流域水电开发有限公司;
【分类号】：TV122.4

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