Describes series of wind tunnel investigations leading to development of a procedure for estimating wind pressure forces on low-rise building which is part of a large group of similar buildings. Procedure takes account of geometrical form of building, spacing of buildings, direction of wind and upstream fetch conditions. Gives estimated value as pressure coefficient which may be determined graphically.
Reports project to measure wind pressures on low-rise buildings. Describes site and houses in the estate selected for investigation. Gives details of an associated experimental building. Outlines positioning of the pressure transducers andgives details of the cabling and the reference pressure system. describes velocity measurement, recording equipment and methods of calibration, processing and analysis. Gives details of records taken in tabular form.
Wind tunnel test conducted on a scale model of a classroom show that, provided the test air speed is kept in excess of about 3mph, it is feasible to use models for predicting, with good accuracy, the air-flow conditions in and around full-scale buildings. In the case of low-pitch roofs the height of the stagnant zone set up as a result of flow separation occurring at the windward eaves of a building is influenced by wall height rather than by roof pitch.
Reviews existing methods for the prediction of infiltration rates and the factors influencing the pressure difference across buildings. Describes experimental procedure used in tests conducted in wind tunnel. Discusses results and presents prediction technique which enables surface pressures acting on aparticular building situated within an array of similar low rise buildings to be estimated, procedure takes account of the geometrical form of the building spacing parameters describing the array, direction of the wind and the upstream fetch conditions.
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