二维有限体积水动力学模型研究及在抚河尾闾整治工程中应用

发布时间：2018-03-22 10:07

本文选题：有限体积法　切入点：水动力学模型　出处：《南昌大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着计算机数值模拟技术的日益完善,水动力学模型研究方法正被越来越多的工程项目所应用。建立水动力模型的核心技术之一便是控制方程的离散,其中有限元法、有限差分法和有限体积法被称为经典的网格离散方法。本文首先介绍了有关数学模型的基本方法及研究现状,并对二维水动力数学模型的理论从公式推导、建立方程、方程求解、网格划分和编号及最后的高性能计算进行了详细的描述。结合有限体积法(FVM),在二维非结构网格的基础上,对抚河尾闾整治工程建立了采用Fortran语言进行编译和计算的水动力学模型。针对抚河尾闾整治工程中改道工程在不同的洪水工况下对上下游水位影响进行了分析验算。基于有限体积法(FVM),对抚河再改道工程实施后;疏浚工程实施后;三阳闸工程实施后;抚河再改道工程、疏浚工程和三阳闸工程同时实施后对水流的影响进行了分析。在再改道工程实施情况下,水流由原河道改道后进入青岚湖,青岚湖转变为行洪河道,湖区水位普遍壅高,而自改道口以上的沿程水位则有不同程度的降低、流速普遍增加;疏浚工程实施后对青岚湖区水位和流速变化基本无影响;三阳闸工程实施后青岚湖区水位普遍壅高;抚河再改道工程、疏浚工程和三阳闸工程同时实施后,自改道以上越往上游受三阳闸工程影响越小。
[Abstract]:With the improvement of computer numerical simulation technology, hydrodynamic model research methods are being used by more and more engineering projects. One of the core techniques for hydrodynamic modeling is the discretization of governing equations, in which finite element method is used. The finite difference method and finite volume method are called the classical grid discretization method. In this paper, the basic methods and research status of the mathematical model are introduced, and the equations of the two-dimensional hydrodynamic mathematical model are derived from the formula. Equation solving, mesh division and numbering, and the final high performance calculation are described in detail. Based on the finite volume method (FVM), a two-dimensional unstructured mesh is used. This paper establishes a hydrodynamic model to compile and calculate the tail regulation project of Fuhe River using Fortran language, and analyzes the influence of diversion project on the upstream and downstream water level under different flood conditions. Calculation. Based on the finite volume method, after the implementation of the Fuhe River re-diversion project; After the implementation of the dredging project, the implementation of the Sanyang sluice project, the rerouting project of the Fuhe River, the dredging project and the Sanyang sluice project at the same time, the influence of the dredging project on the flow of water is analyzed. The water flow changed from the original channel to the Qinglan Lake, and the Qinglan Lake changed into a flood discharge channel. The water level in the lake region was generally high, while the water level along the road above the self-changed road entrance was reduced to varying degrees, and the velocity of flow was generally increased. After the implementation of the dredging project, there is basically no effect on the changes of water level and velocity in Qinglan Lake area; after the implementation of the Sanyang sluice project, the water level in Qinglan Lake region is generally high; after the rerouting project of the Fuhe River, the dredging project and the Sanyang sluice project are implemented at the same time, The more upstream the diversion, the smaller the impact of the Sanyang sluice project.
【学位授予单位】：南昌大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TV131.2;TV85

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