Abstract
Following a previous report, experimental investigations were made concering the wind pressure around a one-gabled house in the three-dimensional flow.
The inclination angle of roofs and the ratio of the height to the width of eaves of a model house were the same as in the case of the two-dimensional flow.
In this report, the direction of the wind is considered in such a menner that it has angles from the direction perpendicular to the up-stream side. wall at 0°, 30°, 45°, 60° and 90° and these angles were namend ‘the wind direction angles’.
From the results of investigation the following conclusions were obtained.
(1) In the case where the ratio of the height to the width of the eaves is 0.23, the wind pressure distribution on the central section of the house of which the roof has an inclination angle of 20° is comparatively stable for all wind direction angles, i. e. in this case the local pressures are less than in the other cases.
(2) When the wind direction angle is near 45°, the wind pressure distribution around a house of which the inclination angle of roof is larger than 25°is apt to show unstability, i. e. a large suction pressure appears on the roof of the down-stream side.
(3) Considering all things the house is desirable to be constructed so as to receive the wind action from a direction parallel to the house axis as far as possible.
