Journal of Wind Engineering and Industrial Aerodynamics最新文献_第6页

Aerodynamic characteristics of windbreak wall–wind barrier transition section along high-speed railways during strong crosswinds 强侧风作用下高速铁路防风墙-风障过渡段气动特性研究

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-08 DOI: 10.1016/j.jweia.2025.106038

E Deng , Ling-Yi Diao , Huan Yue , Yue Dong

{"title":"Aerodynamic characteristics of windbreak wall–wind barrier transition section along high-speed railways during strong crosswinds","authors":"E Deng , Ling-Yi Diao , Huan Yue , Yue Dong","doi":"10.1016/j.jweia.2025.106038","DOIUrl":"10.1016/j.jweia.2025.106038","url":null,"abstract":"<div><div>In the embankment–bridge transition section of high-speed railroads, solid windbreak walls and porous wind barriers serve as primary engineering measures to mitigate the effects of strong winds. This study investigates the mechanisms by which the aerodynamic performance of the transition section between solid windbreak walls and porous wind barriers deteriorates. Aerodynamic loads on trains, bridges, and wind barriers are analyzed in this study, which also examines the evolution of flow field characteristics and power spectral density (PSD) across spatial and temporal scales, based on wind tunnel tests, flow visualization tests, and computational fluid dynamics methods. The results reveal that the presence of double-sided wind barriers alters the distribution of turbulence intensity and vortex structures near the bridge–wind barriers compared to single-sided wind barriers. Additionally, double-sided wind barriers greatly increase the aerodynamic loads on trains and bridge–wind barriers compared to single-sided wind barriers. Furthermore, the peak PSD values for bridge-wind barriers with double-sided wind barriers are 1.9–4 times higher than those with single-sided wind barriers. Consequently, the single-sided wind barrier may be a more suitable choice for handling unidirectional crosswinds, considering construction costs and structural safety concerns for both the bridge and the wind barrier.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"258 ","pages":"Article 106038"},"PeriodicalIF":4.2,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical study on ventilation duct layout in subway stations for smoke control performance optimization 地铁车站通风管道布置优化排烟性能的数值研究

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-08 DOI: 10.1016/j.jweia.2025.106039

Chen Junfeng , Yang Dong , Zhong Maohua , Hua Fucai

{"title":"Numerical study on ventilation duct layout in subway stations for smoke control performance optimization","authors":"Chen Junfeng , Yang Dong , Zhong Maohua , Hua Fucai","doi":"10.1016/j.jweia.2025.106039","DOIUrl":"10.1016/j.jweia.2025.106039","url":null,"abstract":"<div><div>Smoke is the most important threat to occupant safety in subway station fire accidents. However, only a few smoke control research has concerned the global ventilation system layout problem. With numerical simulation, this work explores the impact of ventilation system parameters on the smoke control efficiency in the hall area of a subway station. The proper ventilation duct layout distance is acquired according to the airflow field structure. The results suggest that: (1) The current ventilation system with two ducts 8m part in the subway station has been proved insufficient for smoke control with about 90% of the heat trapped in the station. (2) The lateral ventilation duct layout, i.e. the ventilation duct amount, is the decisive factor of the ventilation system efficiency. While ventilation volume and vent amount, which is generally considered important factors in traditional studies, show a limited impact on the overall ventilation efficiency. (3) A dimensionless airflow velocity is defined for ventilation duct influence range analysis. The influence range evaluation results are consistent with the tendency of smoke exhaust rate in different ventilation duct distance scenarios. The results could provide theoretical support for the ventilation duct layout design in subway stations.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"258 ","pages":"Article 106039"},"PeriodicalIF":4.2,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An enhanced empirical model for moving downburst wind profiles: Integration with CFD simulations 一种增强的下突风廓线经验模型：与CFD模拟集成

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-07 DOI: 10.1016/j.jweia.2025.106037

Zhiyuan Fang , Zhisong Wang , Hanjie Huang

引用次数: 0

Full-scale monitoring of a telecommunication lattice tower under synoptic and thunderstorm winds 在天气和雷暴风下对电信格塔的全面监测

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-06 DOI: 10.1016/j.jweia.2025.106022

Ileana Calotescu , Daniel Bîtcă , Maria Pia Repetto

{"title":"Full-scale monitoring of a telecommunication lattice tower under synoptic and thunderstorm winds","authors":"Ileana Calotescu , Daniel Bîtcă , Maria Pia Repetto","doi":"10.1016/j.jweia.2025.106022","DOIUrl":"10.1016/j.jweia.2025.106022","url":null,"abstract":"<div><div>This paper presents a full-scale monitoring system installed on a 50 m tall telecommunication lattice tower located in Sânnicolau Mare, Romania. The system has the dual purpose of measuring wind velocity and the wind-induced response of the tower, with particular attention to thunderstorms. It includes an ultrasonic anemometer, a temperature sensor, two triaxial accelerometers, six strain gauges and a video camera system. A first set of data recorded between January 2021 and December 2022 is analyzed in order to compare the dominant properties of thunderstorm and synoptic wind records and reveal the corresponding structural response. An improved approach to wind characterization based on anemometric and video data is proposed to separate the wind records into depressions and thunderstorms, highlighting the innovative use of video sequence to support classification of events. Anemometric and video data related to detected depressions and thunderstorms are presented, together with their full statistical characterizations. Wind induced structural response due to depression and thunderstorm records are described in terms of acceleration and strain. Patterns of depression and thunderstorm-induced response are presented, with the aim of emphasizing their diversity and complementing the identification of thunderstorms. Correlation of simultaneous wind velocity and structural response records is finally analyzed.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"258 ","pages":"Article 106022"},"PeriodicalIF":4.2,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143303646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aerodynamics of a 5:1 rectangular cylinder under transient accelerated and decelerated winds 瞬态加速和减速风作用下5:1矩形圆柱的空气动力学

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-06 DOI: 10.1016/j.jweia.2025.106023

Qiang Zhou , Shuyang Cao , Md Mahbub Alam , Bing Han

{"title":"Aerodynamics of a 5:1 rectangular cylinder under transient accelerated and decelerated winds","authors":"Qiang Zhou , Shuyang Cao , Md Mahbub Alam , Bing Han","doi":"10.1016/j.jweia.2025.106023","DOIUrl":"10.1016/j.jweia.2025.106023","url":null,"abstract":"<div><div>The present study investigates the aerodynamic characteristics of a 5:1 rectangular cylinder subjected to transient accelerated and decelerated winds, utilizing synchronized pressure measurements in an actively controlled wind tunnel. This research addresses the limitations of existing wind-resistant design codes, which primarily consider synoptic winds, by focusing on the effects of non-synoptic winds. The results show that accelerating and decelerating winds significantly impact cylinder surface pressure, shear-layer reattachment position, spanwise cross-correlation of fluctuating pressure, and aerodynamic forces, with accelerating winds having a more pronounced effect than decelerating winds. Furthermore, the shear-layer reattachment position shifts upstream with increased wind acceleration or deceleration, resulting in a shorter separation bubble. Both accelerating and decelerating winds enhance fluctuating pressures, their spanwise correlations, flow two-dimensionality, and aerodynamic forces. Fluctuations in drag and lift coefficients exhibit an almost linear relationship with wind acceleration or deceleration.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"258 ","pages":"Article 106023"},"PeriodicalIF":4.2,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143354053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of the applicability of different turbulence models in simulating vortex-induced vibration of a rectangular cylinder 不同湍流模型在模拟矩形圆柱涡激振动中的适用性研究

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-05 DOI: 10.1016/j.jweia.2025.106031

Pengcheng Zou , Shuyang Cao , Da Cao

{"title":"Study of the applicability of different turbulence models in simulating vortex-induced vibration of a rectangular cylinder","authors":"Pengcheng Zou , Shuyang Cao , Da Cao","doi":"10.1016/j.jweia.2025.106031","DOIUrl":"10.1016/j.jweia.2025.106031","url":null,"abstract":"<div><div>In this research, the practical applicability of LES, SST-DES and SST-URANS turbulence models to vortex-induced vibration (VIV) problems is investigated by employing a rectangular 5:1 cylinder as the study object. The efficacy of each model in predicting the displacement response, characterizing integrated aerodynamic forces, analyzing vortex shifting over the cylinder surface, and examining three-dimensional flow field effects is thoroughly assessed. The distribution characteristics and phase changes of aerodynamic force and flow field modes under vortex shedding frequency are analyzed based on the DMD method. All three turbulence models can accurately reproduce the lock-in phenomenon of VIV. The VIV response calculated by SST-DES is similar to experimental results and computation efficiency is improved by combining the features of LES and RANS. However, it is still challenging for SST-DES to capture the high-order vortex shedding frequency components of the flow fields in a similar manner to LES. In the SST-URANS simulation, greater work done by aerodynamic force leads to a larger steady-state amplitude. SST-URANS has difficulty in capturing small-scale vortex structures in the flow field and the main vortex location is closer to the leading edge than those obtained by LES and SST-DES. Compared with the results of LES, both SST-DES and SST-URANS overestimate the spanwise correlation of aerodynamic force, while SST-URANS weakens the three-dimensional effects of the flow fields, and the simulated vortex structure only exhibits a two-dimensional distribution. The simulation results supply data support and reference for the selection of turbulence models in the VIV simulations of prolate rectangular cylinders or bridges.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"258 ","pages":"Article 106031"},"PeriodicalIF":4.2,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eulerian RANS simulation of pollutant dispersion in atmospheric boundary layer considering anisotropic and near-source diffusivity behavior 考虑各向异性和近源扩散特性的大气边界层污染物扩散的欧拉RANS模拟

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-05 DOI: 10.1016/j.jweia.2025.106036

Chao Lin , Ryozo Ooka , Hongyuan Jia , Alessandro Parente , Hideki Kikumoto

{"title":"Eulerian RANS simulation of pollutant dispersion in atmospheric boundary layer considering anisotropic and near-source diffusivity behavior","authors":"Chao Lin , Ryozo Ooka , Hongyuan Jia , Alessandro Parente , Hideki Kikumoto","doi":"10.1016/j.jweia.2025.106036","DOIUrl":"10.1016/j.jweia.2025.106036","url":null,"abstract":"<div><div>This study proposes an anisotropic concentration diffusivity model in the Reynolds-averaged Navier-Stokes equations (RANS) and the Eulerian dispersion model. The proposed model combines models to consider the turbulent anisotropic and near-source limited diffusivity based on the generalized gradient-diffusion hypothesis and travel time. The proposed model and conventional isotropic models were applied to predict the pollutant dispersion in an atmospheric boundary layer from elevated and ground-level sources. The predicted concentration profile and plume half-width were validated with a previous wind tunnel experiment in the literature. Both the proposed and isotropic models using the diffusivity limiter accurately predicted the mean concentration profiles at the central vertical plane. The isotropic models did not accurately predict the horizontal and vertical plume widths of the ground-level source while the proposed model successfully predicted those. The equivalent turbulent Schmidt numbers in the proposed model differed in each direction. The proposed model predicted counter-gradient turbulent diffusion in the streamwise direction. In addition, accurate Reynolds stress was found to be crucial for reproducing the anisotropic concentration diffusivity in the proposed model.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"258 ","pages":"Article 106036"},"PeriodicalIF":4.2,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of turbulence on vortex-excited coupled vehicle-bridge systems: Wind tunnel investigation 湍流对涡激车桥耦合系统的影响：风洞研究

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-03 DOI: 10.1016/j.jweia.2025.106020

Hao-Yang Li , You-Lin Xu , Ming-Shui Li , Le-Dong Zhu

{"title":"Effects of turbulence on vortex-excited coupled vehicle-bridge systems: Wind tunnel investigation","authors":"Hao-Yang Li , You-Lin Xu , Ming-Shui Li , Le-Dong Zhu","doi":"10.1016/j.jweia.2025.106020","DOIUrl":"10.1016/j.jweia.2025.106020","url":null,"abstract":"<div><div>An accurate assessment of driving comfort and safety of road vehicles on a long-span bridge subjected to vortex-induced vibration (VIV) is crucial for bridge managers to decide whether the bridge should be closed to traffic or not. However, the previous studies often overlook the effects of turbulence on coupled vehicle and bridge systems subjected to VIV although turbulence does exist on site. In this study, vortex-excited coupled truck-bridge deck models were tested in a big wind tunnel under smooth and turbulence flows. Vortex-induced response (VIR) and vortex-induced force (VIF) of the bridge deck and the aerodynamic forces on the truck were measured simultaneously. The effects of the turbulence on VIR and VIF of the bridge deck with the truck(s) placed on different lanes were explored. The effects of turbulence on the mean and peak aerodynamic forces as well as acceleration response of the truck on the vortex-excited bridge deck were also investigated. The results show that VIR and VIF of the bridge deck are significantly influenced by turbulence intensities and truck locations. The mean and peak aerodynamic forces as well as acceleration response of the truck also vary significantly with turbulence intensities and truck locations.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"258 ","pages":"Article 106020"},"PeriodicalIF":4.2,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wind-induced loads on canopies attached to building walls 附在建筑物墙壁上的檐篷上的风致荷载

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-02 DOI: 10.1016/j.jweia.2025.106019

Faruk Ahmed Sakib, Ted Stathopoulos, Anjan K. Bhowmick

{"title":"Wind-induced loads on canopies attached to building walls","authors":"Faruk Ahmed Sakib, Ted Stathopoulos, Anjan K. Bhowmick","doi":"10.1016/j.jweia.2025.106019","DOIUrl":"10.1016/j.jweia.2025.106019","url":null,"abstract":"<div><div>Very limited studies have been carried out on wind loading on attached canopies. Current versions of the Canadian code and the American standard provide a procedure for calculating the wind loading on attached canopies. These provisions include a chart to find out both upward and downward wind pressures on the attached canopy. Most past and recent studies regarding this topic have been confined to low-rise buildings. Also, the effect of canopy width has not been investigated thoroughly. Thus, structural engineers are asking for guidance in the estimation of wind loads that may act on canopies in tall buildings. This paper presents a study on the effect of wind loading on attached canopies in medium-height and tall buildings. In this study, high-rise (37 m) buildings with canopies attached to the wall at different heights were tested. In addition, canopies with different widths were also tested. The test program, which was carried out in the Wind Tunnel Laboratory of Concordia University, Montreal, shows that canopies attached at the top of a tall building may experience 70% more suction than that of a low-rise building. In addition, this paper also presents the effect of building height, canopy height, wind angle of attack and effect of considered effective area on wind loading on canopies, which will help structural engineers better understand the behavior of canopies under wind loads both in low-rise and taller buildings. Design provisions for appropriate wind forces for canopies in taller buildings are also provided to help structural engineers.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"258 ","pages":"Article 106019"},"PeriodicalIF":4.2,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Flow mechanism of a vibrating prism using the combined K-nearest neighbor and dynamic mode decomposition method 结合k -最近邻和动态模态分解方法研究振动棱镜的流动机理

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-02 DOI: 10.1016/j.jweia.2025.106013

Zengshun Chen , Likai Zhang , Yujie Wu , Tengda Guan , Yuhao Ma , Yemeng Xu , Sunwei Li , Ke Li , Qian Wang

{"title":"Flow mechanism of a vibrating prism using the combined K-nearest neighbor and dynamic mode decomposition method","authors":"Zengshun Chen , Likai Zhang , Yujie Wu , Tengda Guan , Yuhao Ma , Yemeng Xu , Sunwei Li , Ke Li , Qian Wang","doi":"10.1016/j.jweia.2025.106013","DOIUrl":"10.1016/j.jweia.2025.106013","url":null,"abstract":"<div><div>This study proposes a novel hybrid method, K-nearest neighbor and dynamic mode decomposition (KNN-DMD), for capturing modes of vibrating prisms in the flow field. To validate the effectiveness of the proposed KNN-DMD, the velocity field under structural vibration amplitudes with 0%, 10% and 18% is obtained using large eddy simulation. KNN-DMD is utilized to identify dominant features of the flow field around the prism, such as low-frequency mode, the primary vortex shedding mode, second harmonic mode, and forced vibration mode. The low-frequency mode is associated with fluctuations in the incoming turbulent flow. The primary vortex shedding manifests as the periodic shedding of vortices in the wake region, revealing the dynamics of the shear layer and the process of shedding in the Kármán vortex street. The second harmonic mode, which is a higher-order form of the Kármán vortex street, supplements smaller-scale vortex structures and enriches the vortex characteristics. The forced vibration mode, reflecting the range and intensity of the vibration effect, forms shear layers that propagate to both sides and exhibit an alternate shedding phenomenon. The KNN-DMD reveals the structural modal forms in fluid dynamics more comprehensively and facilitates future research on the fluid-solid interaction and nonlinear stochastic systems.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"258 ","pages":"Article 106013"},"PeriodicalIF":4.2,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143166804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0