Showing papers in "Journal of Wind Engineering and Industrial Aerodynamics in 2017"

TL;DR: In this paper, the authors compared three widely used turbulence models, URANS, SAS and DES, to predict the slipstream of a full-featured generic train model, and the results were compared with wind-tunnel experimental data to determine the fidelity of the models.

TL;DR: In this article, the effects of ground configurations on the slipstream and near wake of a high-speed train are numerically investigated with improved delayed detached eddy simulation (IDDES).

TL;DR: In this paper, the effect of roof and facade geometry on the mean wind flow and turbulence in street canyons, as well as the ability of numerical simulation techniques in capturing the flow features was investigated.

TL;DR: In this paper, the authors proposed a systematic approach to find the optimum values for the closure coefficients of RANS models in order to significantly improve the accuracy of CFD simulations for urban studies.

TL;DR: In this article, a detailed wake analysis of two different turbine concepts is conducted to gain a fundamental understanding of the main energy recovery processes at play in each case, where an axial-flow turbine and a crossflow turbine are considered.

TL;DR: In this article, a stochastic rain texture model is developed to generate three-dimensional fields of raindrops consistent with the rainfall history at the turbine location by integrating the micro-structural properties of rain.

TL;DR: In this paper, a backpropagation neural network (BPNN) combined with proper orthogonal decomposition (POD-BPNN), is proposed for the prediction of the mean, root-mean-square (RMS) pressure coefficients and the time series of wind-induced pressures on a building surface, respectively.

TL;DR: In this paper, a 1/75 aero-elastic scaled rotor of the DTU 10MW reference wind turbine for wind tunnel tests is presented, where the aerodynamic design was focused on the minimization of the difference, in terms of thrust coefficient, with respect to the full scale reference from the Selig low-Reynolds airfoils database.

TL;DR: In this paper, the authors measured facade pressures and ventilation rates in the Silsoe cube under single-sided and cross-flow ventilation configurations, compared with CFD simulations conducted in OpenFoam and ANSYS Fluent using a typical linear workflow approach.

TL;DR: In this article, the effects of oblique tunnel portals on train and tunnel aerodynamics using a 1:20 scale moving model device were investigated using a pressure sensor and micro-pressure wave measured using pressure sensors.

TL;DR: In this paper, the aerodynamic properties of a stationary two-dimensional cylinder with rectangular 5:1 cross section were investigated in the wind tunnel through pressure and force measurements on a sectional model in smooth and turbulent flows.

TL;DR: In this article, the authors compared the performance of EARSM, SAS and IDDES turbulence models for the aerodynamic problem of a high-speed train subjected to cross-wind in terms of aerodynamic force coefficients and pressure distribution at the train surface.

TL;DR: In this paper, the authors used the commercial CFD software STAR-CCM+ to simulate the wind farm with two tandem wind turbines operating in the neutral atmospheric boundary layer (ABL) condition.

TL;DR: In this paper, the effects of different oncoming wind directions on the wind characteristics over the bridge site were investigated in the simulated atmospheric boundary layer, and it was shown that the perpendicular wind speed profiles along the bridge main beam can be generally divided into two parts.

TL;DR: In this paper, the authors report the first aero-elastic test conducted under a scaled downburst wind field at the WindEEE dome facility at the University of Western Ontario, Canada.

TL;DR: In this article, a widely used morphometric method (Macdonald et al. 1998) to calculate the zeroplane displacement (zd) and aerodynamic roughness length (z0) for momentum is further developed to include vegetation.

TL;DR: In this paper, a straight-bladed vertical axis wind turbine (VAWT) model is presented for the evaluation of the stall phenomenon associated with unsteady flow around the airfoil surface with numerical and experimental investigations.

TL;DR: In this article, the authors present an assessment of the capabilities of various turbulence modelling approaches (ELES, SAS, URANS and RANS) to predict the aerodynamic flow around a double-stacked freight wagon, both in isolation and within a train.

TL;DR: In this paper, the aerodynamic performance of two trains that intersect inside a tunnel under ambient wind conditions is investigated, and the results indicate that if Train A travels downwind, the positive pressure of train surface increases and the negative pressure decreases as the wind velocity increases.

TL;DR: In this paper, a new experimental investigation approach of a moving vehicle device is proposed to investigate the aerodynamic characteristics of moving vehicles on bridges under crosswinds, which consists of a vehicle, bridge segment, and motion system etc.

TL;DR: In this article, a Double-Skin Facade (DSF) system with strategic openings was proposed to harvest wind energy in the built environment, and a series of wind tunnel tests and CFD simulations have been conducted to investigate the characteristics and related mechanisms of flow within the cavity of DSF integrated with a tall building model at different incident wind angles.

TL;DR: In this article, the effect of gable roofs on the flow regimes characterizing urban canyons (skimming flow, wake interference, isolated roughness) and the implications in terms of integral parameters (air exchange rate and friction factor), which are useful in practical applications.

TL;DR: In this paper, computational fluid dynamics simulations of carbon dioxide (CO 2 ) dispersion from a natural gas-fueled thermal power plant in an urban environment are compared with experimental measurements of column-averaged dry-air mole fraction (XCO 2 ), obtaining a good agreement.

TL;DR: In this article, the accuracy and limitations of wind profile modeling using the power-law (PL), especially for low speed conditions in which air and thermal pollution can prevail, were investigated.

TL;DR: In this article, the effects of a double-skin facade system on the wind-induced responses of a tall building were investigated via a program of wind tunnel tests, and it was found that the facade with opening(s) reduces the windinduced response significantly, whereas the facade without any opening increases the response, compared to the bare tall building model.

TL;DR: In this article, a series of wind-tunnel tests were carried out to investigate pedestrian-level winds around 40 super-tall building models with various configurations, including basic models, tapered models, corner modified models, opening models, helical models, tilted models, composite models, triangular models, and polygonal models, corresponding to the cases in Tamura et al.

TL;DR: In this paper, the effect of varied blockage-fire source distances (rectangular cylinder shape) on the smoke layer thickness in a longitudinal ventilated tunnel was studied, and a series of experiments were conducted in a 1/6 model tunnel platform.

TL;DR: In this paper, a CRH2A train operating on the Hefei-Wuhan rail line in China was investigated, where twelve tunnels with lengths ranging from 72 to 10766m were investigated.

TL;DR: In this paper, a new experimental setup for the aerodynamic section model testing of bridge decks is presented, which enables the forces acting on the section model to be measured directly while considering motions that resemble actual bridge motion and still fully utilizing the benefits of the forced vibration testing technique.

TL;DR: In this article, the authors investigated the impact of Vicente to Hong Kong with emphasis on the wind fields over different terrain conditions and the wind effects on a 420m-high super-tall building.