排気ガスの大気乱流拡散-III

概要

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In order to survey the distribution of the gas intensity in a line source formed by the exhausted gas of the car traffic, a wind tunnel test with respect to the turbulent field in the wake of car models and a calculation of the gas concentration in the wake are made, showing that the extent of the source formed by a car is practically of the dimension of the car itself.Furthermore, the gas distribution in a deep ditch is obtained by solving the equation of diffusion under some assumptions on boundary conditions at the both sides and the bottom which correspond to the buildings on the street and the road respectively. A measurement in the case of CO gas is made on several streets. It is shown that the concentration of CO gas in the street is affected by the direction of the wind and it is higher at the windward side of the street. And a calculation with proper parameters is shown to give fairly similar tendency to the measurement.
独立行政法人海上技術安全研究所の論文
1969-11-15