西安工程大学学报2025，Vol.39Issue(5)：59-65,7.DOI:10.13338/j.issn.1674-649x.2025.05.007
热压驱动下街谷内污染物扩散的模拟
Simulation of pollutant dispersion in street valleys under thermal pressure
摘要
Abstract
To investigate the diffusion characteristics of pollutants in single and multi-street val-leys under the effect of thermal pressure,as well as the influence law of the peak position of the street valley on the flow field within the street valley,the simulation of the radiation situation of the sunlit side of the building in actual circumstances was carried out.Through fitting the temper-ature change curve of the transition zone between the sun radiation area and the shadow area,the flow field,temperature,and pollutant distribution within the street valley under the action of ther-mal pressure were analyzed.The results show that with the temperature difference rising from 5 K to 30 K,the concentration of pollutants in the center of the single street valley gradually de-creased by about 30%.The distribution of pollutants in multi street valleys is affected by conver-gent flow.When the number of street valleys increased from 3 to 10,the pollutant concentration in the left street valley significantly increased,with the maximum increase approaching 40%,while the pollutant concentration in the right street valley decreased.The position of valley peak has a guiding effect on convergent flow,thus affecting the diffusion performance of pollutants in street valleys.关键词
计算流体动力学(CFD)/污染物扩散/太阳辐射/风热环境Key words
computational fluid dynamics(CFD)/pollutant dispersion/solar radiation/wind and thermal environment分类
建筑与水利引用本文复制引用
赵志翔,张震,靳永辉..热压驱动下街谷内污染物扩散的模拟[J].西安工程大学学报,2025,39(5):59-65,7.基金项目
国家自然科学基金(52206223) （52206223）
