Showing papers in "Journal of Wind Engineering and Industrial Aerodynamics in 1980"

TL;DR: In this article, the authors have described the nature of the horseshoe vortex system and measured the pressure distribution under the vortex system, and the variation of the vortex and boundary layer separation position with the flow parameters.

TL;DR: In this article, surface pressure and response on the CAARC standard tall building model, made at six establishments, have been compared and the degree of agreement was good and mostly within the scatter of reasonable experiemental accuracy.

TL;DR: In this paper, the results of a series of wind tunnel tests in which the surface pressure fields of low-rise buildings have been studied were presented, showing that it is possible to describe the surface pressures on groups of lowrise buildings in terms of three types of flow regimes known to exist for the flow over general arrays of roughness elements on a surface.

TL;DR: In this paper, the aerodynamics of wind turbines are reviewed starting with effects of lift and drag on translating devices and proceeding through the performance aerodynamic of the horizontal-axis and vertical-axis machines currently in service.

TL;DR: In this paper, it was shown that a fluctuating pressure was produced due to the vortex shed from the leading edge in response to the motion, and that this pressure could be a major cause of this type of vortex-induced oscillation.

TL;DR: In this article, a review of the results from these studies are reviewed and compared and it is shown that there is reasonable agreement between the estimates for the power loss due to interactive effects in a cluster generating 1000 MW, if the rotors are spaced 10 diameters apart.

TL;DR: In this article, a study has been completed to evaluate the accuracy of a wind tunnel investigation of flow over a complex terrain model, including terraced and contoured models of the Rakaia River Gorge region of New Zealand.

TL;DR: In this paper, numerical solutions of the equations of motion of a neutrally stratified atmospheric boundary layer passing over a two-dimensional hill or embankment are obtained for a wide range of hill and embankments shapes, and they are found to agree well with the corresponding available experimental data and other theoretical results.

TL;DR: In this article, the authors used a novel technique which takes into account short-term fluctuations in wind direction to predict wind loads on the structures and cladding of glasshouses and provided data on wind loads, measurements were made on five shapes of glasshouse, under natural wind conditions and generally over a 90° range of direction.

TL;DR: The results of the wind energy resource survey of New Zealand serve as the major illustration of a current nation-wide programme as discussed by the authors, which is an essential element in a programme involving the extensive use of wind energy.

TL;DR: In this paper, the authors present recent research on aeroelastic and structural dynamic aspects of large horizontal-axis wind turbines in a unified manner and present results illustrating the characteristics of the isolated blade behavior.

TL;DR: The interference of flow between two circular cylinders in some critical arrangement may lead to two different flow patterns which intermittently change over producing different aerodynamic forces as discussed by the authors, and three such critical arrangements have been found for two cylinders of infinite aspect ratio.

TL;DR: In this article, the authors show how the presence of an impermeable backing to an air-permeable cladding reduces the wind load on the cladding and describe the important mechanisms of wind loading for some such cases, particularly tiles over underlay, and the approximations necessary to formulate the calculation procedures of BS5534.

TL;DR: In this paper, full-scale measurements were made in an aeronautical-type tunnel, using a simple approximation to the natural wind-profile without correct simulation of turbulence properties.

TL;DR: In this article, a method of desingning blade geometry of a horizontal-axis medium-speed windmill using blade element theory and an inversion technique is presented, which is simplified by defining a local speed ratio at annular blade elements.

TL;DR: In this article, the authors analyzed three years of data from an anemometer network installed as part of a national wind-energy resource survey to provide an inventory of the wind energy available annually in the region and a description of the characteristics of prospective aerogeneration sites in terms of wind-speed frequency, gust and lull distributions, windspeed height profile and longitudinal turbulence using data with high time resolution.

TL;DR: In this article, the qualitative results of a flow visualisation study of a shrouded cylinder of the slatted form proposed by Wong are described, and salient features of the flow are noted, and possible reasons for such a system suppressing the vortex-excited vibrations are discussed.

TL;DR: In this article, the effects of tall buildings on the properties of sorrounding winds were investigated in the Shinjuku New Metropolitan Center in Tokyo, where six tall buildings each measuring∼200 m in height were located.

TL;DR: In this paper, work designed to improve our understanding of the wind energy resource within the United States is discussed and the techniques and procedures that have been developed for finding wind machine sites are also examined.

TL;DR: In this article, the development of large, horizontal-axis wind turbines (100 kW-2500 kW) with attention to prototype projects managed by NASA is surveyed with the focus on prototype projects with a rotor diameter of 125 ft.

TL;DR: In this paper, an analysis of the geometry of transition pipe sections with the same area at both ends, but varying cross-sectional shape is presented, where Straight-line generators are used along the transitions in both cases.

TL;DR: In this paper, the cross-wind behavior of a circular cylinder in the wake of another in line with the stream direction was investigated, and four models were used for different tandem combinations with varying damping coefficient and interspacing distance.

TL;DR: In this article, the authors determine whether small-scale wind-tunnel models can be used to study wind flow patterns close to a wall (i.e. at distances of from 0.1-5 m) for several engineering problems such as wind noise, wind loading of elements protruding out of the facade, convective heat transfer, and control of external sun-shading devices.

TL;DR: A survey and review of the current state-of-the-art research and development for Small Wind Energy Conversion Systems (SWECS) is presented in this article, where current technical and economic status of SWECS is given including some advantages and disadvantages of various technical approaches to wind energy conversion.

TL;DR: In this paper, experimental and numerical simulations were performed for a horizontal air-curtain jet roof in order to determine its effective protection against precipitation, and small-scale wind-tunnel experiments, using glass beads as precipitation material, yielded results which led to the conclusiom that Froude scaling of the terminal velocities of the particles is not a sufficient criterion for proper simulation; one must also match model and fullscale precipitation Reynolds numbers.

TL;DR: In this article, the mean velocities and turbulent normal-and shear-stresses in the wake of a rectangular cylinder under stationary and galloping conditions are presented, and the results bring out the effects of galloping on the general structure of the near wake and indicate the spatial extent of its influence.

TL;DR: In this paper, the authors used absolute vibration pick-ups to measure bending and torsional vibrations on a tall building erected in the FEAL system, and the results of measurements of the motion of the building caused by wind made it possible to distinguish bending and tensor vibrations.