Journal of Wind Engineering and Industrial Aerodynamics最新文献

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Experimental study on flow-induced vibration of flexible twin cylinders and its suppression using passive-suction-jet control 柔性双气缸流激振动及被动吸喷控制抑制实验研究
IF 4.2 2区 工程技术
Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-26 DOI: 10.1016/j.jweia.2025.106186
Yan-Jiao Guo , Ye-Wei Huang , Xiang-Wei Min , Wen-Li Chen
{"title":"Experimental study on flow-induced vibration of flexible twin cylinders and its suppression using passive-suction-jet control","authors":"Yan-Jiao Guo ,&nbsp;Ye-Wei Huang ,&nbsp;Xiang-Wei Min ,&nbsp;Wen-Li Chen","doi":"10.1016/j.jweia.2025.106186","DOIUrl":"10.1016/j.jweia.2025.106186","url":null,"abstract":"<div><div>This study experimentally investigates interference-induced vibrations between flexible twin cylinders in nine staggered arrangements with <em>L</em>/<em>D</em> = 3, 4, 5 and <em>T</em>/<em>D</em> = 0, 1, 2 combinations. Dominant vibration modes, phase differences, and frequency characteristics were analyzed, along with the validation of a passive-suction-jet control method. At high wind speeds, besides higher-order vortex-induced vibration (VIV), three types of large-amplitude vibration were identified: wake-induced vibration (WIV), wake-induced flutter (WIF), and LSTR (laminar separation and turbulent reattachment) flow pattern-induced horizontal vibration (LHV)—the latter being observed for the first time in flexible experiments. During LHV, the downstream cylinder exhibited first-mode dominated horizontal motion while its vertical motion was characterized by higher-order modes, with poor coherence between the cylinders. The frequency-locking phenomenon was observed in both WIF and WIV, and proved essential for WIF occurrence. At close spacing, the cylinders primarily displayed vertical approximately anti-phase VIV, which was caused by shear layer interactions. The optimal control scheme, which employs pipe installations of 3/4 span length, effectively suppresses all three large-amplitude vibration types and mitigates various orders of VIV (except for anti-phase VIV in tandem arrangements).</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106186"},"PeriodicalIF":4.2,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704457","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
Investigation on effectively suppressing sunroof wind buffeting noise through utilizing vortex-based energy characteristics 利用涡能量特性有效抑制天窗风抖振噪声的研究
IF 4.2 2区 工程技术
Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-25 DOI: 10.1016/j.jweia.2025.106189
Sishi Cao , Zhifei Zhang , Huili Yu , Zhiming Zhao , Yansong He
{"title":"Investigation on effectively suppressing sunroof wind buffeting noise through utilizing vortex-based energy characteristics","authors":"Sishi Cao ,&nbsp;Zhifei Zhang ,&nbsp;Huili Yu ,&nbsp;Zhiming Zhao ,&nbsp;Yansong He","doi":"10.1016/j.jweia.2025.106189","DOIUrl":"10.1016/j.jweia.2025.106189","url":null,"abstract":"<div><div>Through dynamic mode decomposition (DMD), it is discovered that the significant pressure fluctuations between the center and trailing edge of the sunroof are caused by the vortices expanding and pushing against each other. To effectively improve the squeezing state of vortices within the sunroof, an effective method for suppressing wind buffeting noise has been proposed via precisely arranging the crossbar positions. Specifically, a cylindrical transverse rod is placed at the position where the velocity diffusion term of the first-order mode is minimized, and it is also aligned with the movement trajectory of the vortex. The results of numerical simulations demonstrate that this method achieves noise reduction of more than 14.2 dB. To further explore the modal characteristics of this scheme, the main pressure and velocity fluctuations associated with wind buffeting noise are extracted via DMD, and the modal characteristics of the original scheme and this scheme are compared and analyzed. The results show that the proposed crossbar scheme based on DMD is highly effective in mitigating pressure and velocity fluctuations. The transverse rod is able to effectively disrupt vortices and pressure clusters within the sunroof, leading to a suppression of the prominent resonance peak. By improving the squeezing state between vortices, velocity and pressure fluctuations are subsequently reduced. Compared to the original scheme, the crossbar scheme exhibits more vortices in each dynamic mode, the vortices and pressure clusters of each order dynamic mode have inconsistent streamwise evolutions, thereby suppressing the formation of large single-core vortex and pressure cluster. This is advantageous for suppressing wind buffeting noise.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106189"},"PeriodicalIF":4.2,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703847","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
Transformer-based full-track simulation of tropical cyclones 基于变压器的热带气旋全轨迹模拟
IF 4.2 2区 工程技术
Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-25 DOI: 10.1016/j.jweia.2025.106176
Biao Tong , Gang Hu , Zhongdong Duan
{"title":"Transformer-based full-track simulation of tropical cyclones","authors":"Biao Tong ,&nbsp;Gang Hu ,&nbsp;Zhongdong Duan","doi":"10.1016/j.jweia.2025.106176","DOIUrl":"10.1016/j.jweia.2025.106176","url":null,"abstract":"<div><div>Full-track simulation of tropical cyclones (TCs) is the most widely adopted approach to estimate wind speeds for structure design and TC hazard assessment. This study presents two Transformer-based models, TCformer and eTCformer, for TC full-track simulation. TCformer is designed to directly simulate the entire TC track, aligning with the statistical approach, while eTCformer incorporates large-scale environmental factors such as wind velocity components and vertical wind shear into the Transformer framework, corresponding to the statistical-dynamical approach. The primary advantages of the two DL models lie in their efficiency and flexibility, particularly their ability to capture complex nonlinear interactions among arbitrary variables. Comparative analysis demonstrates that Transformer-based models outperform traditional methods across multiple metrics, exhibiting enhanced robustness and better preservation of spatial correlation patterns, especially in intensity simulations. Furthermore, the accuracy of virtual TC landfall simulations and their evaluated impacts on key coastal cities also underscores the Transformer-based models potential to advance typhoon risk analysis. Overall, the proposed models demonstrate potential as robust tools for reliable TC sample modeling, as well as enhanced understanding of behavioral patterns and improved assessment of both climate change impacts and disaster risks.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106176"},"PeriodicalIF":4.2,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144703952","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
Performance assessment of deep learning models for reconstructing missing pressure data on the high-speed train from wind tunnel tests 风洞试验中高速列车缺失压力数据重建的深度学习模型性能评估
IF 4.2 2区 工程技术
Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-25 DOI: 10.1016/j.jweia.2025.106185
Zheng-Wei Chen, Zhan-hao Guo, Jia-Hao Lu, Cheng Peng, Guang-Zhi Zeng, Zi-Jian Guo
{"title":"Performance assessment of deep learning models for reconstructing missing pressure data on the high-speed train from wind tunnel tests","authors":"Zheng-Wei Chen,&nbsp;Zhan-hao Guo,&nbsp;Jia-Hao Lu,&nbsp;Cheng Peng,&nbsp;Guang-Zhi Zeng,&nbsp;Zi-Jian Guo","doi":"10.1016/j.jweia.2025.106185","DOIUrl":"10.1016/j.jweia.2025.106185","url":null,"abstract":"<div><div>Missing pressure data frequently occurs in surface pressure distribution tests. Traditional methods, including mean, median, or regression imputation, rely on statistical measures or relationships to fill missing values. Comparatively, deep learning offers innovative approaches through autoencoders or generative adversarial networks, which can learn dataset patterns and generate plausible data, thereby enhancing completeness. Relying on pressure measurements from wind tunnel experiments, with inflow speeds varying between 2 and 18 m/s, this paper analyzes the train surface pressure distribution and explores deep learning-based reconstruction for missing data. Results show that as wind speeds increase, absolute pressure values rise proportionally, while distribution patterns remain consistent with prior findings. Moreover, deep learning models exhibit notable reconstruction performance, albeit with differing accuracies. Specifically, the Kolmogorov-Arnold Network achieves the highest precision, recording a 3.26 % average error, followed by the Multilayer Perceptron (7.08 %) and the Long Short-Term Memory network (8.90 %). Such discrepancies underscore the unique capabilities and limitations of each model. These findings demonstrate the efficacy of deep learning techniques in recovering missing pressure data and highlight their potential to augment wind tunnel datasets, ultimately offering a valuable reference for future investigations seeking to address data gaps in aerodynamic research and strengthen data-driven analyses and engineering practice.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106185"},"PeriodicalIF":4.2,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144704458","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
Effects of façade and rooftop greening on the surface pressure distribution of an isolated cubic building with side wall apertures 立面和屋顶绿化对带侧壁开孔的孤立立方体建筑表面压力分布的影响
IF 4.2 2区 工程技术
Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-23 DOI: 10.1016/j.jweia.2025.106174
Vasiliki Pappa , Asterios Bakolas , Demetri Bouris , Christof Gromke
{"title":"Effects of façade and rooftop greening on the surface pressure distribution of an isolated cubic building with side wall apertures","authors":"Vasiliki Pappa ,&nbsp;Asterios Bakolas ,&nbsp;Demetri Bouris ,&nbsp;Christof Gromke","doi":"10.1016/j.jweia.2025.106174","DOIUrl":"10.1016/j.jweia.2025.106174","url":null,"abstract":"<div><div>Greening is considered a sustainable and environmentally friendly policy for urban development but despite the progress made so far, the aerodynamic implications of building embedded greening have yet to be determined. Greening may have a variety of implications on wind loads, natural ventilation and air exchange, all related to the pressure distribution on buildings’ external surfaces. In the present study, a wind tunnel investigation deals with the qualitative and quantitative effects of building greening on the external surface pressure distribution of a model building. Greening was considered to fully cover the external windward façade and the roof under various permeabilities and thicknesses. Openings on the side walls allow for indoor–outdoor air exchange. The position and the thickness of greening were found to be decisive parameters for the overall pressure distribution but attention was also directed towards the fluctuating pressures near the openings, which are expected to be the driving mechanism for air exchange in this configuration. Effects of rooftop greening were confined mainly to the roof and the wake but for windward façade greening, mean and fluctuating pressure differences of up to 35%, compared to the bare building, were observed in the vicinity of the openings. The major effect was a damping of the lower frequencies of pressure fluctuations and it had a stronger dependence on the thickness rather than the material properties of the windward façade greening.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106174"},"PeriodicalIF":4.2,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144686009","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
A novel wind tunnel testing method for debris flight in turbulent winds 湍流中碎片飞行的一种新的风洞试验方法
IF 4.2 2区 工程技术
Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-22 DOI: 10.1016/j.jweia.2025.106183
Shaopeng Li , Kimia Yousefi Anarak , Ryan A. Catarelli , Yanlin Guo , Kurtis R. Gurley , John W. van de Lindt
{"title":"A novel wind tunnel testing method for debris flight in turbulent winds","authors":"Shaopeng Li ,&nbsp;Kimia Yousefi Anarak ,&nbsp;Ryan A. Catarelli ,&nbsp;Yanlin Guo ,&nbsp;Kurtis R. Gurley ,&nbsp;John W. van de Lindt","doi":"10.1016/j.jweia.2025.106183","DOIUrl":"10.1016/j.jweia.2025.106183","url":null,"abstract":"<div><div>Understanding the flight characteristics of windborne debris is crucial for risk mitigation. To physically capture the flight trajectories of small-size windborne debris (using, for example, high-speed cameras), boundary-layer wind tunnel tests need to be conducted at a relatively large geometric scale. However, under a large geometric scale the deficiencies in low-frequency turbulence are significant for conventional wind tunnels with passive turbulence generation. The low-frequency turbulence deficit can lead to a remarkable underestimation in the variation of debris flight trajectories, which compromises the scalability of wind tunnel tests. Although active devices can be used to physically introduce low-frequency turbulence, they are typically not accessible for many researchers and facilities. To this end, one alternative approach based on the “quasi-steady assumption” is introduced in this study to investigate debris flight in turbulent winds without active turbulence generation. In this “quasi-steady approach”, low-frequency turbulence is first considered by physically conducting conventional wind tunnel tests under multiple mean wind speeds and passively generated high-frequency turbulence. The results are then numerically post-processed according to the statistics of the full turbulence spectrum to correct the low-frequency deficit impact on debris flight. In this study, the proposed “quasi-steady approach” and baseline “unsteady approach” (with actively generated full-spectrum turbulence) are compared both numerically and experimentally. The results suggest good agreement of the two approaches, and potential factors accounting for the discrepancies are discussed to guide future investigations.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106183"},"PeriodicalIF":4.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680217","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 analysis of a multispan arch-supported tensile membrane structure 多跨拱支张膜结构的风分析
IF 4.2 2区 工程技术
Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-22 DOI: 10.1016/j.jweia.2025.106181
Krisztián Hincz , Sherly Joanna Pool-Blanco , Márton Balczó
{"title":"Wind analysis of a multispan arch-supported tensile membrane structure","authors":"Krisztián Hincz ,&nbsp;Sherly Joanna Pool-Blanco ,&nbsp;Márton Balczó","doi":"10.1016/j.jweia.2025.106181","DOIUrl":"10.1016/j.jweia.2025.106181","url":null,"abstract":"<div><div>The design of tensile membrane structures requires the determination of the wind induced pressure distribution on their unique anticlastic surface. Design codes, however, only provide pressure coefficients for more conventional wall and roof shapes. The current paper presents the wind tunnel test and load analysis of a common arch-supported tensile roof shape by wind tunnel tests on a rigid small-scale model. At wind directions parallel or almost parallel to the arches, trip wires were applied to model high (supercritical) Re-number flow. Besides the detailed experimental methodology and conditions description, the evaluated results are introduced, including pressure coefficient distributions and the membrane forces for various wind directions. Based on the experimental pressure coefficients, simplified pressure coefficient maps were also determined for each roof zone for six wind directions for design purposes.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106181"},"PeriodicalIF":4.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680215","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
Strong suction events during reformation of leading-edge vortices on building side walls 建筑物侧壁前缘涡改造过程中的强吸力事件
IF 4.2 2区 工程技术
Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-22 DOI: 10.1016/j.jweia.2025.106180
Peter Richards , Roger Hoxey
{"title":"Strong suction events during reformation of leading-edge vortices on building side walls","authors":"Peter Richards ,&nbsp;Roger Hoxey","doi":"10.1016/j.jweia.2025.106180","DOIUrl":"10.1016/j.jweia.2025.106180","url":null,"abstract":"<div><div>Pressure measurements on the side walls of the Silsoe 6 m Cube exhibited minimum pressure coefficients which were significantly lower than expected from quasi-steady theory. Both velocity and pressure data are used to illustrated that this can be associated with the reformation of the Leading-Edge Vortex (LEV) as the wind direction changes. Velocity data at mid-height showed the progressive reversal of flow direction as the LEV grew, with the strongest reversed flows occurring at the more windward location for a short duration with a magnitude more than twice that which might be expected from the mean observations. Similarly, the pressures exhibited a pattern of sequential increase in suction as the LEV developed, with the highest peak usually occurring at the windward tap. Pressures from two of the taps on the windward face are used to provide a local estimate of the wind dynamic pressure and wind direction, since reference data from a remote mast fails to give sufficiently accurate information to relate to short duration events. Conditional averaging is used to highlight the underlying patterns associate with the pressure spikes. This shows a clear pattern of strong suctions occurring near the windward edge and then weakening as the LEV develops and spreads across the face of the sidewall.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106180"},"PeriodicalIF":4.2,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680216","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
Balancing protection and risk: Understanding the dual impact of trees on low-rise buildings during extreme wind events 平衡保护和风险:了解极端风事件中树木对低层建筑的双重影响
IF 4.2 2区 工程技术
Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-16 DOI: 10.1016/j.jweia.2025.106179
Haitham A. Ibrahim , Fahim Ahmed , Omar Metwally , Amal Elawady , Jean-Paul Pinelli
{"title":"Balancing protection and risk: Understanding the dual impact of trees on low-rise buildings during extreme wind events","authors":"Haitham A. Ibrahim ,&nbsp;Fahim Ahmed ,&nbsp;Omar Metwally ,&nbsp;Amal Elawady ,&nbsp;Jean-Paul Pinelli","doi":"10.1016/j.jweia.2025.106179","DOIUrl":"10.1016/j.jweia.2025.106179","url":null,"abstract":"<div><div>This study investigates the dual role of trees in either mitigating or exacerbating wind-induced damage to low-rise buildings during extreme wind events. Trees can act as natural windbreaks that reduce wind loads, but they also pose significant risks when uprooted or broken. To explore the shielding aspect, large-scale wind tunnel tests were conducted at the Natural Hazards Engineering Research Infrastructure (NHERI) Wall of Wind (WOW) Experimental Facility. Four 1:20 scale T-shaped low-rise building models surrounded by various tree densities were tested, and wind pressures were measured across multiple directions. The results showed that trees can reduce localized peak pressure coefficients by over 50 % in certain orientations but may intensify them in others.</div><div>To quantify the risk of tree-induced damage, a built-in house Monte Carlo Simulation-based probabilistic framework was introduced. This model estimates tree failure probabilities and resulting building damage by accounting for wind speed, direction, and tree characteristics. A case study demonstrated how tree placement and wind direction critically influence damage likelihood. Fragility curves were derived to identify wind angles at which trees offer protection versus when they pose hazards. The findings of this study highlight the importance of considering both the protective and damaging effects of trees in risk assessment models. The study offers insights for enhancing urban planning and improving disaster resilience in tree-populated communities.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106179"},"PeriodicalIF":4.2,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633955","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 of relationship between the meandering flow beneath the underbody of trains and fluctuating aerodynamic force of a tail car 车体下曲流与尾车波动气动力关系的数值研究
IF 4.2 2区 工程技术
Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-15 DOI: 10.1016/j.jweia.2025.106173
Takumi Abe, Koji Nakade
{"title":"Numerical study of relationship between the meandering flow beneath the underbody of trains and fluctuating aerodynamic force of a tail car","authors":"Takumi Abe,&nbsp;Koji Nakade","doi":"10.1016/j.jweia.2025.106173","DOIUrl":"10.1016/j.jweia.2025.106173","url":null,"abstract":"<div><div>In this study, a large-eddy simulation (LES) was conducted to investigate the relationship between the meandering flow generated beneath the underbody of a 6-car train model and the unsteady lateral aerodynamic forces (fluctuating aerodynamic force) acting on the tail car. Previous studies observed meandering flow beneath the underbody through experiments, numerical simulations, and full-scale tests, and also clarified the mechanism underlying flow-induced vibration in the tunnel section. However, the relationship between the fluctuating aerodynamic force that may causes the vibration of the tail car in open air conditions and the meandering flow has not been thoroughly examined. Our numerical study found that the fluctuating aerodynamic force on the tail car was amplified when meandering flow developed. The phase-averaging method revealed that the fluctuating aerodynamic force on the tail car and meandering flow are synchronized phenomena. Mode-decomposition methods identified a three-dimensional antisymmetric mode, with a frequency close to that of the meandering flow, which generated a significant fluctuating aerodynamic force near the tail region. Based on the findings of this study, a re-evaluation of the full-scale tests of high-speed trains revealed that the concept of meandering flow offers a more comprehensive understanding of the flow behavior around tail cars.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106173"},"PeriodicalIF":4.2,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623590","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
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