抄録
The authors discribe a series of wind tunnel investigations on natural ventilation forces upon apartment houses which are arranged in a group in this paper. In this case, the group form is more important than the single model building form in influencing the drag forces experienced by each building. In these experiments, authors investigate the mean wind pressure difference between the windward and the leeward faces of a model building, varying the array pattern, the height of model buildings, the pitch of model buildings and the direction of the wind. Conclusions are summarized as follows : (1) Above two times as high as the building height, the profiles of mean wind speed and turbulence intensity over model buildings agree with those of the approaching wind. (2) The greater rate of building volume to lot, the smaller the mean wind pressure difference across the building. (3) In case of the Low-rise buildings, the mean pressure differences in the normal arrangement are greater than in the staggered. (4) The height of buildings and the incident angle of the approaching wind influence the natural ventilation forces.
