Showing papers in "Journal of Wind Engineering and Industrial Aerodynamics in 2002"

TL;DR: In this paper, an analytical model based on the spatial correlation function of the prediction error is derived to describe the statistical characteristics of arbitrary configurations of wind farms, and it is shown that the magnitude of the error reduction depends only weakly on the number of sites and is mainly determined by the size of the region.

TL;DR: In this article, a wind model is developed for studies of the dynamic interaction between wind farms and the power system to which they are connected, which is based on a power spectral description of the turbulence, including the coherence between wind speeds at different wind turbines in a wind farm, together with the effect of rotational sampling of the wind turbine blades in the rotors of individual wind turbines.

TL;DR: In this article, the feasibility of real-time Kinematic-global positioning system (RTK-GPS) for measuring wind-induced responses of buildings was examined, using an electronic exciter.

TL;DR: In this article, a study aimed at simulating the flow structure in a downburst and obtaining the pressure field on a cube immersed in such a flow is presented, where the data obtained from a stationary wall jet simulation of a thunderstorm downburst is compared with data from uniform and boundary layer flows.

TL;DR: In this paper, a large eddy simulation (LES) is performed for the turbulent flow around a circular cylinder at ReD=3900 with a cell-centered finite volume code that solves the compressible Navier-Stokes equations.

TL;DR: In this article, the authors present wind tunnel test data for the aerodynamic properties of an airfoil used on a wind turbine when subjected to incident flow turbulence levels of 05-16% and placed at angles of attack up to 90°.

TL;DR: In this paper, a half-height cube was immersed in the turbulent boundary layers with several types of vertical velocity profile and the peak pressure distributions on the surface of the half height cube were computed.

TL;DR: In this article, the derivations of expressions for effective static wind load distributions, for all possible combinations of mean, background and resonant response, are given, considering structures for which the response to wind can be considered to be quasi-static.

TL;DR: In this article, it was shown that the roughness length of rough wall surfaces remains constant for falling roughness Reynolds numbers down to at least Re*=1, while viscous effects can change the near-wall Reynolds stresses only for Re* below similar values, so that z0-scaling (rather than scaling based on?/u*) remains appropriate for rough wall regions.

TL;DR: In this paper, an experimental study on the flow characteristics around two square cylinders in a tandem arrangement was performed, where the spacing between the centers of the cylinders ranges from 1.5 to 9 widths of the cylinder and the Reynolds number ranges from 2.0×103 to 1.6×104.

TL;DR: This paper presented a model for describing the damage that might be done to buildings by wind-borne debris in a sustained high-speed wind such as a typhoon or hurricane, as distinct from the damage inflicted by the direct wind pressure itself.

TL;DR: A state-of-the-art summary of research into thunderstorm wind fields from an engineering perspective can be found in this paper, where the characteristics of thunderstorms and the two extreme wind events-tornadoes and downbursts-spawned by thunderstorms are described.

TL;DR: In this article, a two-dimensional street canyon is studied in which the principal parameter is the height of the downstream building and the influence of a third building situated upstream of the street canyon in flow and dispersion inside the street.

TL;DR: In this paper, an experimental investigation was carried out to study the structure of the flow field around three-dimensional obstacles of different aspect ratios, in two different types of boundary layers.

TL;DR: In this paper, an optimization model for the design of a typical blade structure of horizontal-axis wind turbines is presented, where the main spar is represented by thin-walled tubular beam composed of uniform segments each of which has different cross-sectional properties and length.

TL;DR: In this article, the authors evaluate the accuracy of the measurements using GPS and evaluate the ability of GPS to measure small movements of the Stuttgart TV-tower and the industrial chimney of Opole power station due to weak winds.

TL;DR: In this paper, the dual nature of wavelet transforms, being a simultaneous transform in time and frequency, permits adaptation of a number of traditional system identification and analysis schemes in the time-frequency domain.

TL;DR: By investigating acrosswind forces on rectangular cylinders with various side ratios at normal attack angle in a boundary layer wind tunnel, the authors presents empirical formula of acrosswind force spectra, RMS lift coefficients and Strouhal numbers of rectangular tall buildings, and coherence functions of across-wind force are also probed.

TL;DR: In this article, full-scale measurement data observed on the Akashi-Kaikyo Bridge during strong typhoons were analyzed, and power spectral density and spatial correlation of longitudinal velocity fluctuations were analyzed.

TL;DR: In this article, a refined extreme value analysis for three physical phenomena which are leading to high gust wind speeds is presented, i.e., typical storms induced by strong frontal depressions, thunderstorms and additional gust fronts especially in weaker frontal depressions which are induced by down-drafts of cold air and/or by rain and which are not fully covered by the usual flow field models.

TL;DR: In this paper, a rod was set upstream of a circular cylinder to control the flow around the cylinder in air-stream, and two flow patterns with and without vortex shedding from the rod occurred.

TL;DR: In this paper, the authors investigated the gust factors under two different weather systems namely the monsoon and thunderstorm (TS) wind systems in Singapore and found that the TS winds are generally larger than those of monsoon winds.

TL;DR: In this article, an approach of three-dimensional nonlinear aerostatic and aerodynamic analysis is presented, in which the nonlinearities of structural geometric, dynamic characteristics and aeroelastic forces due to the large deformation under the static wind loading are considered.

TL;DR: In this paper, the authors investigated the tapering effect for reducing wind-induced responses of a tapered tall building, high-frequency force-balance test was conducted under the two typical boundary layers representing suburban and urban flow environment.

TL;DR: In this paper, the authors investigated the relationship between snowdrift and wind flow on buildings, and to predict the snowdrifts from wind flow patterns around a model building with a stepped flat roof.

TL;DR: In this article, an actively controlled wind tunnel for simulating the atmospheric boundary layer is described, where air flows are generated by 99 frequency-controlled fans arranged in a 9 wide by 11 high matrix.

TL;DR: In this article, the authors developed a wind warning system to protect high-speed trains against strong cross-winds, based on high-resolution wind data gathered from a meteorological test site which was especially built for this purpose.

TL;DR: A multimode flutter analysis is proposed based on Scanlan's linear self-excited forces that is single-parameter, non-iterative and offers simplicity, automaticity and robustness and a new full-order analysis for the flutter problem is developed.

TL;DR: The Traditional Techniques of Microclimate Improvement-Project was in several cases called upon to find urgently required local solutions to problems caused by wind in Africa, using trees in an agroforestry setting as mentioned in this paper.

TL;DR: In this article, the splitting on physical factors method for incompressible fluid flows (SMIF) with hybrid explicit finite difference scheme (second-order accuracy in space, minimum scheme viscosity and dispersion, capable of work in wide range of Reynolds numbers and monotonous) and O-type grids were used.