Showing papers in "Journal of Wind Engineering and Industrial Aerodynamics in 1978"

TL;DR: In this paper, a wind tunnel test was made on a number of Savonius rotor configurations in wind speeds of 6-9 m/s with variable variables including blade aspect ratio, blade overlap and gap and the effects of adding end extensions, end plates and shielding.

TL;DR: In this paper, it is shown that it is the forces caused by peak gust wind speeds and associated gradients which people feel most and discusses the relation between peak gust and mean wind speeds.

TL;DR: In this paper, a technique is discussed which enables extreme wind speed probabilities in mixed wind climates to be determined, and it is shown that in such wind climates the method is likely to yield more accurate probability estimates than the traditional Gumbel analysis of annual wind speed maxima, particularly for annual probabilities of less than 2%.

TL;DR: In this article, a process for determining the model scale factor in contemporary full-depth or part-depth simulations of the atmospheric boundary layer in a wind tunnel is proposed, where the scale factor depends on the model complexity.

TL;DR: In this article, the boundary layers grown entirely naturally over a long fetch of roughness give the best simulations and that the artificial thickening by barrier and mixing-device, required to produce smaller scale factors, inevitably reduces the quality of the simulation.

TL;DR: In this paper, a pneumatic manifold is proposed as an economical means for evaluating time-varying spatially-averaged pressure loads on tributary areas of design interest on building models.

TL;DR: In this paper, the mean wind and turbulent characteristics of tropical cyclones in the lower 70 meters of the atmosphere were reported and empirical expressions for velocity profile and spectral functions were proposed and compared with existing theoretical expressions.

TL;DR: In this paper, an experimental investigation of the effects of wind tunnel blockage on the flow over two-dimensional surface mounted flat plates is reported, and the blockage ratio was varied for a range of boundary layer thickness to fence height ratio (δh) and wall friction to free stream velocity ratios (UτU1).

TL;DR: In this paper, mean and fluctuating pressures on a two-dimensional square prism in uniform flow at a Reynolds number of 1.4 × 105 were measured to investigate the nature of the separation-reattachment phenomenon.

TL;DR: In this article, the effect of wall constraint on rectangular-section prisms is investigated experimentally in a low-turbulence wind tunnel up to a blockage ratio of 0.25.

TL;DR: In this paper, the spire roughness technique was used to simulate the lower part of the neutral atmospheric surface layer for the study of pressures on 1:70 scale models of low-rise buildings.

TL;DR: In this paper, the drag coefficient of porous circular cylinders (60% open area ratio) fixed between solid hemispherical end caps, for five values of aspect ratio between 7.92 and 2.67, was analyzed.

TL;DR: In this article, the authors compared the results of wind-tunnel tests on a scale model of the Rock of Gibraltar with the results from full-scale data from two sources, structural damage to the East Side Water Catchment and a survey of turbulence on the approach flightpath to the airfield at Gibraltar, and showed that simulation of the flow around large sharp-edged topographical features is practical at scale factors as high as 1 5000 for conditions of strong wind and neutral stability.

TL;DR: In this article, a field experiment concerned with wind forces on a large concrete chimney and the vibrations caused by these forces is presented, and some conclusions regarding chimney vibrations are given.

TL;DR: In this paper, a wind-tunnel investigation has been conducted on a simple cubical model to see the effect of outside wall leakage on internal and external pressures, and the results have been extended to smoke-control problems.

TL;DR: In this paper, the assessment of prospective environmental wind conditions about proposed building developments in Australia has been discussed, with examples from a study of two possible building configurations for a very exposed site on the north side of the City of Melbourne.

TL;DR: A mathematical analysis of a vortex which is generated by a stationary tower with a partially opening top and directed by vertical vanes is presented in this paper, where a concentrated vortex and higher pressure drop can be obtained from this tornado-type wind-energy system.

TL;DR: The C.T.B.S. pressure probe as mentioned in this paper is based on the average of the mean pressures around a vertical cylinder associated with a disk in its wake and gives a very stable mean pressure independent of the wind direction, inclination to the wind (in the range ±20°) and the wind speed levels.

TL;DR: In this paper, the mean and oscillating pressure at three levels of a 240m concrete tapered chimney are described. And the data are digitalized and recorded continuously, allowing to understand the longitudinal evolution of the vortex shedding and its characteristics at fixed level.

TL;DR: In this article, a method for the linear simulation of the multi-component structure of turbulence in the atmospheric surface boundary layer is described, where the spectral matrix is first diagonalized, then spectrally factored to provide kernels of the functional representation.