街道峡谷热力特征对局地臭氧生成传播影响的研究  

Study on the Influence of Thermal Characteristics of Street Canyon on Local Ozone Generation and Dispersion

作　　者：柳靖[1] 侯珂 LIU Jing;HOUKe(University of Science and Technology in Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学,北京100083

出　　处：《建筑科学》2023年第4期279-285,共7页Building Science

摘　　要：本文通过城市冠层模型、CFD模型与臭氧光化学反应模型进行耦合,形成了街道峡谷内的热力、动力和光化学反应同步模拟方法。以此为基础,采用数值模拟方法研究了街道峡谷热力特征对局地臭氧生成传播特征的影响。研究结果表明:在夏季典型日内,街道峡谷内空气温度与来流温度的差异对臭氧生成速率的影响并不显著;热力作用对臭氧浓度及分布的影响主要归因于自然对流对街道峡谷内气流结构的改变;热力作用对于臭氧局地分布特征的影响随着街道峡谷内高宽比的增大而增大。In this paper,through the coupling of the urban canopy model,CFD model and ozone photochemical reaction model,a synchronous simulation method of thermal,dynamic,and photochemical reaction in the street canyon was proposed.Based on this method,the influence of the thermal characteristics of the street canyon on the generation and dispersion of local ozone was studied by numerical simulation.The results show that the difference between inflow temperature and air temperature in the street canyon has no significant effect on the rate of ozone generation on typical days in summer.The influence of thermal factors on ozone concentration and distribution is mainly attributed to the change of airflow structure in street canyons caused by natural convection.The influence of thermal factors on the local distribution characteristics of ozone increases with the increase of height width ratio in the street canyon.

关 键 词：街道峡谷 热力作用 臭氧 数值模拟 

分 类 号：TU831[建筑科学—供热、供燃气、通风及空调工程]