街道峡谷内空气流动和污染物扩散研究  

Study on Air Flow and Pollutant Diffusion in Street Canyons

作　　者：刘红姣[1] 熊孝鹏 晋梅[1] 石零[1] LIU Hong-jiao;XIONG Xiao-peng;JIN Mei;SHI Ling(Hubei Key Laboratory of Industrial Fume and Dust Pollution Control,Jianghan University,Wuhan Hubei 430056,China;不详)

机构地区：[1]江汉大学工业烟尘污染控制湖北省重点实验室,湖北武汉430021 [2]深圳麦格米特电气股份有限公司,广东深圳518000

出　　处：《环境科学导刊》2020年第3期40-43,共4页Environmental Science Survey

基　　金：江汉大学工业烟尘污染控制湖北省重点实验室开放基金项目(HBIK2018-06)。

摘　　要：通过CFD数值模拟方法研究了街道峡谷中斜屋顶建筑在不同风速、不同开窗率时污染物流动与扩散的规律。模拟结果表明,斜屋顶街道峡谷中的空气涡流主要集中在背风面和迎风面的顶部,迎风面的污染物浓度指数远小于背风面的污染物浓度指数。提高风速和增大开窗率整个峡谷流动旋涡有减小和消失的趋势,街道峡谷中背风面的污染物浓度指数下降明显。开窗和提高风速有利于污染物的移除。For slated roof shape in the street,the effects of different wind speed and different window opening percentage on the flow and diffusion of pollutants were studied by CFD numerical simulation. The results showed that the air vortices in the canyon were mainly concentrated on the top of the windward and leeward surfaces. The pollutant concentration index on the windward side was much less than that on the leeward side. Increasing the wind speed and the window opening percentage would reduce the pollutant concentration and the flow vortex in the whole valley tended to decrease and disappear.

关 键 词：街区 开窗率 斜屋顶 污染物浓度 数值模拟 

分 类 号：X169[环境科学与工程—环境科学]