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| 某居民住宅室内污染物扩散受温度影响数值模拟研究 |
| Numerical Simulation Study on the Influence of Temperature on the Diffusion of Indoor Pollutants in a Residential House |
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| DOI：10.16018/j.cnki.cn32-1650/n.202501003 |
| 中文关键词: 数值模拟 甲醛浓度 甲烷浓度 室内气流分布 |
| 英文关键词: numerical simulation formaldehyde concentration methane concentration indoor airflow distribution |
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| 中文摘要: |
| 为研究温度对室内污染物扩散特性的影响，以盐城市亭湖区某居民小区14层两室两厅住宅为研究对象，利用ANSYS Fluent数值模拟软件模拟不同室内温度下室内污染物扩散的浓度场和速度场分布情况。结果表明: 在室内温度为15~25 ℃时，温度升高对甲醛和甲烷气体的扩散均有促进作用，且两种污染物的扩散均有明显分层现象，具体表现为甲烷气体主要聚集在房间上部，最大质量分数可达到1. 8%，甲醛气体主要聚集在房间下部，最大质量分数可达到100%；随着温度升高，室内层高1. 2 m处各监测点平均甲烷质量分数由0. 19%上升至0. 29%，增大约0. 53倍，各监测点平均甲醛质量分数由79%上升至91%，增大约0. 15倍；相同温度下，甲醛浓度随高度升高呈递减趋势，甲烷浓度随高度升高呈递增趋势。 |
| 英文摘要: |
| In order to study the influence of temperature on the diffusion characteristics of indoor pollutants, a residential house with two bedrooms and two living rooms on the 14th floor of a residential community in Tinghu District, Yancheng City, was taken as the research object. The ANSYS Fluent numerical simulation software was used to simulate the distribution of the concentration field and velocity field of indoor pollutants under different indoor temperatures. The results show that when the indoor temperature is 15~25 ℃, the temperature increase can promote the diffusion of formaldehyde and methane gas, and the diffusion of both pollutants has obvious stratification phenomenon, which is manifested in that methane gas mainly gathers in the upper part of the room, with the maximum mass fraction reaching 1. 8%, and formaldehyde gas mainly gathers in the lower part of the room, with the maximum mass fraction reaching 100%. With the increase of temperature, the average methane mass fraction at each monitoring point at a height of 1. 2 m indoors increases from 0. 19% to 0. 29%, which is approximately 0. 53 times higher. The average formaldehyde mass fraction at each monitoring point increases from 79% to 91%, which is approximately 0. 15 times higher. At the same temperature, the concentration of formaldehyde decreases with the increase of height, while the concentration of methane increases with the increase of height. |
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