某工作场所甲醛意外泄漏职业危害仿真研究

发布时间：2018-03-23 12:45

本文选题：计算流体动力学（CFD）　切入点：模拟分析　出处：《首都经济贸易大学》2013年硕士论文

【摘要】：工业的飞快发展伴随着危险性物质的使用、生产、储存剧增，一旦发生事故，将对社会造成巨大损失，因此，对危险性气体泄漏扩散规律的研究具有重要意义，也是职业卫生和安全科学领域所面临的重大课题。本文研究就是建立在此背景基础上，对国内外研究现状和气体扩散机理以及影响扩散的因素进行了总结分析，对气体泄漏扩散模型的发展进行了一一介绍，主要包括物理实验、数学模拟、CFD数值模拟。接着对建立在这些模型基础上的软件发展和运用进行总结，详细介绍了本文研究所用的基于CFD（计算流体力学）方法的Fluent软件，以及该软件所用的几种基本控制方程和湍流模型等。本文创新点在于根据这些理论利用Fluent软件建立厂房内甲醛意外泄漏扩散模型。从第三章开始以实际的某工作现场为研究对象，使用专业的Fluent前处理软件Gambit软件对厂房几何建模，并对它进行网格划分和定义边界类型。然后导入Fluent软件，通过求解器选择、设置控制方程和湍流模型以及相关参数，进行模拟计算，得到可视化图形，截取10分钟和15分钟时的状态，对人的最高呼吸高度Z=1.6m进行分析，并根据图形和甲醛的毒理性对毒害区域进行分析，以及对甲醛泄漏后应急处理方法提建议。最后，对全文工作进行总结，，并对后续展望探讨。
[Abstract]:The rapid development of industry is accompanied by the use, production and storage of hazardous substances. Once an accident occurs, it will cause great losses to the society. Therefore, it is of great significance to study the law of leakage and diffusion of dangerous gases. It is also an important subject in the field of occupational health and safety science. On the basis of this background, this paper summarizes and analyzes the present research situation, the mechanism of gas diffusion and the factors affecting the diffusion at home and abroad. The development of gas leakage diffusion models is introduced, including physical experiments, mathematical simulation and CFD numerical simulation. Then, the software development and application based on these models are summarized. In this paper, the Fluent software based on CFD (computational fluid dynamics) method is introduced in detail, as well as some basic governing equations and turbulence models used in the software. The innovation of this paper lies in the establishment of accidental formaldehyde leakage and diffusion model in factory building by using Fluent software according to these theories. Beginning from the third chapter, a practical work site is taken as the research object. In this paper, we use Gambit software, a professional Fluent pre-processing software, to model the geometry of the workshop, mesh it and define the boundary type. Then we import the Fluent software and set up the governing equation, turbulence model and related parameters by selecting the solver. Through simulation, the visualized graph was obtained, the state of 10 minutes and 15 minutes was intercepted, the highest respiratory height of human was analyzed, and the toxic area was analyzed according to the toxicity of the graph and formaldehyde. And to the formaldehyde leakage emergency treatment method proposed. Finally, the full text work is summarized, and the follow-up prospects are discussed.
【学位授予单位】：首都经济贸易大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：R134.2

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