局所排出換気回数に関する超過確率に基づく風環境評価の密集市街地モデルへの適用 : 市街地の風環境に関する研究(その2)

概要

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The present study aims to estimate the minimum requirements for residential houses from the air quality point of view. Three typical models of a high-density built-up area were considered and numerical simulations were carried out in order to examine the effects of the geometry of such models on wind flow characteristics, which in turn affect the air quality, within the pedestrian domain of a street located within this area. The calculated flow fields were employed to estimate local air change rates which were used to compute the probability of exceeding the local air change rate which is calculated at the reference conditions of the considered location. The present study has been applied on the most famous 9 cities in Japan: Sapporo, Sendai, Niigata, Tokyo, Yokohama, Nagoya, Kyoto, Osaka, and Fukuoka based on their mean wind velocity data. The results demonstrated that the exceedance probability analysis of the pedestrian wind environment is very useful in the evaluation of pollutants removal efficiency by the applied wind. Also, the calculated probabilities showed large dependency on both the geometry of building arrays and the wind conditions of the 9 cities.
社団法人日本建築学会の論文
2008-12-30