Showing papers in "Journal of Wind Engineering and Industrial Aerodynamics in 2015"

TL;DR: In this paper, a combined experimental and numerical investigation is carried out to study the performance of a micro vertical-axis wind turbine (VAWT) with variable pitch, which involves a low aspect ratio (AR) three straight blades with struts.

TL;DR: In this paper, three methods of controlling the wind direction were proposed aiming at improving the performance of Savonius rotor, which achieved a power-coefficient peak of 0.52 with operation range of tip speed ratio λ ≤ 2.2.

TL;DR: In this article, the results obtained from an innovative physical model study which examined wind induced forces and pressures on a 1:25 scale model of a Class 390 Pendolino at a 30° yaw angle were explored.

TL;DR: In this paper, a new turbulent inflow generator technique that can be used as inflow boundary condition for LES of lower atmospheric boundary flow (ABL) is proposed based on synthesizing random divergent-free turbulent velocities.

TL;DR: In this paper, the stably stratified atmospheric boundary layer (SABL) is taken an exceptional position as wake effects and thus loads on subsequent turbines are stronger, and the authors show the impact of the SABL on power production and wake effects (power deficits) in offshore wind farms by means of measurements as well as large-eddy simulations.

TL;DR: In this paper, a multi-population genetic algorithm (MPGA) was used for wind turbine layout optimization in a wind farm which aims at extracting the maximum power in a minimum investment cost.

TL;DR: In this paper, the authors evaluated the accuracy of 3D steady Reynolds-averaged Navier-Stokes (RANS) simulations with a revised k-e model for calculating mean wind-velocity patterns over natural complex terrain and provided mean velocity data that can be used as input for real-time ship manoeuvring simulations to evaluate accessing the LNG terminal with larger LNG carriers.

TL;DR: In this article, the effects of vortex-wake-blade interaction for the aerodynamic performance of an FOWT were investigated, and it was shown that the unsteady aerodynamic loads of the floating offshore wind turbine become sensitively changed due to the variation of frequency and amplitude of the platform motion.

TL;DR: In this paper, a new two-dimensional wake model is developed and validated to predict the velocity and turbulence distribution in the wake of a wind turbine, which employs a cosine shape function to redistribute the spread of the wake deficit in the crosswind direction.

TL;DR: In this article, the Menter-SST turbulence model was used to simulate the turbulence properties of wind turbines in a two-dimensional domain, over a range of tip speed ratios typical of the operation of vertical axis wind turbines.

TL;DR: The proposed wind speed forecasting method has better forecasting performance than the traditional Autoregressive Integrated Moving Average (ARIMA) model, the Persistent Random Walk Model (PRWM) and the Back Propagation (BP) neural networks and the proposed method has satisfactory performance in both of the accuracy and the time performance.

TL;DR: In this article, the authors investigate the influence of different urban building morphologies on the urban microclimate and find that building facade surface temperatures are mainly influenced by the distance between buildings.

TL;DR: In this paper, the performance of the unsteady Reynolds-averaged Navier-Stokes (URANS) turbulence modeling of the flow field around a high-rise building with a 1:1:2 shape was examined.

TL;DR: In this article, the authors evaluate the effect of passing passenger trains and freight trains on the wind conditions induced on a passenger platform inside an underground tunnel by means of Large-Eddy simulations.

TL;DR: In this article, the authors developed a multi-turbine cluster for construction of efficient patterned vertical axis wind turbine farms, where numerical solutions were performed for a single Savonius turbine, clusters of two turbines in parallel and oblique positions and triangular clusters of three turbines facing the wind forward and backward.

TL;DR: In this paper, a scaled moving model technique for analysing the slipstream of a high-speed train (HST) with the view of applying this methodology for checking TSI compliance in the design phase of a HST is assessed.

TL;DR: In this article, a multi-objective aerodynamic shape optimization of civil structures through an approach in which evolutionary algorithms are used in synergy with ordinary Kriging surrogates is investigated.

TL;DR: In this article, an unsteady RANS 3D approach was used to predict the effects of skewed winds on the performance of an H-type vertical-axis wind turbine.

TL;DR: In this article, the use of passive vortex generators (VGs) as a simple and effective way to delay or suppress separation on an airfoil optimized for wind turbine blades is examined experimentally.

TL;DR: In this article, the effect of the inclusion of trees in numerical simulations of wind flow in urban areas is investigated, and three approaches are used to include the dynamic effect of trees: the basic approach, the implicit approach, and the explicit approach (trees are represented by porous media).

TL;DR: In this paper, the simulation of the wind flow around an isolated building is performed using various types of RANS turbulence models in the open source code OpenFOAM, and the results are compared with benchmark experimental data.

TL;DR: In this article, the impact of some morphological parameters on the flow within and above the urban canopy is analyzed experimentally (wind tunnel) and numerically (CFD) using simplified, yet more realistic than a simple array of cuboids, building arrays.

TL;DR: In this article, the effects of ice accretion due to in-cloud icing, on the aerodynamic characteristics of bridge hangers and stay cables were investigated, and the final shape of the ice accreted bridge cables was characterized, and related to the ice shape.

TL;DR: In this article, the authors presented high-resolution 3D steady Reynolds-averaged Navier-Stokes (RANS) simulations of forced convective heat transfer at the windward facade of 22 buildings of different geometry.

TL;DR: In this article, the authors compared the wind field characteristics of four typhoon and three hurricanes in the South China Sea/North Pacific and the Atlantic Ocean, respectively, and compared with the recommendations in ASCE7-10.

TL;DR: In this paper, the structural response of ideal point-like Single-Degree-Of-Freedom (SDF) systems subjected to thunderstorm wind actions perfectly coherent over the exposed structural surface is investigated.

TL;DR: In this paper, the evolution of the wind profiles remains poorly understood using high-resolution full-scale data collected with two mobile Doppler radars, and the unique scanning strategy that enables the collection of the dual-Doppler wind profiles also allows for the analysis of the vertical structure of the outflow.

TL;DR: In this article, the wind-induced vibration of the CAARC standard tall building model was investigated via unsteady Computational Fluid Dynamics (CFD) and a structural modal analysis.

TL;DR: In this article, the authors present the results of CFD simulations and wind tunnel measurements to ascertain and quantify the upstream effect by a following car on the drag of the cyclist in front of it.

TL;DR: In this article, the effect of leading edge protuberances on the blade performance at the stall region of the small-scale horizontal axis wind turbine (HAWT) with variable rotational speed was investigated.