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 3 独立的建築物模型周辺気流の性状について

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Continued from the preceding papers (the same title, Part I, Part II), several wind tunnel experiments were made to investigate the behaviour of airflow around the building models standing on the flat plate. As a result, following remarks may be made. 1) The area where mean wind velocity is accelerated as compared with the case without models [the area of U^^-/U^^-_s<110(%)] increases as models become higher, and about one model, the area increases as the measuring plane (z) is higher (Fig. 6〜Fig. 13). 2) Airstream that flows over the models is comparatively small in quantity. 3) In the separation area, wind profiles are nearly conform to the log-law in cace the model height is low (Model 1, 5), but around tall models (Model 2, 3, 4), they are not necessarily conform to the law. 4) As to model depth (D), D has an effect on the wind velocity ratio (U^^-/U^^-_s) measured near the ground level, that is, U^^-/U^^-_s decreases as the model depth becomes smaller. 5) Air streams go down to the ground level before the models (down stream) and a small part of them flow upstream. In case a small model exists in front of the tall model, the velocity of that upstream flow increases and airflow rotates in the space between two models.
社団法人日本建築学会の論文
1976-09-30