WIND TUNNEL EXPERIMENTS ON WIND PRESSURE AND AIR FLOW DISTRIBUTION BY USING VARIOUS ARRANGEMENTS OF BUILDING MODELS

点击翻译按钮获取中文摘要

This report describes wind pressure on the walls and air flow distribution around buildings on the basis of wind tunnel experiments by using two kinds of building model: apartment houses with 5-10 stories and 2-storied detatched houses on a scale of 1/400 and 1/100, respectively. Models were regularly arranged on the floor of the wind tunnel with a section of 1.5mx1.5m, in various combinations of parameters, such as wind direction, width of the street, rate of building volume to lot, etc.It is shown that the absolute value of wind pressure coefficient on the wall decreases as the rate of building volume to lot increases. These results were compared with those already reported.Another purpose of this report is to apply the experimental results on wind pressure and air flow distribution to estimation of thermal environments in a cross-ventilated room of an apartment house and in the cavity between the buildings in terms of SET^*, ASHRAE's Standard New Effective Temperature. SET^* was calculated both in the room and in the cavity, using Standard Meteorological Data of three districts of Sapporo, Tokyo and Kagosima and related to the rate of building volume to lot, orientation of buildings, wind direction, etc. Moreover, the effect of ground coverages, i.e., bare ground, asphalt pavement and lawn, on the outdoor thermal environment is examined.