溢流坝泄流过程水流流态数值模拟

发布时间：2018-01-01 08:17

本文关键词：溢流坝泄流过程水流流态数值模拟　出处：《大连理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着电力行业对“十二五”规划第六篇相关内容的深入解析,水电能源工程建设又一次步入了黄金时期。而保证水工结构物的安全是开展水利水电项目建设的首要前提,相关的研究应当受到充分地关注。大坝的泄洪能力以及水体的过流形态对水利工程结构的安全运行具有不可忽视的影响。因此,对该方面进行理论分析,并建立符合工程需求且计算高效的数值分析模型,具有实际意义。在国内外溢流坝泄洪能力以及水体过流形态相关研究领域,商业计算流体动力学(Computational Fluid Dynamics,CFD)软件FLUENT,因内置了丰富的物理模型、开放了优秀的用户自定义函数功能、具有强大的计算能力、适应多个行业的不同要求,而得到了国内外众多学者和科研人员的认可,进而在水工结构分析领域日渐得到广泛应用。目前,关于溢流坝水体过流形态和过流能力的数值模拟相关研究没有得到足够的关注。本文围绕溢流坝溢流过程的数值模拟进行了以下工作：(1)通过对三种经典堰型的九个基本算例的计算,验证了以下方法的正确和可靠性：使用VOF多相流模型来追踪水气交界面的位置,单步收敛速度更快的PISO算法为压力速度耦合方式,使用重整化群湍流模型对溢流坝进行模拟。(2)以石龙和双沟两座电站的溢流建筑物为研究对象,使用前述模拟方法进行数值实验,对比分析了两个溢流模型在数值模拟、原位试验以及模型试验三种不同研究手段下泄流能力异同,验证了本文所提供模拟参数在工程应用上的适用性,丰富了溢流坝数值分析手段。综上,本文基于FLUENT平台,对软件所使用的CFD的理论基础进行阐述,验证了使用该软件分析溢流坝溢流时水体的过流形态和过流能力问题的可行性,为日后受条件所限不能进行现场实验时分析同一类问题提供了一种解决途径。
[Abstract]:With the power industry to the "12th Five-Year Plan" 6th related content in-depth analysis. The construction of hydropower and energy engineering has entered a golden period once again, and ensuring the safety of hydraulic structures is the first prerequisite for the construction of water conservancy and hydropower projects. The relevant research should be paid more attention to. The flood discharge capacity of the dam and the over flow form of the water body can not be ignored to the safe operation of the water conservancy engineering structure. Therefore, the theoretical analysis of this aspect is carried out. It is of practical significance to establish a numerical analysis model which accords with the engineering requirements and computes efficiently. It is of practical significance to study the flood discharge capacity of spillway dams at home and abroad as well as the related research fields of water overflow morphology. Commercial Computational fluid Dynamics (CFD) software fluent, which has a rich physical model built in, is a computer Fluid dynamic FDD software. Open the excellent user-defined function function, have powerful computing ability, adapt to the different requirements of many industries, and have been recognized by many scholars and researchers at home and abroad. And then it is widely used in the field of hydraulic structure analysis. There is not enough attention to the research on the numerical simulation of overflow dam's over flow shape and capacity. The following work is done around the numerical simulation of overflow dam's overflow process: 1). Through the calculation of nine basic examples of three classical Weir types. The correctness and reliability of the following methods are verified: the VOF multiphase flow model is used to track the position of the water-air interface, and the PISO algorithm, which converges faster with one step, is a pressure-velocity coupling method. Using the renormalization group turbulence model to simulate the overflow dam. (2) taking the overflow buildings of Shilong and Shuanggou power stations as the research objects, the numerical experiments are carried out using the above-mentioned simulation method. The differences and similarities of discharge capacity of two overflow models under numerical simulation, in-situ test and model test are analyzed, and the applicability of the simulation parameters provided in this paper in engineering application is verified. Enrich the means of numerical analysis of overflow dam. In summary, based on the FLUENT platform, this paper describes the theoretical basis of the CFD used in the software. The feasibility of using the software to analyze the overflowing shape and overflow capacity of overflow dam is verified, which provides a solution for analyzing the same kind of problem when the condition is limited in the future.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TV652.1;TV135.2

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