| 摘要: |
| 商业区建筑结构日益复杂，严重影响建筑群通风和周围气体污染物的扩散，选取重庆一商业区建筑群作为研究对象，以三维湍流模型为基础，采用CFD软件对商业区建筑的通风能力以及周围连续排放的气体污染物扩散情况进行数值模拟，对比分析基于气象条件的天变化和季节变化对建筑群通风能力和污染物扩散在水平方向和竖直方向的影响；分析得到建筑群通风能力和污染物扩散速率与大气混合层高度正相关；研究结果可为改善建筑通风效果和降低建筑周围污染物浓度提供参考。 |
| 关键词: 数值模拟 商业区建筑群 大气混合层高度 城市通风 污染物扩散 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Effect of Atmospheric Mixing Layer Height on Ventilationand Pollutant Diffusion |
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MAO Wei wei, ZHANG Fu ren
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| Abstract: |
| The structure of commercial district buildings becomes more and more complicated and seriously affects the ventilation and the pollutant diffusion of surrounding buildings. By taking a building group of a commercial district of Chongqing as research object, based on three dimensional turbulence model, this article uses CFD software to conduct numerical simulation on the ventilation capacity and the diffusion of continuous emission air pollutants of the building group, comparatively analyzes the impact of meteorological condition change and seasonal change on the ventilation and the pollutant diffusion of the building group on horizontal and vertical direction, and obtains that there is positive relation between the atmospheric mixing layer height and the ventilation capacity and pollutant diffusion rate of the building group. The research results can provide the reference for improving building ventilation effect and reducing pollutant concentration of the surrounding buildings. |
| Key words: numerical simulation building group of a commercial district atmospheric mixing layer height urban ventilation pollutant diffusion |
