Showing papers in "Journal of Wind Engineering and Industrial Aerodynamics in 1989"

TL;DR: In this article, the authors investigate the occurrence of large negative peak pressures near the leading edge of sharp-edged bluff bodies and show that negative peak pressure is produced when the separated shear layer rolls up to form a large vortex near the surface.

TL;DR: In this article, a pneumatic mediation technique for each exposed surface was used to evaluate the lifting forces transmitted to the structures supporting solar collectors placed in solidary rows on the flat roofs of multilevel buildings.

TL;DR: In this paper, a mathematical model based on the discrete vortex method for predicting the performance of a Savonius wind turbine is presented, which attempts to represent the complex unsteady flow field with separating shear layers in a realistic fashion consistent with the available computational tools.

TL;DR: In this paper, the aerostatic and aerodynamic characteristics of structural members were investigated using two-dimensional wind tunnel tests in these tests problems occur owing to the effects of end plates and blockage, and it is concluded that the required dimensions of the end plates can be determined on the basis of Karmans theory of vortex streets.

TL;DR: In this article, the authors used a forced model oscillation technique to study the dependence of aerodynamic stiffness and aerodynamic damping forces on turbulence, steady wind speed, amplitude and geometric details.

TL;DR: In this paper, a statistical analysis of series of maximum annual wind speeds, classified according to type of storm and wind direction, furnishes evidence concerning the following: a) for each type and orientation, the type I probability distribution showed a better fit to the data than either the type II or Log Normal distributions, b) the parameters of the extreme wind distributions for the two storm types are significantly different from each other.

TL;DR: The Aylesbury Comparative Experiment as mentioned in this paper validated techniques for modeling low-rise buildings at large scale factors in wind tunnels by comparing the results from a 1: 100 scale standard model in wind tunnel around the world.

TL;DR: In this paper, full-scale pressure and drag measurements were made in the natural wind to determine the frequency response function of the windbreak and to describe its micro-environment in terms of mean pressure coefficients and power spectra.

TL;DR: In this article, wind tunnel measurements were carried out to determine drag coefficients of the 16-sided polygon and -for comparison - of 4, 12 sided polygon, and circular cylinders and balance and pressure measurements were made parallel with and Re-number dependence was also investigated within limited range.

TL;DR: In this article, a relationship between speed induction factors, drag/lift ratio and tip-loss factor has been derived corresponding to the maximum power extraction from horizontal axis wind turbines, and the optimum design and peak performance prediction method has been simplified, even when considering the effects of drag and tip losses.

TL;DR: In this article, the heat flux is calculated from the profiles of the wind speed and the air temperature, which are simultaneously observed by kytoons at three points in an urban area with a large pond, to examine the difference between the built-up area and the water surface.

TL;DR: In this article, the requirements in force in Florida at the present time for: The South Florida Building Code, the Sanibel Island Hurricane-Resistant Code, and the 1986 Florida Coastal Zone Protection Act using the revised Standard Building Code hurricane-resistance requirements.

TL;DR: In this paper, a simplified flow model is presented and used for the performance prediction of tip-controlled horizontal axis with turbines, where the wake of the turbine is modeled by a system of trailing vortex lines which emanate from junction points of the bound vortex system of the blade.

TL;DR: In this article, the authors investigated the total volume of the buildings around the weather stations in Japan and asserted that the yearly variation of the ground roughness is greater than they expected, and they showed that the building density has increased radically since 1960 and is closely correlated with the yearly variations of windspeed.

TL;DR: In this paper, a method has been developed to calculate extreme wind loads on overhead conductors taking wind direction and line orientation into consideration, and the method is extended to derive probability distributions for extreme wind load for using in the probability-based design.

TL;DR: In this article, the authors used a specially developed barometric pressure probe, suspended from a cable strung between two chimneys, to estimate the zero-crossing angle of the pressure distribution.

TL;DR: In this paper, video images of the top view of smoke dispersion in the wake of a building were analyzed, where a continuous source of smoke was emitted at floor level, midway along the leeward side of the building.

TL;DR: In this paper, a technique developed using models scaled to fail under wind tunnel wind loading allows some simple structural failure mechanisms of low buildings to be illustrated and also provides simple quantitative comparison of the effect of a multitude of parameters on the overall performance.

TL;DR: In this paper, a comparison of a low-rise and a medium-rise version of a new housing development was made with the help of wind tunnel test at a scale of 1/500.

TL;DR: In this paper, the results of an aeroelastic model test of a cable-stayed bridge were presented, built at a geometric scale of 1:75 and tested in the National Aeronautical Establishment's (NAE) 9 m x 9 m low speed wind tunnel.

TL;DR: In this article, the authors examined field and laboratory experiments to determine their relevance to Hydrogen Fluoride spill scenarios and developed entrainment models to incorporate into integral and depth averaged numerical models.

TL;DR: In this article, the authors report the preliminary stages of a research project which aims primarily at developing practical numerical tools to assess the performance of structures under wind actions, and argue that the finite element method can constitute a competitive and reliable alternative to traditional experimental analyses.

TL;DR: In this article, full scale measurements were done at an reinforced concrete chimney of 230 meters hight, and the instrumentation was described and first results will be presented in detail.

TL;DR: In this article, the effect of simultaneously acting vortex excitation of higher modes as well as flutter mechanisms on the reliability of wind loaded bridge structures is investigated based on reliability analysis of windloaded bridge structures.

TL;DR: In this article, the aerodynamic coefficients for a three-flue chimney in a truss housing, its flues and its supporting truss are investigated. And a proposition concerning a computational approach to the dynamic wind load on this type of structure is also given.

TL;DR: Based on the two layer concept, an analytical method is described in this paper allowing to calculate the changes of the average wind field due to a gentle topography, and a new scaling in the equation of motion is suggested as well as an objective method of determining geometric properties of the topography.

TL;DR: In this paper, the effects of open cuts for road construction on the local wind environment in a complex terrain are discussed using wind-tunnel simulation, the results of which are examined by full-scale measurements.

TL;DR: In this paper, the Strouhal number was shown to change from 0.14 to 0.20 when the angle of approach of the wind altered by approximately 5° at certain angles.