办公建筑室内污染物浓度场数值模拟研究

发布时间：2018-04-18 01:29

本文选题：数值模拟 + CFD　；参考：《重庆大学》2013年硕士论文

【摘要】：目前，CFD（Computational Fluid Dynamics）技术已成为研究建筑室内环境的主要方法之一。然而，针对室内污染物扩散模拟专用软件相对较少，而已有较成熟的CFD商业软件不但价格昂贵，，而且要求使用者具有较强的专业知识和理论基础，因此，开发完善一套具有低成本、易推广、速度快的CFD可视化模拟软件具有较高的科研价值。首先本文从室内污染物的扩散模型以及关键参数入手，分析了流体流动和传热基本控制方程，确定了核心计算程序的控制方程离散和求解方法；运用CompaqVisual Fortran6.6和VB.NET进行混合编程，改进了建筑室内热环境仿真软件Indoor Thermal Environment Simulation1.0（简称ITES1.0），开发了具有模拟室内污染物浓度分布功能的ITES2.0；并以重庆市某办公建筑为实例，采用现场实测和问卷调查相结合的方法，验证了ITES2.0的可信性，主要研究成果如下： ①对ITES1.0核心程序源代码进行了改进，引入了用于模拟甲醛和CO2的组分方程模型，开发了具有模拟室内污染物浓度分布功能的仿真软件ITES2.0。 ②改进ITES1.0的前处理，实现了设置面板多级撤销、模型多维度旋转等操作，提供了能编辑污染物物性参数的设置面板，添加了简单明了的工具栏快捷命令按钮，提供了能快速掌握ITES2.0的帮助文档。 ③根据CFD数值模拟后处理可视化软件TECPLOT360的无结构数据格式，编写代码输出数值模拟结果，最终实现对建筑室内热环境的仿真软件ITES2.0整体优化过程。 ④通过实例测试了重庆市某办公建筑室内甲醛、CO2、温度、相对湿度、气流速度以及问卷调查了室内人员的主观感受。从主观和客观上对ITES2.0进行可信性验证，结果表明：模拟值和实测平均值不存在显著差异，即模拟值和实测值的趋势较为一致；将已验证的模拟值进行灰色关联分析评价室内空气品质的等级，结果表明：灰色评价等级与主观问卷调查结果相吻合，验证了数值模拟结果与主观问卷调查结果的一致性。
[Abstract]:At present, the technology of Computational Fluid Dynamics has become one of the main methods to study the indoor environment of buildings.However, there are relatively few special software for indoor pollutant diffusion simulation, and mature CFD commercial software is not only expensive, but also requires users to have strong professional knowledge and theoretical basis.Developing and perfecting a set of CFD visual simulation software with low cost, easy popularization and fast speed has high scientific research value.In this paper, the basic governing equations of fluid flow and heat transfer are analyzed, and the discretization and solution method of the control equations of the core calculation program are determined, and the mixed programming with CompaqVisual Fortran6.6 and VB.NET is carried out, which is based on the indoor pollutant diffusion model and the key parameters.The thermal environment simulation software Indoor Thermal Environment simulation 1.0 (ITES1.0 for short) is improved to develop ITES2.0 with the function of simulating the concentration distribution of indoor pollutants, and taking an office building in Chongqing as an example, the method of field measurement and questionnaire survey is adopted.The credibility of ITES2.0 is verified, and the main research results are as follows:1. The source code of ITES1.0 core program is improved, the component equation model for simulating formaldehyde and CO2 is introduced, and the simulation software ITES2.0 is developed, which can simulate the distribution of indoor pollutant concentration.(2) improve the pre-processing of ITES1.0, realize the operation of setting panel multi-level undo and model multi-dimension rotation, provide the setting panel that can edit the physical property parameters of pollutants, add simple and clear toolbar shortcut command button, etc.Provides help documentation to quickly master ITES2.0.3According to the unstructured data format of TECPLOT360, a post-processing visualization software for CFD numerical simulation, the code is compiled to output the numerical simulation results. Finally, the whole optimization process of the simulation software ITES2.0 for indoor thermal environment is realized.(4) the indoor formaldehyde CO2, temperature, relative humidity, airflow velocity and the subjective feelings of the indoor personnel were tested through an example of an office building in Chongqing.The credibility of ITES2.0 is verified subjectively and objectively. The results show that there is no significant difference between the simulated value and the measured average value, that is, the trend between the simulated value and the measured value is consistent.The grade of indoor air quality is evaluated by grey correlation analysis. The results show that the grey evaluation grade is consistent with the subjective questionnaire results, and the consistency between the numerical simulation results and the subjective questionnaire results is verified.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU834

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