黄丰水电站泄洪闸泄流三维数值模拟

发布时间：2018-04-28 06:35

本文选题：泄洪闸 + 物理模型试验　；参考：《西北农林科技大学》2014年硕士论文

【摘要】：泄洪闸是低水头枢纽主要的泄洪建筑物，在枢纽建筑物的设计研究过程中，准确地模拟泄洪闸内部的流场信息，保证体型设计合理、工程安全运行具有非常重要的意义。对泄水建筑物泄流的研究方法主要有物理模型试验、理论分析和数值模拟计算。近年来，，随着计算机技术的不断发展和数值计算方法的不断改进，数值模拟方法速度快、花费少、信息完整等优点逐步显示出来，已被越来越多的国内外水利科研工作者重视。本文以黄丰水电站工程为研究对象，利用FLUENT商用软件对泄洪闸泄流进行了三维流场数值模拟。利用标准k－ε湍流数值模型封闭Reynods方程，采用流体体积分数法（VOF法）追踪自由液面，网格划分采用了四面体非结构网格，并在水流流态变化较快区域进行网格加密，应用SIMPLE算法来进行压力校正，得到校核工况下泄洪闸的泄流能力、水流流态、水面高程、速度场及压力场等计算结果，通过与模型试验观测结果比较，两者吻合较好，说明数值模拟采用的模型合理、方法正确。
[Abstract]:Flood sluice is the main flood-releasing structure in low-head hub. In the process of design and research, it is of great significance to accurately simulate the flow field information inside the sluice, to ensure the reasonable design of the shape and to ensure the safe operation of the project. Physical model test, theoretical analysis and numerical simulation are the main methods to study the discharge of drainage structures. In recent years, with the continuous development of computer technology and the continuous improvement of numerical calculation methods, the advantages of numerical simulation methods, such as fast speed, less cost and complete information, have been paid more and more attention to by more and more water conservancy researchers at home and abroad. This paper takes Huangfeng Hydropower Station as the research object and makes use of FLUENT commercial software to simulate the three dimensional flow field of the sluice. The standard k- 蔚 turbulence numerical model is used to close the Reynods equation, and the fluid volume fraction method is used to track the free surface. The tetrahedron unstructured mesh is used in the mesh division, and the mesh encryption is carried out in the rapidly changing region of the flow state. The SIMPLE algorithm is used to calibrate the discharge capacity, water flow state, water surface height, velocity field and pressure field of the sluice. The results are in good agreement with the results of the model test. It shows that the model used in numerical simulation is reasonable and the method is correct.
【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】：2014
【分类号】：TV135

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