样式: 排序: IF: - GO 导出 标记为已读
-
Statistical assessment of the concentration fluctuations in street canyons via time-resolved wind tunnel experiments J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-27 Bálint Papp, Balázs Istók, Márton Koren, Márton Balczó, Gergely Kristóf
Time-resolved wind tunnel experiments are performed for three periodic street canyon configurations: one of uniform ( = 1) and two of variable building height (consisting of 0.5 and 1.5 tall towers in aligned and staggered arrangements) for perpendicular wind direction. The velocity field is mapped using Laser Doppler Anemometry (LDA), and the tracer gas concentration is sampled using Fast Flame Ionization
-
Large-eddy simulation-based wind and thermal comfort assessment in urban environments J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-26 Geunwoo Oh, Mingyu Yang, Jung-Il Choi
This study analyzed the thermal wind environment at the pedestrian level around urban geometry featuring high-rise buildings using building-resolved large-eddy simulation (LES) while incorporating seasonal atmospheric data. The synthetic inflow generation method and immersed boundary method with wall-function were applied for urban thermal flow LES. The solver was validated using wind tunnel experiments
-
Identification of flutter boundary of a bridge deck section using CFD and flutter margin analysis J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-26 Kunal Tongaria, Abhijit Gogulapati, Naresh K. Chandiramani
Aeroelastic flutter identification of a two-dimensional bridge deck section using time domain techniques is studied. Aeroelastic simulations are performed using the aeroelastic solver available in open source OpenFOAM 5.0, wherein aerodynamic loads are computed using Unsteady Reynolds Average Naiver–Stokes (URANS) solver. The bridge deck section, modelled as a rigid body, exhibits pitch and heave degrees
-
Surrogate model benchmark for kω-SST RANS turbulence closure coefficients J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-24 Philipp Schlichter, Michaela Reck, Jutta Pieringer, Thomas Indinger
AI-based methods show immense potential to assist engineers in further improving vehicle aerodynamics. It is vital to assess the performance of different surrogate models based on the provided training data size and shape to aid future model selections. This study uses data from the simulated flow around the 2D NACA 8810 airfoil. The closure coefficients of the kω-SST RANS turbulence model are varied
-
Interference effects of a neighboring building with various rotation angles on wind pressures of a high-rise building J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-23 Moukun Du, Bowen Yan, Xuhong Zhou, Qingshan Yang, Lingjun Wang, Xiao Li, Yuncheng He, Qisheng Liang
Gaining a comprehensive insight into the characteristics of wind pressures on the building when interfered by neighboring structures is essential for the wind-resistant design. Interference effects of a neighboring building with four height ratios and three rotation angles on the wind pressures of a high-rise building in different configurations were investigated using wind tunnel experiments. The
-
Fragility analysis and wind directionality-based failure probability evaluation of transmission tower under strong winds J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-21 Chao Zhu, Qingshan Yang, Guoqing Huang, Xinxin Zhang, Dahai Wang
Strong wind is one kind of the most destructive natural disasters devastating transmission towers. The damage and even collapse of transmission towers caused by strong winds occur frequently. Wind-induced fragility assessment of the transmission tower is of great significance for the safety and economy of transmission tower. It provides not only a basis for the disaster mitigation and risk assessment
-
Influence of gap thickness on aerodynamic forces and flow structures of circular cylinders under passive-suction-jet control J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-19 Xiang-Wei Min, Wen-Li Chen
A parametric study of the passive-suction-jet control scheme was experimentally performed for the cylinder model. The dependence of the control effectiveness on the gap thickness was determined for a cylinder model controlled by passive-suction-jet pipes at Reynolds number () values ranging from 20,000 to 60,000. The fluid forces and flow structure were measured on a cylinder model without any control
-
A characterisation of vehicle-driver response to lateral disturbances when passing through bridge tower wakes J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-14 Sebastian Reymert, Anders Rønnquist, Ole Øiseth, Lars Drugge
Some of the strongest wind-induced lateral perturbations of the vehicle-driver system on bridges are observed when passing the towers. Occupants may feel uncomfortable or unsafe as a result. The aims of this work are to characterise the wind velocity profile observed in the wakes of bridge towers and understand the mechanisms through which the vehicle-driver system responds. A test vehicle was repeatedly
-
Wind-induced damage estimation of envelope components for low-rise buildings: Incorporation of directionality and multiple openings J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-14 Fengbo Wu, Jiangshan Gong, Jingzhou Xin, Jianting Zhou, Hong Zhang, Ning Zhao
The envelope components (e.g., roof sheathing panels, windows) of low-rise buildings often suffer from serious damage in strong winds. Efficient and accurate estimation of wind-induced damage to these components with various mean recurrence intervals (MRIs) is desired to facilitate damage mitigation strategies. This study develops novel database-assisted first- and multi-order Monte-Carlo simulation
-
Kirigami-inspired wind steering for natural ventilation J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-13 Lucia Stein-Montalvo, Liuyang Ding, Marcus Hultmark, Sigrid Adriaenssens, Elie Bou-Zeid
Ensuring adequate ventilation of exterior and interior urban spaces is essential for the safety and comfort of inhabitants. Here, we examine how angled features can steer wind into areas with stagnant air, promoting natural ventilation. Using Large Eddy Simulations (LES) and wind tunnel experiments with particle image velocimetry (PIV) measurements, we first examine how louvers, located at the top
-
Investigation on aerodynamic characteristics of high-speed trains with shields beneath bogies J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-10 Zhiyuan Dai, Tian Li, Weihua Zhang, Jiye Zhang
The key issue for developing energy-saving high-speed trains is to optimize aerodynamic performance. Therefore, the strategy of installing shields beneath bogies (SBBs) is proposed to improve the aerodynamic performance of the train further. A high-speed train Case0 without SBB and two high-speed trains Case1 and Case2 with different SBBs are established. Numerical simulations are carried out using
-
-
Large eddy simulation of wind loading on an anticlastic conical tensile membrane J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-07 Budhaditya De, Ajay Kumar, Sudib Kumar Mishra
Wind loading on Tensile Membrane Structure(s) (TMSs) is conventionally investigated by the Wind Tunnel Testing (WTT) and is complemented by the Reynold's-Averaged-Navier-Stokes (RANS) based simulation, which lacks fine flow features. To capture finer flow features, this study employs the Large Eddy Simulation (LES) to investigate an anticlastic conical TMS, with and without façade. The sub-grid viscosity
-
Nonlinear aeroelasticity of H-type vertical axis wind turbine blade J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-07 Davood Badiei, Mohammad H. Sadr, Shahrokh Shams
This article presents the nonlinear aeroelastic analysis of the H-type Darrieus wind turbine blade. The blade structural flexibility subjected to unsteady aerodynamic loading in Darrieus motion is the main characteristic of the blade. Large displacements and rotations of the blade at high angle of attacks are considered to study fully nonlinear aeroelastic analysis of the blade under dynamic stall
-
A geographically weighted regression full-track model of tropical cyclones for typhoon hazard assessment in coastal regions of China J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-06 Diqi Zeng, Qiu-Sheng Li, P.W. Chan
A tropical cyclone (TC) full-track model based on geographically weighted regression (GWR) is developed to probabilistically generate TCs from genesis to lysis over the western North Pacific basin for TC hazard assessment. The full-track model includes genesis, movement, and intensity components. Probabilistic models based on auto-regression and copula-based joint distribution functions are established
-
Experimental study on cylinder wake control using forced rotation J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-05 Muharrem Hilmi Aksoy, Sercan Yagmur, Sercan Dogan, Ilker Goktepeli, Murat Ispir
The study focused on the flow over a rotating circular cylinder in the context of flow control. Particle Image Velocimetry was employed to examine flow characteristics at 2.5 × 10 ≤ ≤ 10 × 10. The rotation rates () were considered up to 1.57. The mean drag coefficients () and Strouhal numbers () were examined. The vortex formation length was obtained as approximately 2.1 times the cylinder diameter
-
Identification of aerodynamic admittance functions in active grid generated turbulent flow J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-02 Oddbjørn Kildal, Øyvind Wiig Petersen, Ole Øiseth
The wind loading on bridge decks depends on the turbulent wind field, but importantly also the aerodynamic characteristics of the cross-section. Aerodynamic admittance functions (AAFs) map the transfer of turbulent winds to resultant forces for a specific cross-section shape as a function of one or more frequencies and/or wavenumbers. In this study, a twin deck section model with pressure taps was
-
Sinusoidal oscillating flow over two tandem square cylinders: Three-dimensional large eddy simulations J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-02-02 Peiyuan Wang, Qiang Zhou, Mingshui Li, Shuyang Cao
Three-dimensional large eddy simulations are conducted to investigate the sinusoidal oscillating flow over the two tandem square cylinder at Reynolds number = 1000 and the spacing ratio = 3.5 (: center-to-center distance between the cylinders, : cylinder width). The velocity of sinusoidal oscillating flow is set as = (1+sin2π(/)), where is the velocity amplitude ratio varied from 0.05 to 0.50, and
-
Wind turbine tip deflection control using bio-inspired tubercle leading edges: Analysis of potential designs J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-31 Ahmed S. Shehata, Abdallah Barakat, Mohamed T. Mito, Mostafa Aboelsaoud, Youssef Khairy
A major challenge to wind turbine design is enlarging their blades to harness more power. However, aerodynamic loads can cause blades to deflect, flutter and possibly fail. Humpback Whales do not have this problem, despite their large size, due to the presence of tubercles on their flippers. This study investigates the design of bio-inspired tubercles on the leading edge of wind turbine blades to minimize
-
Quartic Hermite polynomial model-based translation method for extreme wind load estimation J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-30 Yan-Gang Zhao, Tianfeng Wang, Xiaowen Ji, Guoqing Huang
Determining the extreme values of wind loads is crucial for wind-resistant design of structures. The Hermite polynomial model (HPM)- based translation method, which uses the first four moments of wind load, is the most recognized and widely used method for extreme wind load estimations. In this study, a quartic HPM-based translation method for estimating extreme wind loads is proposed. A strategy for
-
Effect of modelled areas and inflow turbulence on the wind characteristics over a densely built-up city J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-31 Yasuaki Ito, Kiyoshi Sasaki
Wind characteristics are significant parameters in evaluating the wind loads on high-rise buildings, and an appropriately modelled boundary layer flow is used in wind tunnel tests with the surrounding building models, approximately 1 km in diameter. However, the fetch necessary to generate an actual flow field around a target building is yet to be determined. Therefore, in the present study, the statistical
-
Effect of railway cutting depths on running safety and pantograph–catenary interaction of trains under crosswind J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-31 Xinran Wang, Tanghong Liu, Yutao Xia, Hongrui Gao, Xiaoshuai Huo, Bin Xu, Zhengwei Chen
Crosswind stability of trains is significantly affected by running safety and pantograph–catenary interaction, which are dependent on the depths of railway cuttings. Under crosswind with wind speed of 30 m/s and yaw angle of 30°, the aerodynamic loads and surrounding flow of the train and pantograph in the cuttings with different depths (0, 3, 6, 9, and 12 m) were investigated using numerical simulations
-
Assessing Holland’s wind pressure profile parameters used for tropical cyclone wind field modelling J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-29 C. Sheng, H.P. Hong
The tropical cyclone (TC) wind field could be evaluated using Holland’s wind pressure profile defined by the radius to maximum wind speed Rmax and Holland B parameter. Empirical models for Rmax and B were developed using TC best track databases for two different basins and the “observed” surface wind field database (i.e., H*Wind dataset). Although the models developed for the North Atlantic basin (NAB)
-
Non-Gaussian peak factor model for windward walls of rigid buildings of different aspect ratios J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-28 Timothy John Acosta, Jin Wang, Gregory A. Kopp
Windward walls, which are critical for setting the base shear loads, have been observed to follow non-Gaussian features due to the upstream horseshoe vortex, which nature is more prominent for low-rise buildings. Regarding the non-Gaussian process, a translation framework from a Gaussian to a non-Gaussian process has been widely used to approximate the non-Gaussian peak pressures. However, there is
-
POD-based analysis of the pressure field of elongated hexagonal cylinders J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-27 Huan Li, Ruixiang Jiang, Qingkuan Liu, Hanfeng Wang, Xuhui He
This paper presents the effects of aspect ratio (B/D, width to height ratio), Reynolds number (Re, based on free incoming flow U∞ and D), and vortex-induced vibration (VIV) on the pressure properties of elongated hexagonal cylinders through proper orthogonal decomposition (POD) analysis. The examined cases cover B/D = 4, 7, and 10, Re = [3.5 × 104, 4.2 × 105], and primary and secondary VIV resonances
-
Driving safety analysis of wind–vehicle–bridge system considering aerodynamic interference J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-18 Jiaming Zhang, Chao Zhu, Cunming Ma
This paper aims to analyse the driving safety of road vehicles travelling over long-span bridges under crosswinds in a more reasonable manner by considering the aerodynamic interference from the bridge (which has been neglected in previous studies). Firstly, based on the overset dynamic mesh technique in CFD simulations, the aerodynamic coefficients of three representative road vehicles were investigated
-
Two-year wind field measurements near the ground at a site of the Tibetan Plateau J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-17 Weizheng Zhou, Wenjuan Lou, Mingfeng Huang, Jiong Liu, Ming Liang
A nearly two-year wind field measurement in the plateau has been conducted in the south of Tibet. High-frequency anemometric data of the distinctive plateau wind field was obtained. Combining the non-stationary model and test, wind samples are classified into three types of 10-min samples based on the level of stationarity. Analysis reveals the strong non-stationarity, turbulence intensity, gust factor
-
Thunderstorm impact on the built environment: A full-scale measurement and post-event damage survey case study J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-16 Ileana Calotescu, Xiao Li, Mekdes T. Mengistu, Maria Pia Repetto
This paper investigates the impact of an intense thunderstorm on the urban area of Sânnicolau Mare, Romania, based on the meteorological data collected by full-scale field measurement and the damage data of low-rise buildings obtained by post-event survey. The meteorological data throughout the entire thunderstorm process were collected from two sources, namely, a wind and structural monitoring system
-
POD-LSTM model for predicting pressure time series on structures J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-16 Xiaoqing Du, Caiyao Hu, Haotian Dong
A novel method for predicting wind pressure time series on structures is proposed by combining long short-term memory network (LSTM) with proper orthogonal decomposition (POD). POD-LSTM predicts the pressure time series on any circumferential locations of a structure using data from limited pressure taps. The wind tunnel test data of pressure on a single square cylinder and the downstream cylinder
-
CFD modeling of Wind-Driven Rain (WDR) on a mid-rise building in an urban area J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-11 Payam Gholamalipour, Hua Ge, Ted Stathopoulos
Wind-Driven Rain (WDR) loading on building facades is a crucial factor for designing sustainable and climate-resilient buildings and preserving historical buildings. WDR loading on buildings has been studied previously but results for such a multi-parameter problem are not generally conclusive. Thus, the relevant provisions of ISO semi-empirical model cannot be applied with confidence for complex building
-
Wind induced peak pressures on low-rise building roofs via dynamic terrain computational methodology J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-09 Theodore Potsis, Ted Stathopoulos
Computational Wind Engineering is expanding rapidly in the last decade and is expected to be introduced as a design tool for wind-induced loads in future code provisions and standards worldwide. The paper discusses the current CWE shortcomings of the state-of-the-art and proposes a methodology that targets to close the current research gaps, from a practical point of view. Monitoring wind tunnel experiments
-
Investigation of aerodynamic effects of rotation on 6-DOF motion of flat square plate based on free flight experiments J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-09 Lizhi Wen, Kazuyoshi Nishijima
Plate-like debris is common windborne debris in windstorms. Although the 3-degree-of-freedom (3-DOF) motion (two translational DOFs and one rotational DOF) of flat plates has been widely investigated in previous studies, the 6-DOF motion is more likely to occur in real storms. We investigate the 6-DOF motion by performing free flight experiments of a square plate with different initial orientations
-
-
Parametric effects of turbulence on the flutter stability of suspension bridges J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-06 Niccolò Barni, Claudio Mannini
Despite extensive past research efforts, the influence of turbulence on suspension bridge flutter stability has not been fully understood yet. Moreover, the role of large-scale turbulence has been overlooked in predicting the critical wind velocity, despite experimental and numerical studies indicating that atmospheric turbulence can have either a stabilising or a destabilising effect. This study investigates
-
Aerodynamic study of a moving Ahmed body by numerical simulation J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-04 Horacio J. Aguerre, Juan M. Gimenez, Francisco Escribano, Norberto M. Nigro
An aerodynamic analysis of the Ahmed body in motion is presented in this work. The goal is to investigate the effect of motion on aerodynamic forces with the aim of generating useful information for reducing drag energy consumption and improving stability and comfort. The research is carried out using finite volume computational simulation with the OpenFOAM(R) libraries. Using the well-known benchmark
-
Reducing ambient sensor noise in wind tunnel tests using spectral subtraction method J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2024-01-04 Tuan-Kiet La, Soon-Duck Kwon
Ambient electrical and mechanical noises can have an impact on sensor measurements during wind tunnel tests, potentially causing inaccuracies, particularly in older sensors. This study introduces a spectral subtraction method to mitigate ambient sensor noise in wind tunnel tests. The proposed method was implemented for three types of measurements in wind tunnel tests: pressure, acceleration, and strain
-
Short-term prediction of tropical cyclone track and intensity via four mainstream deep learning techniques J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-12-29 S.L. Gan, J.Y. Fu, G.F. Zhao, P.W. Chan, Y.C. He
Tropical cyclone (TC) is a highly destructive natural disaster, whose impact is closely correlated to its track and intensity. Thus, it is crucial to obtain the information on TC track and intensity both timely and accurately for early warning and mitigation of related disasters. While there are numerous prediction methods, deep learning (DL) technology has demonstrated exceptional potential in recent
-
Intelligent active flow control of long-span bridge deck using deep reinforcement learning integrated transfer learning J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-12-21 Xiaolong Deng, Gang Hu, Wenli Chen
Aerodynamic forces of the Great Belt Bridge are mitigated using deep reinforcement learning (DRL) based active flow control (AFC) techniques at a Reynolds number of 5×105 in this study. The flow control method involves placing a suction slit at the bottom of the trailing edge of the bridge. The DRL agent as a controller is able to optimize the velocity of the suction to reduce the fluctuating coefficients
-
Nudging based computational wind engineering simulation of the Atmospheric Boundary Layer J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-12-18 Maria Kotsiopoulou, Demetri Bouris
Modeling homogeneous Atmospheric Boundary Layers (ABLs) in Computational Wind Engineering (CWE) requires that all of the conservation equations are in equilibrium. A standard approach is to apply appropriate boundary conditions in order to maintain the inlet prescribed ABL profiles. Recently, the investigation has turned to the implementation of suitable source terms in the momentum equation. In the
-
A frequency-dependent uniform discretization scheme for simulating fluctuating wind field based on a frequency-wavenumber spectrum J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-12-15 Yongxin Wu, Yinying Chen, Weijuan Geng, Xiangtian Xu, Ying Lai
The frequency-wavenumber spectrum-based spectral representation method (FWS-based SRM) serves as an effective and broadly utilized technique for simulating multivariate fluctuating wind fields. Despite its usefulness, it struggles with accuracy in low frequency range during simulations involving structures of considerable length when employing conventional uniform discretization in both frequency and
-
Numerical investigation of wind turbine wake characteristics using a coupled CFD-CSD method considering blade and tower flexibility J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-12-14 Dongqin Zhang, Zhenqing Liu, Weipeng Li, Ling Cheng, Gang Hu
With the increase in wind turbine sizes, careful investigation into wind turbine wake effect is crucial for operational safety. This study proposes a two-way fluid-structure interaction (FSI) model combining large eddy simulation (LES) and computational structural dynamics (CSD) to investigate wind turbine wake characteristics. Examining the effect of blade and tower flexibility and inflow conditions
-
Aeroelastic instability mechanisms of single-axis solar trackers J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-12-08 Zachary J. Taylor, Mark A. Feero, Matthew T.L. Browne
Single-axis solar trackers are currently the most commonly used racking system in utility scale solar photovoltaic (PV) plants. The last decade has seen significant advances in the understanding of single-axis tracker aerodynamics after significant failures have occurred due to aerodynamic instabilities. The current study focuses on the aeroelastic mechanisms causing these divergent instabilities.
-
Prospect of LES for predicting wind loads and responses of tall buildings: A validation study J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-12-07 Abiy F. Melaku, Girma T. Bitsuamlak
Wind load evaluation on buildings using large-eddy simulation (LES) poses several critical challenges. The most notable ones include accurately reproducing the approaching atmospheric boundary layer flow conditions and modeling massively separated flows around buildings. This study investigates the capability of LES for predicting cladding and overall loads on a tall building by addressing these key
-
Fluid-structure interaction behaviors of tension membrane roofs by fully-coupled numerical simulation J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-12-02 Qingshan Yang, Feixin Chen, Yukio Tamura, Tian Li, Bowen Yan
This study aims to investigate fluid-structure interaction (FSI) behaviors of an enclosed-type tension membrane flat roof. The roof with rectangular shape is chosen as the object because of its relatively idealized geometry for FSI analysis, which is a simplified shape compared to typical membrane roofs. Fully-coupled numerical simulations are performed to obtain the wind induced vibration, aerodynamic
-
Spanwise layout optimization of aerodynamic countermeasures for multi-mode vortex-induced vibration control on long-span bridges J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-12-04 Hao Sun, Le-Dong Zhu, Zhong-Xu Tan, Qing Zhu, Xiao-Liang Meng
Aerodynamic countermeasures are widely used to control vortex-induced vibration (VIV) on long-span bridges. However, due to the lack of appropriate three-dimensional (3-D) VIV analysis approach, these countermeasures are usually installed along the entire span of the bridge deck, leading to excessive costs. This study proposes an optimization method for the spanwise layout of aerodynamic countermeasures
-
Discrete viscous dampers for multi-mode vortex-induced vibration control of long-span suspension bridges J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-25 Yiwen Cao, Zhiwen Huang, Hongyi Zhang, Xugang Hua, Zhengqing Chen, Tianbao Wan
Multi-mode vertical vortex-induced vibrations have been observed on several long-span suspension bridges, where several vertical modes of stiffening girder are excited in turn with increasing of wind velocity. This paper proposed a discrete viscous dampers solution and its optimization targeting multi-mode vortex-induced vibration control for long-span suspension bridges. The minimal modal damping
-
Wavelet characterizing the non-stationary features of mountain valley winds both in frequency and time domain J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-26 Zengwei Guo, Zhiqiang Hu, Tao Ma, Xiaoming Huang
This study aimed to quantify and evaluate the non-stationary characteristics of wind speed in mountain canyon terrain. A non-stationarity index was proposed based on continuous wavelet transform to quantitatively evaluate the non-stationarity of measured wind speed samples in both time and frequency domains. Subsequently, the effect of sample length and observation time interval of wind speed samples
-
Estimation of the aerodynamic tortuosity of woven/wire screens J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-25 F.-J. Granados-Ortiz, J. Ortega-Casanova, A. Lopez-Martinez, U.S. Mahabaleshwar
The use of wire/woven screens (WSs) is frequent in applications such as particle or insect-proof screen in home/greenhouse/farm with natural ventilation. Although this passive element has been studied for decades, most previous works have focused on relating the airflow performance only to porosity. However, most recent investigations have demonstrated that other pore-related parameters such as constriction
-
Progressive failure of asphalt shingles under high winds: Assessment via full-field deformation measurements on full-scale roof panels J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-22 Rahim Ghorbani, Fabio Matta, Michael A. Sutton, Zhuzhao Liu, Tim Reinhold, Anne Cope, Sreehari Rajan
Failures of roof asphalt shingles under high winds have been reported to occur at wind speeds lower than the shingle performance classification. The understanding of the progressive failure mechanisms of shingles subjected to high-wind pressures has been hindered by difficulty in accurately quantifying uplifts and wind-induced pressures with high spatial resolution, especially for large-scale wind
-
Surrogate-based optimization for the worst-case prediction regarding a flexible structure impacted by wind gusts J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-21 G. De Nayer, M. Breuer
The paper is a follow-up of the recent study on the assessment of discrete wind gust parameters impacting a flexible lightweight structure as a first step towards the evaluation of the worst-case scenario caused by strong wind gusts (JWEIA 231, 105207, 2022). The present study goes beyond by suggesting an optimization framework which allows to determine the worst-case scenario automatically. For this
-
An atmospheric vortex and its induced loading on a bluff body J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-17 F.T. Lombardo, A. Zaldivar de Alba, G. Chen, D.M. Rhee, J.B. Nevill, Z.B. Wienhoff
Atmospheric vortices such as tornadoes are responsible for some of the most extreme winds on Earth and generate tremendous amounts of damage. Characteristics of atmospheric vortices and induced loading in bluff bodies remain largely unknown, presenting a challenge for safe infrastructure design. Experimental and computational studies have investigated loading from tornado-like vortices and design standards
-
Tropical cyclone genesis prediction based on support vector machine considering effects of multiple meteorological parameters J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-21 Miaomiao Wei, Genshen Fang, Yaojun Ge
Most coastal regions worldwide face great challenges from tropical cyclones (TCs). Accurate prediction of TC genesis is critical for conducting risk assessments and disaster mitigation. Compared to conventional statistical models, this study introduces a machine-learning-based approach utilizing a support vector machine (SVM) to predict TC genesis. Historical TC genesis data from the Japan Meteorological
-
Preface to the Virtual Special Issue of the Eighth European-African Conference on Wind Engineering (8EACWE) J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-12 Alexandru Aldea, Mihail Iancovici
Abstract not available
-
Vehicle-induced aerodynamic lateral loads on cyclists in overtaking maneuvers - Field measurements and universal model description J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-11 Christof Gromke, Bodo Ruck
Vehicle-induced lateral aerodynamic loads on cyclists during overtaking were measured in a field campaign. The study comprised five common vehicle types in combination with four common cyclist types at overtaking maneuvers with vehicle velocities from 30 to 100 km/h and overtaking distances from 0.5 to 2.0 m. The obtained load time histories show distinct phases with the lateral load acting to push
-
Stability analysis of two-dimensional flat solar trackers using aerodynamic derivatives at different heights above ground J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-09 Juan A. Cárdenas-Rondón, Mikel Ogueta-Gutiérrez, Sebastián Franchini, Raul Manzanares-Bercial
In this paper the aerodynamic stability of a flat-plate solar tracker under two-dimensional conditions is studied for different conditions of incident wind speed, U∞, nominal angle of attack, αn∈−40∘,40∘, and shaft height - chord ratio H/B=0.3,0.4,0.5,0.6,1and2. The stability is studied through the analysis of the aerodynamic derivatives A2∗ and A3∗ whose behaviours as a function of U∞ are presented
-
Experimental translating downbursts immersed in the atmospheric boundary layer J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-08 Federico Canepa, Djordje Romanic, Horia Hangan, Massimiliano Burlando
Thunderstorm winds are cold descending gravity currents whose impingement on the ground creates strong radial outflows with maximum wind speeds in the near-ground region. They represent one of the greatest hazards for natural and built environment as well as one of the deadliest phenomena all over the world. This study carries on the post-processing analyses of the downburst experimental campaign performed
-
How do dunes along a desert urban motorway affect the driving safety of sedans? Evidences from long- and short-term monitoring and IDDES J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-11-03 E Deng, Xin-Yuan Liu, Huan Yue, Wei-Chao Yang, De-Hui Ouyang, Yi-Qing Ni
-
Numerical investigation on vertical vortex-induced vibrations of triple-box girders with curved and linear-type webs J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-10-31 Jiabin Zhang, Wenxi Wang, Chaoqun Wang, Xugang Hua, Zhiwen Huang
This article presents a numerical study of the vertical vortex-induced vibration (VIV) of bare triple-box girders with both curved and linear-type webs. The simulation was carried out at Scruton number of Sc = 4πmζ/ρBD = 3.34 with the Reynold number from 1.35 × 105 to 8.09 × 105. The CFD simulation model is verified with data from wind tunnel tests. VIV occurs for both sections at low reduced wind
-
Field measurement study of intense thunderstorm outflows characteristics based on 356 m high meteorological tower J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-10-28 Muguang Liu, Yuanpeng Pan, Jiakai Hu, Chunsheng Zhang, Xianfeng Yu, Zhuangning Xie
Based on the wind speed records obtained by 356-m-high Shenzhen meteorological gradient tower (SZMGT) during 2019–2020, 10 sets of typical intense thunderstorm outflow records were obtained by screening. This paper suggests that moving average period T=60s is a suitable choice based on the correlation between time-varying mean wind and fluctuating wind. In order to discuss the wind characteristics
-
Effects of different aerodynamic configurations on crosswind stability of a conventional train J. Wind Energy Ind. Aerod. (IF 4.8) Pub Date : 2023-10-30 Carlos Esteban Araya Reyes, Daniele Rocchi, Gisella Tomasini, Mikel Iraeta Sánchez, Maialen Artano
Crosswind stability studies have been multiplied since the 90s due to the increase in speed and the continuous weight reduction of the railway vehicles. At beginning, most of the attention was devoted to high-speed trains but recent studies have shown also conventional trains that runs at considerably lower speeds may also have a high risk of overturning due to crosswind. In this study, a conventional