Wind Tunnel Model Investigation for Basic Dwelling Geometries.

摘要

Wind pressures measured on a full-scale low-rise building are compared with results obtained from a 1/70scale model placed in a turbulent boundary layer which simulates the atmospheric surface layer in a low speed wind tunnel. Simulation of the turbulence in a short test-section wind tunnel can be achieved with spires and large upstream roughness elements. Duplication of the mean velocity profile and geometric scaling of the upstream roughness do not provide the proper simulation of the turbulence. The statistical parameters representing the fluctuating roof pressures for model and full-scale were compared for two data runs. In general it can be concluded that the pressure fluctuations can be modelled to an acceptable degree of accuracy. Pressure measurements were made on models of varying geometry for wind approach angles between zero and 360degrees. Models with gable roofs with slopes of 0, 10, 20and 30degrees and with two different length to width ratios (L/W = 1.2and 2.0),and with eaves and without eaves and with two different height to width ratios representing single and two-story dwellings,were tested.