Showing papers in "Journal of Wind Engineering and Industrial Aerodynamics in 1977"

TL;DR: A brief review of windbreak aerodynamics is presented and tests of model shelter fences in a simulated atmospheric boundary layer are described in this article, where measurements of mean wind velocity, RMS velocity fluctuations and energy spectra for the streamwise velocity component were made in the lee of model fences of permeability 0, 20, 34% and 50%.

TL;DR: In this paper, the authors investigated the effect of different flow patterns on the front and base pressures of two cylinders arranged side-by-side to the approaching flow and found that the biased flow was bistable causing a change over at irregular intervals.

TL;DR: In this paper, an alternative approach from the traditional Gumbel method to the estimation of extreme mean wind speeds was examined, based on Rice's upcrossing rate expression and only requires a statistical description of the parent population.

TL;DR: In this paper, the mean force and moment coefficients for a series of flat-roofed rectangular buildings are presented for a range of wind directions, where the coefficients were determined by integrating mean pressures measured on model structures immersed in thick turbulent boundary layers simulating four typical neutral atmospheric flow conditions.

TL;DR: In this article, a quantitative model for air infiltration has been developed that is based upon a linear relationship between air flow and pressure difference across walls and roof surfaces, and a variety of windhouse orientations are tested, and the sheltering effects provided by solid fences, adjacent houses, and tall evergreen trees are assessed and compared.

TL;DR: In this paper, a single square prism was tested at several angles of attack in a wind tunnel in smooth and in turbulent flow, and the mean forces and moments were determined using conventional piezometer openings in conjunction with a liquid manometer.

TL;DR: In this article, the relationship between probability of occurrence and wind speed at a given site, on the basis of maximum annual wind speed series, was determined, and the arguments in favour of each of the extreme-value distributions in use, as well as methods of parameter and confidence limit estimation were discussed.

TL;DR: A wind tunnel of closed return configuration designed specifically for industrial aerodynamic testing is described and its performance is discussed in this article, where a working section 3 m wide × 15 m high × 81 m long with a maximum empty tunnel wind speed of 26 m s−1 provided by its 57 kW variable speed electric motor.

TL;DR: In this article, an approach for the fatigue analysis of cylindrical shell structures subjected to the natural wind assuming the process to be a stationary random process is outlined for the construction of a chimney and two cantilever thin walled shells typical of chimney construction have been tested in a wind tunnel and comparisons made between measured strain spectra and computed values.

TL;DR: In this article, the authors report on the fluctuation components of wind pressure on models of tall buildings and include values of output spectral densities of pressures at some points, and coherence functions plotted against angle of incidence.

TL;DR: In this article, the appearance of bubbles used for flow visualization around bluff bodies in a wind tunnel is illustrated, and it is demonstrated that the large diameter and low density properties of bubbles could enable them to be used to represent raindrops in wind tunnel.

TL;DR: In this article, the use of two-dimensional blufb body models for the study of incident wind effects on buildings is shown to have disadvantages, which arise from axial non-uniformities in the incident flow, whose effects are to produce variations in the surface pressure field along the length of the model.

TL;DR: The TSI three-dimensional split-film anemometer system was used as sensor and a special designed data-acquisition and data-handling system is used for the sampling, digitizing and storing of the data on digital magnetic tapes.

TL;DR: In this article, a limited program of measurements of wind pressure on a film-clad inflated roof greenhouse is presented, where the shape of the roof was modified by the wind and has been calculated for the measured wind load pattern assuming inviscid uniform flow.

TL;DR: In this paper, the authors studied the stability of suspension bridges in random winds and established the criteria for almost sure stability of the equilibrium state of a suspension bridge in stationary random wind.

TL;DR: In this paper, a model structure resembling a flat plate (or a tall prestige building) was tested in a low-turbulence wind tunnel and with flow normal to the facade the model oscillated vigorously in the flow direction when passing through a critical velocity range.

TL;DR: In this article, the authors present the background for the study of channel-shaped bridge decks, and a description of the testing of two detailed sectional models in a (low-turbulence) wind tunnel.

TL;DR: In this paper, a row of air jets directed perpendicularly to the longitudinal wind-tunnel stream is used to simulate the wind characteristics in a rather wide range by just opening or closing a valve; the artificially thickened boundary layer is obtained without solid obstacles and their blockage effects.