市街地における建築物周辺気流の立体的構造に関する研究 : その 2. 低層建築物群中の高層建築物周辺気流の性状について

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Continued from the preceding paper (the same title, Part I.), several wind tunnel experiments were made to investigate the behavior of airflow in urban area. In that paper (Part. I.), the characteristics of airflow in the regularly arranged city-block models were studied. In this paper (Part. II.), it is investigated how the airfiow behaves around a high-rise building existed in regularly arranged low ones. As a result, following remarks may be made. Case A : A high-rise building stands in the center of regularly arranged low buildings. (The former is four times as high as the latter.) Case B : Only low buildings are arranged regularly. 1) In case A, the values of mean wind velocity (U) on the side of the high-rise building increase up nearly 2.8 time as many as those of case B. 2) In case A, the values of turbulent intensity (φ) are less than those of case B. 3) Wind profiles above the streets to which wind direction is at right angles are nearly conform to the log-law in upper part (z≥z_0) in case B. 4) Models used in the resent paper are eight times as large in volume as those of this paper, but the characteristics of wind distributions in both reports give generally the same tendency in quality. 5) The pattern of vertical distribution of Reynolds' stress (√<-<u'w'>^^^->)s that the value of √<-<u'w'>^^^-> is nearly constant area above mode lhight in case B. In that area, wind profile conforms to log-law as a whole. 6) On the street to which wind direction is at right angles, space correlation coefficients are generally large, and on that with which wind direction is in parallel, those are small. (Fig. 35〜37)
社団法人日本建築学会の論文
1976-08-30

市街地における建築物周辺気流の立体的構造に関する研究 : その 2. 低層建築物群中の高層建築物周辺気流の性状について

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