摘要:装修材料日益广泛应用造成室内空气严重污染,而甲醛是室内空气污染危害最常见且最严重的污染物之一。合理的通风方式和通风速度对室内甲醛浓度的有效控制显得尤为重要。本文主要通过计算流体力学仿真的形式,利用ANSYS,ICEM CFD,以及FLUENT等软件对室内污染物的扩散进行数值模拟,即通过建模,划分网格,设置边界条件,利用组分传输模型和标准k-ε模型,模拟同侧通风与异侧通风两种基本通风方式下室内气流组织的流动形式,得到甲醛污染物在室内通风状态下不同位置的速度分布云图,压力分布云图,质量密度分布云图,研究了不同通风方式、不同送风速度对室内甲醛的浓度分布的影响,数值模拟表明:异侧通风局部排除甲醛效率更好,同侧通风对整体影响更均匀,送风速度与甲醛浓度成反比。 87612
本文为室内通风设计和气流组织的研究提供一定的理论依据。并通过分析得到有关甲醛室内扩散对于人体危害程度与通风以及位置的关系,对现阶段装修材料的使用以及家具的摆放位置进行有效建议。
毕业论文关键词:数值模拟,甲醛,污染物浓度,FLUENT
毕业设计说明书外文摘要
Title Computational fluid dynamics simulation of indoor formaldehyde pollutant dispersion
Abstract Because of the use of decoration materials,the air is polluted。 It is important to choose a good way to ventilate and the velocity of air。 In this paper, the main content is the numerical simulation of pollutant dispersion of indoor formaldehyde by using ANSYS, ICEM CFD, and FLUENT。 Through modeling, meshing, boundary conditions, using the component transmission model and the standard k-ε turbulence model, simulating the gas flow between the Ventilation in the same direction and different direction。 We obtain the velocity distribution cloud pictures, the pressure distribution and the mass density distribution of the formaldehyde pollution in the indoor air。 The effects of different ventilation modes and different air supply velocity on the concentration distribution of formaldehyde in indoor air were studied。 Numerical simulations show the efficiency of different side ventilation is better, and the overall effect is more uniform, and the rate of air supply is inversely proportional to the concentration of formaldehyde。 This paper provides a theoretical basis for the study of indoor ventilation design and air flow organization。 And through the analysis of the relationship between the degree of harm to the human body and the location of the indoor air, the use of the decoration materials and the position of the furniture to make effective recommendations。
Keywords : Numerical Simulation, Formaldehyde, The concentration of pollutants,FLUENT
目 次
1 绪论1
1。1 课题背景及意义1From+优|尔-论_文W网wWw.YouErw.com 加QQ752018.766
1。3 主要研究内容及方法3
2 室内甲醛污染物扩散的理论基础4
2。1 CFD控制方程4
2。2 CFD基础知识7
2。3 FLUENT软件介绍及计算步骤9
3 室内甲醛污染物扩散数值模拟计算的设置12
3。1 室内模型的建立与简化12
3。2 模拟中各项参数的确定12
4 室内甲醛污染物扩散模拟结果及分析15
4。1 异侧通风模拟结论分析15
4。2 同侧通风模拟结论分析16
结论 19
致谢 20
参考文献21
绪论
1。1 课题背景及意义源-于,优+尔^论=文.网wwW.yOueRw.com 原文+QQ752.018766