复杂建筑物近场扩散的风洞模拟  

Wind Tunnel Simulation of Flow and Dispersion around Complex Buildings

作　　者：姚仁太[1] 乔清党[1] 俞学曾[1] 郝宏伟[2] 

机构地区：[1]中国环境科学研究院,北京100012 [2]中国辐射防护研究院,太原030006

出　　处：《辐射防护通讯》2002年第3期1-6,共6页Radiation Protection Bulletin

基　　金：山西省自然科学基金 ( 2 0 0 0 1 0 30 )

摘　　要：介绍了在风洞中采用雷诺数自准准则作为动力相似的判据对一特定建筑物布局的模拟试验。风洞实验采用 1∶ 2 0 0的缩比模型 ,较好地模拟楼顶通风口排放。实验表明 ,建筑物对污染物弥散的影响是非常复杂的 ,不仅表现出非均匀、非定常特征 ,而且随着建筑物布局的改变和风向的变化 ,这种影响也是各异的。A wind tunnel simulation for buildings with specified geometrical shape is described in this paper, with model scale of 1∶200. The good simulation of emission from many small air vents on the top of buildings is obtained. As for dynamic similarity criterion, the building Reynolds number auto-adaptation is adopted in the experiment. The effects of buildings on pollutant dispersion are very complex and are not only provided with the characteristics of nonuniformity and unsteadiness and but also vary with building arrangement and wind direction. The effects are also anisotropic. It is shown that wind tunnel simulation is a powerful tool for investigating this kind of turbulent diffusion with micro-scale.

关 键 词：近场扩散 建筑物 风洞模拟 大气污染 大气扩散 风洞试验 

分 类 号：X169[环境科学与工程—环境科学]