摘要
随着中国城市汽车保有量的逐年增多,城市中心街区内的空气质量不断恶化。通过CFD数值模拟研究了不同风速、不同开窗率对街区污染物扩散的影响。结果表明,风速增加会降低目标街区迎风面和背风面的污染物浓度,其中背风面污染物浓度降低更多;开窗区域的存在对街区污染物的移除有积极的影响,随着开窗率的增加,迎风面与背风面污染物浓度均有所降低。此规律可为城市建设提供参考,有效疏散街区污染物,降低对人体的危害。
With the increase of car ownership in cities in China, the air quality in urban central districts deteriorates sharply. In this paper, CFD method was used to investigate the effects of different inlet wind speed and different window opening percentage on pollutant flow and dispersion in blocks. The results show that the increase of the inlet wind speed will reduce the pollutant concentration on the windward and leeward wall of the target block, and the pollutant concentration on the leeward side will decrease more. The existence of the windowing area has a positive impact on the removal efficiency of pollutants in the block. With the increase of the window opening percentage, the pollutant concentration on the windward and leeward sides will decrease.The research can provide reference rule for the pattern of the city.Evacuate pollutants in the block timely and effectively, and reduce the harm to the human body.
作者
刘红姣
熊孝鹏
石零
晋梅
Liu Hongjiao;Xiong Xiaopeng;Shi Ling;Jin Mei(Hubei Key Laboratory of Industrial Fume and Dust Pollution Control,Jianghan University,Wuhan 430056,China;Shenzhen Megmeet Electric Co.,Ltd.,Wuhan 430072,China)
出处
《环境科学与管理》
CAS
2019年第12期45-48,共4页
Environmental Science and Management
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)
关键词
街区
开窗率
风速
污染物浓度
数值模拟
street canyon
pollutant concentration K
wind speed
window opening percentage
numerical simulation
作者简介
刘红姣(1970-),女,副教授,主要从事流体输送、混合物分离模拟等方面的教学与科研工作。
