商业街区可吸入颗粒物空间分布及其气象要素的相关性  

Spatial Distributions of Inhalable Particulate Matter in Commercial Zone and Their Relevance with Meteorological Elements

作　　者：李绥[1] 杨二东 石铁矛[1] 朱蕾[1] 邹惠芬[2] 

机构地区：[1]沈阳建筑大学建筑与规划学院,辽宁沈阳110168 [2]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2014年第5期923-930,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51208312);国家科技支撑计划项目(2012BAJ15B06);辽宁省高等学校杰出青年学者成长计划资助项目(LJQ2013064)

摘　　要：目的研究沈阳市太原街商业街区可吸入颗粒物与湿度、风速等主要气象要素的相关性及其在不同水平截面和垂直断面处的分布规律.方法以太原街多时相监测数据为基础,采用SPSS Statistics分析了街区可吸入颗粒物平均质量浓度与湿度、风速等气象要素的相关性,采用Fluent软件,模拟街区内不同水平截面与不同街道断面的流场与颗粒物浓度场.结果商业街区可吸入颗粒物质量浓度变化在一定阈值范围内与湿度正相关与风速负相关.街道两侧建筑由于高度、形态与密度差异,形成了不同特性的街谷局部流场,对可吸入颗粒物扩散效果具有较大影响.结论在建筑容积率一定的情况下,通过调整裙房的屋顶形态及其与高层建筑的组合关系,能够改善可吸入颗粒物的扩散效果.To improve diffusion of inhalable particles, this paper researched the relevance between concentration of inhalable particulate matter and meteorological elements （such as humidity and wind speed）in a commercial zone of Shenyang as well as the flow field distribution of inhalable particulate matter on different horizontal and vertical sections. Based on the monitoring data of in- halable particulate matter and the meteorological data in Taiyuan street, using SPSS statistics, the relevance between concentration of inhalable particulate matter and meteorological elements in commercial zone was analyzed. With the help of software FLUENT, the flow field and particleconcentration was simulated. It is found when the humidity or wind speed is under a certain thresh- old, the concentration of inhalable particulate matter is positively related with the humidity, but negatively related with the wind speed. Because of differences in heights, shapes and densities of buildings, under certain meteorological conditions, the street canyons form different local flow fields which have a great influence on diffusion of inhalable particles. It concludes that under a cer- tain building volume rate, adjusting the roof formulation of podium and high - rise building combi- nation can improve the diffusion of inhalable particles.

关 键 词：可吸入颗粒物 气象要素 相关性 数值模拟 空间分布 商业街区 

分 类 号：X513[环境科学与工程—环境工程]