五道库水电站溢流坝三维数值模拟

发布时间：2018-03-14 16:27

本文选题：溢流现　切入点：水工模型试验　出处：《西北农林科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：水电站工程中泄水建筑是一个重要的子系统,起着关键性的作用。泄水建筑的合理性关乎到水电站及其整个工程的安全性、经济性及风险性。水利工程实践当中,泄洪建筑物的优化设计是至关重要的。泄水建筑物水力特性的研究,主要依靠水工模型试验和数值模拟两种方法。水工模型试验方法其过程与实际水流更加接近,得到的实测数据也比较可靠;数值模拟方法具有速度快、适应性强、花费少等优点,且便于设计方案的比较。因此,水工模型试验和数值模拟计算相结合的方法成为研究水利工程中泄流问题的重要方法。本文以五道库水电站工程为研究对象,基于FLUENT软件,采用结构化六面体网格和非结构四面体网格,选用标准的k~ε湍流模型封闭Reynods方程,使用VOF法追踪自由液面,应用SIMPLE算法来进行压力校正,对五道库溢流坝泄流流场进行三维数值模拟,得到了典型工况下的泄流能力、压力分布、水面线、流速场等计算结果。通过与模型试验结果对比发现,数值模拟结果与模型试验结果吻合良好。说明三维数值模拟运用的模型合理、方法正确,可为实际工程的设计和研究提供一种科学便捷的途径。
[Abstract]:The drainage structure is an important subsystem and plays a key role in the hydropower project. The rationality of the drainage structure is related to the safety, economy and risk of the hydropower station and its whole project. The optimal design of flood discharge structures is very important. The study of hydraulic characteristics of drainage structures mainly depends on two methods: hydraulic model test and numerical simulation. The process of hydraulic model test method is closer to that of actual water flow. The measured data obtained are also reliable, the numerical simulation method has the advantages of high speed, strong adaptability and low cost, and is convenient for the comparison of design schemes. The combination of hydraulic model test and numerical simulation has become an important method to study the discharge problem in hydraulic engineering. This paper takes Wudaoku Hydropower Station as the research object and based on FLUENT software. Using structured hexahedron mesh and unstructured tetrahedron grid, using standard k- 蔚 turbulence model to seal Reynods equation, using VOF method to track free liquid surface, using SIMPLE algorithm to correct pressure. Three-dimensional numerical simulation of discharge field of five-channel overflow dam is carried out, and the calculated results of discharge capacity, pressure distribution, water surface line and velocity field under typical working conditions are obtained. The results of numerical simulation are in good agreement with the results of model test, which shows that the model used in 3D numerical simulation is reasonable and the method is correct, which can provide a scientific and convenient way for the design and research of practical engineering.
【学位授予单位】：西北农林科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV652.1

【相似文献】