Wind-tunnel study of concentration fields in street canyons |
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| Affiliation: | 1. Department of Environmental Atmospheric Sciences, Pukyong National University, Busan, South Korea;2. School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea;1. School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, PR China;2. Institute of Earth Climate and Environment System, Sun Yat-sen University, Guangzhou, PR China;3. Atmospheric Modeling and Analysis Division, National Exposure Research Laboratory, US Environmental Protection Agency, Research Triangle Park, NC 27711, USA;4. Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, University of Salento, S.P. 6 Lecce-Monteroni, 73100 Lecce, Italy;1. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong;2. Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei, 106, Taiwan, ROC |
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| Abstract: | The paper presents results from a case study of gaseous pollutant dispersion in street canyons. Tracer-gas experiments were performed in a neutrally stratified wind tunnel. Vehicle emissions were simulated as line sources. Concentration profiles along building walls were measured. A two-dimensional street canyon was considered as the reference case. The influence of systematic parameter variations on the concentration field is studied and discussed. Building dimensions, upwind building configuration, wind direction and roof geometry were found to be important parameters. Data sets from the study may be used for evaluation of numerical models and for expert estimates of air quality in the urban environment |
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