wind pressure

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.

Describes a model that predicts air infiltration from both wind and temperature influence to within 20%. Compares the predicted value and measured infiltration from a full-scale test structure, revealing an average discrepancy of less than 10 m3/hr (out of an average of approx 150 m3/hr). Presents direct measurements of the wind velocity and pressure coefficients induced by the wind on the full-scale test structure.

Presents results of full-scale pressure measurements on 3 test houses. Discusses the influence of different input parameters, such as leakage characteristics and pressure distribution on the rate of air infiltration, employing a simple calculation model.

There are several reports on studies of wind tunnel experiments and calculations on the response of air flow at an opening against the periodic variation of wind velocity and pressure. In these studies, the fluctuating components of natural wind velocity have been treated definitely. In this paper, theoretically derives the probability density function from a probabilistic model of wind velocity around the buildings, the consequent wind pressure, and the resulting ventilation rate and contamination concentration.

Describes a wind tunnel investigation of wind pressure distributions over a 1:100 scale model of a single family house, surrounded by identical building models in various regular arrays. Measures time-mean pressures at 122 locations on walls and roofs in a 90 degree wind angle sector. Calculates air change rates and corresponding heat losses for a full-scale building of the same type for a range of wind speeds and outdoor air temperature. Uses the full number of local pressure coefficients for the building surfaces as input data.

An experiment was indertaken in order to explore sensitivity of measured pressures to the accuracy with which the terrain and boundary layer winds are modelled. A 1:100 scale model was tested for a single roof pitch and wind angle and eight different boundary layer simulations. The experiment was conducted as part of a review of the reliability of wind tunnel test data when compared with full scale experiments, such as those carried out by the Building Research Establishment at Aylesbury.

Conducts a study of wind loading of low buildings, based on models of several different heights, lengths and roof slopes, and includes roofs with and wthout eaves and both open country and urban exposures. This forms the basis of the National Building Code of Canada.

Tests a large office building, consisting of several octagonal towers and other blocks in a boundary layer wind tunnel. Determines the highest suction pressures which are relevant for the fixing of the cladding. Uses a tracer gas method to determine recirculation problems of the ventilation system inlets and outlets resulting from the arrangement of octagonal towers of different heights. Wind velocities on the flat roof of some towers are studied by meansof an erosion technique using flour, checks the accuracy of the method using hot wire measurements.

The estimation of the average wind pressures on buildings can be made via wind tunnel measurements. Carries out measurements on 5 models of buildings under various conditions. With the aid of these results and some interpolation, makes a prediction of the average wind pressure for a large number of buildings. Includes studies of the effects on the pressure caused by another building upwind.