Influence of cetane improvers on the air quality in an urban street canyon |
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Authors: | Huang H Akutsu Y Arai M Tamura M |
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Institution: | Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113–8656, Japan |
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Abstract: | The concentration distributions of NOx, PM, HC and CO in an urban street canyon have been estimated using a two-dimensional air quality numerical model based on the k– turbulent model and the atmospheric convection diffusion equation when various cetane improvers were used in diesel fuels. A wind vortex can be found within the street canyon, and the pollutants emitted from the bottom of the street canyon tend to follow the course of the wind field, moving circularly. The addition of cetane improvers can improve the air quality in a street canyon, all of the pollutants were found to decrease with increasing centane number. |
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Keywords: | Street canyon Cetane improver Vehicle emissions Air quality |
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