偏桥水电站泄洪闸泄流三维数值模拟

发布时间：2018-04-20 19:04

本文选题：水电站 + k-ε模型　；参考：《西北农林科技大学》2014年硕士论文

【摘要】：在水电工程建设中，经常遇到泄水建筑物过流能力、体型优化及枢纽下游消能防冲等问题，解决这些问题的传统方法通常是借助物理模型试验。近些年来，随着计算机性能的不断提升和计算流体动力学的快速发展，使得数值模拟方法可以部分或全部的应用于水工建筑物泄流问题的研究中，这不仅为工程提供了泄水建筑物内部水流流动的完整信息，而且还较大程度的解放了人力，节省了财力和时间。本文以九龙河偏桥电站工程为研究对象，利用FLUENT软件建立了数值模拟区域，采用非结构化网格和隐式算法，以标准的k—ε湍流模型封闭Reynods方程，采用VOF法追踪自由水面，对偏桥水电站泄洪闸泄流按定常流动进行了三维数值模拟，并提取了泄洪闸的泄流能力、水面线、压力分布和流速分布等计算结果，，经与模型试验实测值比较发现，两者吻合良好。说明数值模拟采用的模型合理，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]:In the construction of hydropower projects, problems such as overcurrent capacity, optimization of configuration and downstream energy dissipation and scour prevention are often encountered. The traditional method to solve these problems is usually through physical model test. In recent years, with the continuous improvement of computer performance and the rapid development of computational fluid dynamics, numerical simulation methods can be partially or wholly applied to the study of hydraulic structure discharge problem. This not only provides the complete information of the flow of water in the drainage building, but also liberates the manpower to a great extent and saves the financial resources and time. In this paper, the numerical simulation area of Jiulong River skew Bridge Hydropower Station is established by using FLUENT software. The unstructured mesh and implicit algorithm are used to close the Reynods equation with the standard k- 蔚 turbulence model, and the VOF method is used to track the free water surface. Three-dimensional numerical simulation of sluice discharge according to steady flow in Qianqiao Hydropower Station is carried out, and the calculation results of discharge capacity, water surface line, pressure distribution and velocity distribution of sluice are obtained, which are compared with the measured values of model test. The two match well. It is shown that the model used in 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】：2014
【分类号】：TV135.2

【共引文献】