本文選題：有限體積法　切入點(diǎn)：水動(dòng)力學(xué)模型　出處：《南昌大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：隨著計(jì)算機(jī)數(shù)值模擬技術(shù)的日益完善,水動(dòng)力學(xué)模型研究方法正被越來(lái)越多的工程項(xiàng)目所應(yīng)用。建立水動(dòng)力模型的核心技術(shù)之一便是控制方程的離散,其中有限元法、有限差分法和有限體積法被稱(chēng)為經(jīng)典的網(wǎng)格離散方法。本文首先介紹了有關(guān)數(shù)學(xué)模型的基本方法及研究現(xiàn)狀,并對(duì)二維水動(dòng)力數(shù)學(xué)模型的理論從公式推導(dǎo)、建立方程、方程求解、網(wǎng)格劃分和編號(hào)及最后的高性能計(jì)算進(jìn)行了詳細(xì)的描述。結(jié)合有限體積法(FVM),在二維非結(jié)構(gòu)網(wǎng)格的基礎(chǔ)上,對(duì)撫河尾閭整治工程建立了采用Fortran語(yǔ)言進(jìn)行編譯和計(jì)算的水動(dòng)力學(xué)模型。針對(duì)撫河尾閭整治工程中改道工程在不同的洪水工況下對(duì)上下游水位影響進(jìn)行了分析驗(yàn)算。基于有限體積法(FVM),對(duì)撫河再改道工程實(shí)施后;疏浚工程實(shí)施后;三陽(yáng)閘工程實(shí)施后;撫河再改道工程、疏浚工程和三陽(yáng)閘工程同時(shí)實(shí)施后對(duì)水流的影響進(jìn)行了分析。在再改道工程實(shí)施情況下,水流由原河道改道后進(jìn)入青嵐湖,青嵐湖轉(zhuǎn)變?yōu)樾泻楹拥?湖區(qū)水位普遍壅高,而自改道口以上的沿程水位則有不同程度的降低、流速普遍增加;疏浚工程實(shí)施后對(duì)青嵐湖區(qū)水位和流速變化基本無(wú)影響;三陽(yáng)閘工程實(shí)施后青嵐湖區(qū)水位普遍壅高;撫河再改道工程、疏浚工程和三陽(yáng)閘工程同時(shí)實(shí)施后,自改道以上越往上游受三陽(yáng)閘工程影響越小。
[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.
【學(xué)位授予單位】：南昌大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TV131.2;TV85

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