建筑物对高架点源大气污染物扩散影响的模拟研究  

Simulation study on effects of building on diffusion of air pollutants from high elevation point sources

作　　者：陈义胜[1] 庞赟佶[1] 李琛[2] 崔小超[1] 

机构地区：[1]内蒙古科技大学能源与环境学院,包头014010 [2]陕西理工学院化学与环境科学学院,汉中723001

出　　处：《环境工程学报》2010年第1期147-150,共4页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50564001)

摘　　要：运用数值方法对城市中高架点源排放大气污染物的扩散规律进行了模拟研究,在计算区域内建立了三维数学模型,并将拉格朗日法描述的颗粒轨道模型耦合到风场。本研究计算了地面风速为3 m/s时的大气流场,并模拟研究了该风场条件下气体污染物的扩散和固体颗粒污染物的运动轨迹。通过分析模拟结果,给出了高架点源中排放的气体污染物的扩散区域和固体颗粒污染物运动轨迹的变化规律。Diffusion law of air pollutants emitted from high chimney emission sources was simulated by using numerical methods, three-dimensional mathematical model was built in research area. particle trajectory model that lagrangian method described coupled to wind field. In this paper atmospheric flow field was calculated when the surface wind speed was 3 m/s,under the condition of this wind flow, gaseous pollutant diffusion and motion trajectory of particle pollutants were studied. Through analyzing the results of simulation, the change law was obtained about diffusion region of gaseous pollutant diffusion and motion trajectory of particle pollutants.

关 键 词：大气流场 气体污染物扩散 颗粒运动轨迹 

分 类 号：X51[环境科学与工程—环境工程]