高架覆盖采风口型街谷内PM2.5分布模拟  

Distribution of PM2.5 in Street Canyon with Air Intake Covered by Elevated Road

作　　者：翟静[1] 赵敬德[1] 冯寒立 ZHAI Jing;ZHAO Jing-de;FENG Han-li(College of Environmental Science and Engineering,Donghua Universit)

机构地区：[1]东华大学环境科学与工程学院

出　　处：《建筑热能通风空调》2018年第10期40-43,71,共5页Building Energy & Environment

基　　金：上海市自然科学基金(13ZR1401500)

摘　　要：本文对有高架覆盖和无高架覆盖下30 m采风口型街谷内PM2.5的分布进行了三维数值模拟。提出一种新的评价方法,分析了高架路的存在对街谷内颗粒物浓度分布的影响。结果表明:高架路的存在会增大颗粒物的浓度,阻碍颗粒物向街谷外部扩散,颗粒物浓度增加率为20%左右。The three-dimensional numerical simulation of distribution of PM2.5 in two kind street canyons with 30 meters air intakes was carried out. The difference between two types of street valleys is whether there is elevated road coverage.A new evaluation method is proposed to analyze the influence of elevated road on concentration distribution of particles in street valley. The results show that the presence of elevated roads increases the concentration of particulates and prevents particles from diffusing into the exterior of street valley. The increase rate of particle concentration was about20%.

关 键 词：高架路 街道峡谷 采风口 CFD模拟 PM2.5 

分 类 号：X513[环境科学与工程—环境工程]