A WIND TUNNEL TEST OF PRESSURE DISTRIBUTIONS ON BOX-SHAPED MODELS

Wind pressure distributions on the surface of a rectangular cylinder model were measured inthe smooth and turbulent flow. Experiments were also made on box-shaped models with squaresection. It was observed in two dimentional model test that wind distributions on the surfaceswhere reattachment of seperating flow occurred were affected by turbulence. In three dimensionaltest, suction on the roof surface became more uniform with increasing of height of the model. Inthe case that the wind direction was not vertical to the windward surface, the pressure distributionswere remarkably dependent on the wind directions. When the wind direction was 45 to the wallvortices could not be seen on the side walls, while alternative pressure fluctuations were observed onthe roof.Wind pressure distributions on the surface of a rectangular cylinder model were measured inthe smooth and turbulent flow. Experiments were also made on box-shaped models with squaresection. It was observed in two dimentional model test that wind distributions on the surfaceswhere reattachment of seperating flow occurred were affected by turbulence. In three dimensionaltest, suction on the roof surface became more uniform with increasing of height of the model. Inthe case that the wind direction was not vertical to the windward surface, the pressure distributionswere remarkably dependent on the wind directions. When the wind direction was 45 to the wallvortices could not be seen on the side walls, while alternative pressure fluctuations were observed onthe roof