wind

The quantity of air in several rooms lying in a stack connected by means of fresh air and exhaust air ducts is considered as a simple model of amultistorey building. Negative pressures set up within the rooms can be equalised by adjusting the

Spatio-temporal measurements of a fluctuating pressure field acting on the side faces of a square prism of finite height in boundary-layer flows are presented for a zero degree angle of attack. Two typical neutral atmospheric flow conditions

Wind pressures on three Navy buildings at the Kanehoe Marine Corp Air Station, Hawaii were measured. Indoor and outdoor variables were also measured including temperature, dry bulb, wet bulb, relative humidity, wind speed, and wind direction. Pressure measurements were carried out using Validyne DP103 pressure transducers, and a static pressure probe. Natural ventilation is estimated 1. by combining window areas and pressure coefficients with wind speed and 2. using the LBL infiltration model.

Shows the results of a study of the effects of turbulence upon ventilation. Controlled fluctuating air flows were directed upon openings in the side of acube simulating a building. The relationship between the turbulent characteristics of the air flow and the ventilation rate in the building modeare examined. Mean windspeed and the turbulent velocity and intensity of the air flow were measured with a thermocoupled anemometer. Resulting ventilation rates were measured by means of tracer gas decay, using CO2 as the tracer and an infra red analyser to monitor the decrease in concentration.

Instruments full-scale agricultural and horticultural buildings with surface pressure sensors to measure wind loads under natural wind conditions. To show the effect of building geometry on wind loads, presents results of pressure coefficients on a selection of these buildings. The results in this report relate to transverse wind direction only. Shows that wind load does not reduce to a function of the geometric variables of height/span and roof pitch.

Natural ventilation can be used to reduce cooling loads and increase human comforts in buildings in hot humid climates. Airflow rates are determined by the wind pressure on the faces of the building and the amount of open area. Describes wind pressure coefficient measurements made on 2 buildings at theKaneohe Marine Corps Air Station on the island of Oahu, Hawaii during summer 1982. These full scale measurements will be compared to reduced-scale measurements made of the boundary-layer wind tunnel at the Naval Civil Engineering Laboratory.

When wind and mechanical ventilation effects work together simultaneously, the combined effects of the two cannot be given by simple linear summation. Investigates this non-linearity of pressure differentials by the wind tunnel test of a model building, and verifies its effect on air infiltration.

Describes an analytical model for the prediction of ventilation rates and internal temperatures as influenced by the combined effects of heat dissipation inside industrial buildings and natural wind action. Applies this to a two span low building equipped with a natural ventilation system. Results emphasize the relative importance of thermal and dynamic variables including wind incidence, terrain roughness, and the role of the opening in the internal partition wall.

Describes a comprehensive investigation undertaken to determine the wind pressures on surfaces of models of typical low-rise buildings. For many practical applications building surfaces like facade coverings or tiled roofs are permeable. For those coverings the pressure equilibration across thepermeable surface is important when determining the net windload. Gives a survey of the physical parameters influencing the windload of permeable surface coverings. Presents results of a continuing study of the wind load on permeable facade coverings.

Performs tracer gas measurements and fan pressurization experiments on an 8-storied student residential building in order to determine the influence of wind as well as of stack effect upon air infiltration. Compares pressure and tracer gas distributions with those from a predictive infiltration computer model for high rise buildings.