Investigates a rational method of utilizing recent improvements in wind tunnel techniques and meteorological data, to estimate potential wind-generated air flow through housing in hot humid climates. The method uses mean pressure differences obtained from solid wind tunnel models together with appropriate discharge coefficients for rectangular openings. Changes in pressure distributions due to typical openings through models indicated that the use of pressure data from solid models results in errors similar to those associated with the local wind data.
Compares full-scale pressure coefficients obtained from a 57-storey building in Toronto with wind tunnel results for tests in the 9m by 9m wind tunnel at the National Research Council of Canada. Demonstrates good agreement where sufficient full-scale data exists. Proposes a method of treating peak pressures based on the fit of an exponential distribution to a population of "significant independent events", called pressure spikes. This distribution provides a good fit to both full-scale and wind tunnel results, which generally agree.
Describes further experiments from the wind tunnel simulation of wind pressures on the Aylesbury housing estate. These experiments are not concerned with the acquisition of further data, but are designed to examine the validity of measurements.< Discusses the effect of varying observation and averaging times. Reports results of experiments, varying these times, but finds no observable trends in the dispersion results.
Reports root mean square and extreme pressure measurements made on a model of the Aylesbury housing estate in the Oxford wind tunnel. Also presents a complete set of measurements on the test house alone, corresponding to the varied roof pitch records. Presents extreme value data in the form of a Fisher-Tippett type probability function.< Discusses design of the experiments, experimental procedures and results. Gives 47 tables comparing full scale with wind tunnel results. Includes results of wind tunnel measurements made at Bristol University.
The open ridge is a ventilator commonly used in cattle buildings. Reviews literature on the open ridge. Finds that there is outright disagreement between the sources referenced. Describes wind tunnel study to show whether or not the ridge design could influence the pressure coefficients when subject to wind. Finds there is no practical difference in pressure coefficients generated at the ridge of a building whether there are no upstands, upstands alone or with caps. For a 0deg.
Reports a program of research in progress at the Colorado State University to determine the surface pressures on building models immersed in a simulated atmospheric flow. Pressure data on a model building is taken from 272 tappings and reduced to pressure coefficients. Reports pressure coefficient measurements have been completed for 23 building/boundary layer combinations.
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