Journal of Wind Engineering and Industrial Aerodynamics最新文献_第2页

Aerodynamic heating of evacuated tube transportation in choked flow under coupled forced convection and surface radiation 强制对流和表面辐射耦合作用下呛流中真空管输送的气动加热

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-05 DOI: 10.1016/j.jweia.2026.106333

Fuzhong Xie, Fujian Jiang, Qiujun Yu, Yanping Yuan, Jiqiang Niu

High-speed maglev trains operating within low-vacuum tubes face significant aerodynamic heating challenges, exacerbated by the inherent choked effects. Addressing the limitations of existing studies of aerothermodynamics on ETT, which focus on sole heat transfer method and flow structure under choked conditions, this paper investigates aerodynamic heating of ETT under choked conditions with coupled forced convection and surface radiation. Compared to convection only, the vehicle's surface temperature is lower under convection and radiation coupling and it declines with increasing distance from the nose, with a sharp increase at the tail, demonstrating a significant temperature gradient, while radiation heat flux generally shows an upward trend. Crucially, under supersonic flows with high blockage ratios, the vehicle's average temperature exceeds 400 K, with a temperature difference of over 100 K. The radiation heat flux at the nose becomes negative and the vehicle faces serious aerodynamic heating effects, with limited capability to radiate heat outward. While vacuum level does not govern the onset of choked flow, it significantly reduces vehicle surface temperature especially the tail temperature, particularly when pressures are below 0.2 atm. These findings enhance the comprehensive understanding of aerodynamic heating characteristics in choked flows, informing the design of ETT's thermal protection systems.

在低真空管中运行的高速磁悬浮列车面临着巨大的气动加热挑战，而固有的阻塞效应加剧了这一挑战。针对现有的空气热力学研究局限于单一换热方法和堵塞条件下的流动结构，本文研究了强制对流和表面辐射耦合的堵塞条件下ETT的气动加热。与仅对流相比，对流与辐射耦合下的飞行器表面温度较低，且随距离机头距离的增加而下降，在尾部急剧上升，温度梯度明显，而辐射热通量总体呈上升趋势。至关重要的是，在高堵塞比的超音速流动下，车辆的平均温度超过400k，温差超过100k。机头处的辐射热通量变为负值，飞行器面临严重的气动加热效应，向外辐射热量的能力有限。虽然真空度不能控制阻塞流的发生，但它可以显著降低车辆表面温度，特别是尾部温度，特别是当压力低于0.2 atm时。这些发现增强了对阻塞流中气动加热特性的全面理解，为ETT热保护系统的设计提供了信息。

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引用次数: 0

Comparison of aerodynamic force characteristics for closed-box girder under vortex-induced vibration condition between free-vibration and fixed states 自由振动与固定状态下涡激振动闭箱梁气动力特性比较

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-02 DOI: 10.1016/j.jweia.2025.106325

Zhimin Chai , Genshen Fang , Yongxin Yang , Zuopeng Wen , Shipeng Gao , Rushen Su , Xinhua Liu , Yaojun Ge

Closed-box girders have been widely used in long-span bridges due to their excellent aerodynamic performance. However, the installation of ancillary facilities may trigger significant vortex-induced vibrations (VIV). This study employed synchronous pressure and vibration measurement in a wind tunnel test on both free-vibration and fixed sectional models. The aim of this study is to obtain surface pressure distributions under several different conditions. The aerodynamic force was determined by summing the distributed pressures of both free-vibration and fixed models. The distribution characteristics of the forces were investigated through analysis of the mean pressure coefficients, fluctuating pressure coefficients and the correlation between distributed pressure and the overall force. Moreover, the Variational Mode Decomposition (VMD) method was utilized to conduct a subcomponent decomposition analysis of the aerodynamic force. The results demonstrated that the VIV responses of the closed box girder were found to be significantly influenced by the layout of the maintenance rails. The process of VIV can be divided into three distinct stages: initiation, development and stable stage. Subcomponent analysis concluded that energy from aerodynamic forces increased with vibration amplitude, while fixed-model energy remained at a low level, implying a balance between energy input and dissipation during limit-cycle oscillations. The results of the subcomponent analysis indicate the critical role of the aerodynamic force in the excitation of VIV. Among the subcomponents of the aerodynamic forces, the subcomponent with a center frequency most closely aligned with the natural frequency of the structure is most closely associated with the excitation of the vortex-induced vibrations.

闭箱梁以其优异的气动性能在大跨度桥梁中得到了广泛的应用。然而，辅助设施的安装可能会引发严重的涡激振动（VIV）。本研究在风洞试验中对自由振动和固定截面模型进行了同步压力和振动测量。本研究的目的是获得几种不同条件下的表面压力分布。气动力由自由振动模型和固定模型的分布压力之和确定。通过分析平均压力系数、波动压力系数以及分布压力与整体力的相关性，研究了受力的分布特征。此外，利用变分模态分解（VMD）方法对气动力进行子分量分解分析。结果表明：闭式箱梁的振动响应受维护轨布置的显著影响。VIV的过程可分为起始、发展和稳定三个阶段。子分量分析表明，气动力能量随振动幅值的增加而增加，而固定模型能量保持在较低水平，说明极限环振动过程中能量输入与耗散达到平衡。子分量分析结果表明，气动力对涡激飞行器的激励起着至关重要的作用。在气动力的子分量中，中心频率与结构固有频率最接近的子分量与涡激振动的激发关系最密切。

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引用次数: 0

A LiDAR-CFD-wind tunnel integrated framework for urban wind field reconstruction: The SEG Plaza case 城市风场重建的激光雷达- cfd -风洞集成框架：SEG广场案例

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2026-01-02 DOI: 10.1016/j.jweia.2025.106329

Jiazhi Yan , Qingke Han , Lijun Yuan , Zhihui Wang , Yanlong Guo , Kunbo Wen , Xianfeng Yu , Muguang Liu , Yi Yang

Accurate simulation of boundary layer wind fields is crucial for analyzing structural wind effects, particularly for super-tall buildings in complex urban settings. This study addresses wind field reconstruction and validation challenges, focusing on the “5·18″ wind-induced vibration event at SEG Plaza, Shenzhen. It integrates field measurements, wind tunnel experiments, and numerical simulations, using a refined urban model within a 500-m radius. Results are compared with Doppler lidar data and detailed simulations to establish an evaluation framework. The study also examines wind field reconstruction with limited surrounding building data. Key findings include: 1) Wind tunnel results closely match LiDAR measurements above 200 m, with a correlation coefficient of 0.975 (RMSE 0.021); 2) The average wind speed profile exponent from wind tunnel tests is 0.30, with speeds at 350 m ranging from 10.30 to 10.72 m/s; 3) A simplified 200-m radius model can capture key high-altitude wind field traits; 4) Numerical simulations with equilibrium inflow conditions outperform wind tunnel tests when urban data is scarce. This “field measurement – numerical simulation – physical simulation validation” approach will offer a wind field reconstruction method for analyzing sudden wind event.

边界层风场的精确模拟是分析结构风效应的关键，特别是对于复杂城市环境中的超高层建筑。本研究以深圳SEG广场“5·18″”风致振动事件为研究对象，解决了风场重建和验证的挑战。它集成了现场测量、风洞实验和数值模拟，使用了半径500米范围内的精细城市模型。结果与多普勒激光雷达数据和详细的模拟进行了比较，以建立评估框架。该研究还研究了在有限的周围建筑数据下的风场重建。主要发现包括：1)风洞测量结果与200 m以上激光雷达测量结果吻合较好，相关系数为0.975 (RMSE 0.021)；2)风洞试验平均风速廓线指数为0.30,350 m风速范围为10.30 ~ 10.72 m/s；3)简化的200 m半径模型可以捕捉高空风场的关键特征；4)当城市数据稀缺时，平衡入流条件下的数值模拟效果优于风洞试验。这种“现场测量-数值模拟-物理模拟验证”的方法将为分析突发性风事件提供一种风场重建方法。

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引用次数: 0

Validation of rooftop wind measurements in the urban environment: Comparison between wind tunnel results and field data 城市环境中屋顶风测量的验证：风洞结果与现场数据的比较

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-31 DOI: 10.1016/j.jweia.2025.106322

Sean McTavish, Hali Barber, Alanna Wall

Urban airflow characteristics from a full-scale field test were compared to those from a model-scale wind tunnel test to validate the use of model-scale data in the development of urban airflows guidance and recommendations. Rooftop-mounted anemometer measurements were acquired during a field study conducted in Montréal, Canada in 2023, and wind-tunnel data were acquired at the same relative rooftop-anemometer locations using a 1:300 scale model. The comparison between the field study and wind-tunnel test was enabled by identifying a compatible set of reference conditions. The airflow properties, including the mean wind speed, turbulence intensity, and flow angularity, had better agreement between field data and wind-tunnel data for the buildings that were in the core of the urban environment, where building wakes are the dominant flow feature. Flow speed and turbulence intensity were often higher in the field than in the wind tunnel, although the general trends in these parameters were predicted adequately overall. The use of airport-weather station data as the reference conditions in the field was shown to be a practical approach in the absence of a local reference in the city. A comparison of the velocity spectra between the field test and the wind-tunnel test showed good agreement over the range of full-scale frequencies that are related to typical building-widths and to the size of future urban air mobility vehicles.

将来自全尺寸现场测试的城市气流特性与模型尺度风洞测试的结果进行比较，以验证模型尺度数据在城市气流指导和建议开发中的应用。2023年在加拿大montracimal进行的实地研究中获得了安装在屋顶上的风速仪的测量数据，并使用1:300比例模型在相同的相对屋顶风速仪位置获得了风洞数据。通过确定一组兼容的参考条件，可以将现场研究与风洞试验进行比较。在城市环境的核心位置，建筑尾迹是主要的气流特征，现场数据和风洞数据吻合较好，包括平均风速、湍流强度和气流角。尽管这些参数的总体趋势在总体上得到了充分的预测，但在野外的流速和湍流强度往往高于风洞。使用机场气象站数据作为实地的参考条件被证明是在城市缺乏当地参考条件的情况下的一种实用方法。现场试验和风洞试验的速度谱比较表明，在与典型建筑物宽度和未来城市空中交通工具尺寸相关的全尺寸频率范围内，速度谱的一致性很好。

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引用次数: 0

Experimental investigation of dynamic response characteristics of metal roof panels under wind-hail interaction effects 风雹作用下金属屋面板动力响应特性试验研究

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-31 DOI: 10.1016/j.jweia.2025.106331

Juncai Chen , Yimin Dai , Taiting Liu , Lipeng Yuan , Yilin Peng

Hail disasters, a typical extreme weather event, are often accompanied by strong winds. Wind speed variations significantly affect the dynamic response of metal roof panels subjected to hail impact, highlighting the need to investigate wind-hail interaction effects. This study systematically investigates the dynamic responses of typical metal roof panels under wind-hail interaction through impact testing and numerical simulations. Results show that the influence of wind amplifies stress, strain, and displacement responses, with the effect closely related to hail diameter: smaller hail experiences stronger wind influence, while the effect diminishes as hail size increases. To accurately simulate the hail impact process, a fluid–structure interaction model was developed in LS-DYNA, showing excellent agreement with experimental data. Comparison with a simplified model indicates that both models can accurately predict the dynamic responses under small-diameter hail impacts, but the simplified model tends to overestimate structural responses for larger hail. Additionally, a displacement prediction model considering wind-hail interaction was developed using multivariate nonlinear regression analysis. The model exhibits good predictive capability under conventional conditions (hail diameters below 58 mm; wind speeds of 0–15 m/s). This study provides a useful reference for the hail-resistant design and risk assessment of metal roofing systems.

冰雹灾害是一种典型的极端天气事件，通常伴随着强风。风速变化显著影响冰雹冲击下金属屋面板的动态响应，突出了研究风-雹相互作用效应的必要性。通过冲击试验和数值模拟，系统研究了典型金属屋面板在风雹作用下的动力响应。结果表明：风的影响放大了冰雹的应力、应变和位移响应，其效应与冰雹直径密切相关，较小的冰雹受风的影响更强，而随着冰雹尺寸的增大，风的影响逐渐减弱；为了准确模拟冰雹撞击过程，在LS-DYNA中建立了流固耦合模型，与实验数据吻合良好。与简化模型的对比表明，两种模型都能准确预测小直径冰雹冲击下的结构响应，但简化模型对大直径冰雹的结构响应有高估的倾向。此外，利用多元非线性回归分析建立了考虑冰雹相互作用的位移预测模型。该模型在常规条件下（冰雹直径小于58 mm，风速0 ~ 15 m/s）具有较好的预测能力。该研究为金属屋面系统的抗冰雹设计和风险评估提供了有益的参考。

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引用次数: 0

A multi-objective reinforcement learning optimization method for interior desired pressure in plateau oxygen-supply trains under extreme tunnel conditions 极端隧道条件下高原供氧列车内部期望压力的多目标强化学习优化方法

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-31 DOI: 10.1016/j.jweia.2025.106324

Lu Yang , Chunjun Chen , Xinhua Xiang , Boyuan Mu , Yutao Xia

When plateau oxygen-supply trains pass through extreme tunnels, the passive control method for interior pressure fluctuations of the train fails to effectively balance passenger pressure comfort and air quality inside the carriage. To address above issues, this paper formulates the multi-objective optimization problem for desired interior pressure as a constrained Markov decision process (CMDP). A multi-objective reinforcement learning (RL) optimization method is proposed to obtain desired interior pressures under different tunnel conditions. By introducing the Lagrange function, the constraints (including interior oxygen partial pressure, interior pressure comfort standards, and valve opening restrictions) are integrated into the actor network. Furthermore, prior control knowledge from the iterative learning control (ILC) method is integrated to assist the RL algorithm in accelerating convergence and ensuring safe policy exploration. Finally, simulation and experimental results show that the proposed method successfully generates an interior pressure trajectory that satisfies both the oxygen partial pressure and pressure comfort standards while maximizing valve openings and keeping them within acceptable limits. This provides the desired tracking objective for designing the control algorithm for interior pressure fluctuations under tunnel pressure wave excitations.

高原供氧列车通过极端隧道时，列车内部压力波动的被动控制方法无法有效平衡乘客压力舒适性和车厢内空气质量。为了解决上述问题，本文将期望内部压力的多目标优化问题表述为约束马尔可夫决策过程（CMDP）。提出了一种多目标强化学习（RL）优化方法，以获得不同隧道条件下的理想内压力。通过引入拉格朗日函数，将约束（包括内部氧分压、内部压力舒适标准和阀门开度限制）集成到actor网络中。此外，集成了迭代学习控制（ILC）方法的先验控制知识，以帮助RL算法加速收敛并确保安全策略探索。最后，仿真和实验结果表明，该方法成功地生成了满足氧分压和压力舒适性标准的内部压力轨迹，同时最大限度地使阀门开度保持在可接受的范围内。这为设计隧道压力波激励下的内部压力波动控制算法提供了理想的跟踪目标。

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引用次数: 0

Impact of inflow turbulence and flow Reynolds number on the flow around an isolated building under unstable conditions 不稳定条件下流入湍流度和流动雷诺数对孤立建筑物周围流动的影响

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-29 DOI: 10.1016/j.jweia.2025.106326

Yezhan Li , Sankang Yin , Naoki Ikegaya

Turbulent inflow is essential for obtaining accurate results in large-eddy simulations of the urban wind environment. However, under unstable conditions, the relative importance of inflow turbulence and Reynolds number remains unclear. This study investigates the effects of five inflow turbulence types and five Reynolds numbers (Re = 1500–150000), obtained by varying the kinematic viscosity, on the flow fields around an isolated building. Results show that at a high Reynolds number (Re = 15000), different inflow turbulence conditions produce similar wake pattern. Varying the Reynolds number has minimal influence on the velocity fields under turbulent inflow, whereas non-turbulent inflow exhibits strong Reynolds number sensitivity, especially in the wake. For the temperature field, lower Reynolds numbers lead to higher temperatures and stronger fluctuations due to the increased wall heat transfer. These findings suggest that while turbulent inflow is essential for accurately resolving flow features in front of the building, non-turbulent inflow may be sufficient for studies focusing on mean and standard deviation fields in the wake at high Reynolds numbers. For simulations involving both velocity and temperature, inflow with fluctuations in both is recommended, though using velocity fluctuations with a representative temperature profile can still provide reasonable accuracy.

在城市风环境的大涡模拟中，湍流入流是获得准确结果的关键。然而，在不稳定条件下，流入湍流度和雷诺数的相对重要性尚不清楚。本文研究了通过改变运动粘度得到的五种流入湍流类型和五种雷诺数（Re = 1500-150000）对孤立建筑物周围流场的影响。结果表明，在高雷诺数（Re = 15000）下，不同的流入湍流条件产生的尾迹相似。在紊流条件下，雷诺数的变化对速度场的影响很小，而在非湍流条件下，雷诺数的变化对速度场具有很强的敏感性，特别是在尾流中。对于温度场而言，由于壁面换热增加，雷诺数越低，温度越高，波动也越大。这些发现表明，虽然湍流流入对于精确解析建筑物前的流动特征至关重要，但对于高雷诺数尾迹的平均和标准差场的研究来说，非湍流流入可能已经足够了。对于同时涉及速度和温度的模拟，建议使用两者都有波动的流入，尽管使用具有代表性温度剖面的速度波动仍然可以提供合理的精度。

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引用次数: 0

A user-friendly graphical user interface (GUI) of wall jet analytical and semi-empirical models of downbursts 一个用户友好的图形用户界面（GUI）的壁射流分析和半经验模型下爆

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-26 DOI: 10.1016/j.jweia.2025.106323

Katya Britton, Djordje Romanic

Downbursts are intense, often damaging, winds produced by downdrafts from storms that strike the ground and spread outward in all directions. Near the surface, the flow characteristics of downburst outflows closely resemble those of an impinging jet spreading over a flat surface, a well-known phenomenon in experimental fluid mechanics. Key features such as high wind speeds, nose-shaped vertical profiles of mean velocity, abrupt shifts in wind direction, and non-Gaussian velocity distributions make downbursts a significant hazard to certain structures. Owing to their resemblance to impinging jets, downbursts have been modeled using various analytical and semi-empirical formulations, which are now commonly used in wind engineering to evaluate structural loads and environmental impacts. This short communication introduces a simple and intuitive MATLAB® software tool that integrates nine well-documented models of downburst-like impinging jets. The tool allows users to visualize radial and vertical profiles of the mean wind components and to export both plots and data in multiple formats. Its interactive interface enables easy adjustment of key model parameters, enhancing usability for research and engineering applications.

下爆是由风暴撞击地面并向四面八方扩散的下沉气流产生的强烈的、通常具有破坏性的风。在接近表面的地方，下爆流出的流动特性与在平面上扩散的撞击射流非常相似，这是实验流体力学中众所周知的现象。高风速、平均速度的鼻形垂直剖面、风向的突变和非高斯速度分布等关键特征使降爆对某些结构构成重大危害。由于它们与撞击射流的相似性，下爆已经使用各种分析和半经验公式进行建模，这些公式现在通常用于风工程中评估结构载荷和环境影响。这篇简短的通信介绍了一个简单直观的MATLAB®软件工具，该工具集成了九个记录良好的下爆式撞击射流模型。该工具允许用户可视化平均风分量的径向和垂直剖面，并以多种格式导出图和数据。其交互界面可以轻松调整关键模型参数，增强研究和工程应用的可用性。

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引用次数: 0

AIJ guidelines on the applications of large-eddy simulation to pedestrian wind environment: Recommendations and validation benchmarks AIJ大涡模拟在行人风环境中的应用指南：建议和验证基准

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-24 DOI: 10.1016/j.jweia.2025.106321

Tsubasa Okaze , Hideki Kikumoto , Naoki Ikegaya , Keisuke Nakao , Hiroki Ono , Keigo Nakajima , Masashi Imano , Takamasa Hasama , Yuichi Tabata , Takeshi Kishida , Ryuichiro Yoshie , Yoshihide Tominaga

This study introduces recent efforts of the Architectural Institute of Japan (AIJ) to develop guidelines for large-eddy simulation (LES) of pedestrian wind environments (PWEs). Reynolds-averaged Navier–Stokes (RANS) models have been widely used for predicting urban wind environments following best practice guidelines (BPGs) by Franke et al. [Int J Environ Pollut 44, 1–4 (2011)] and Tominaga et al. [J Wind Eng Ind Aerodyn 96 (10–11), 1749–1761 (2008)]. Although RANS models can predict mean wind velocity and some turbulence statistics based on empirical assumptions, LES provides higher accuracy in resolving transient turbulence structures larger than the grid scale. With increasing urbanization, understanding instantaneous complex wind and wind-related phenomena around buildings is essential for ensuring pedestrian wind comfort and safety. However, LES applications face challenges owing to a lack of BPGs. This study outlines key recommendations for simulation setups and post-processing, including domain size, building modeling, grid generation, boundary conditions, turbulence modeling, discretization, convergence criteria, and reliability evaluation. Additionally, new benchmark cases are provided to support validation for PWEs. The AIJ working group systematically evaluated LES performance across urban scenarios to ensure practical applicability while balancing computational costs. These guidelines aim to enhance prediction reliability, thereby contributing to the standardization of LES applications for PWE and advancement of computational wind engineering.

本研究介绍了日本建筑研究所（AIJ）最近为行人风环境（pwe）的大涡模拟（LES）制定指南所做的努力。张建军，张建军，张建军，等。基于RANS模型的城市风环境预测研究[J].环境科学学报，2011,31(2):559 - 561（2008）。虽然RANS模型可以预测平均风速和一些基于经验假设的湍流统计数据，但LES在解决大于网格尺度的瞬态湍流结构方面提供了更高的精度。随着城市化进程的加快，了解建筑物周围的瞬时复杂风和风相关现象对于确保行人的风舒适和安全至关重要。然而，由于缺乏bpg， LES应用面临挑战。本研究概述了模拟设置和后处理的关键建议，包括域大小、建筑建模、网格生成、边界条件、湍流建模、离散化、收敛准则和可靠性评估。此外，还提供了新的基准用例来支持pwe的验证。AIJ工作组系统地评估了LES在城市场景中的性能，以确保在平衡计算成本的同时具有实际适用性。这些指南旨在提高预测的可靠性，从而有助于LES应用于PWE的标准化和计算风工程的进步。

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引用次数: 0

Human mobility-induced particulate dispersion mechanisms in urban transit hubs 城市交通枢纽中人类流动性诱导的颗粒物扩散机制

IF 4.9 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics

Pub Date : 2025-12-19 DOI: 10.1016/j.jweia.2025.106318

Yongzhi Zhang , Zhibin Tian , Yi Yuan , Wenqian Lu , Xiaoli Pan , Yan Huang

Commuter exposure to particulate matter (PM) in confined subway stations poses significant risks to public health. The spatial distribution of the PM is strongly influenced by passenger-induced wake flows, yet its role in PM transport dynamics remains poorly characterized. This study investigates the impact of passenger wake flows on PM transport within commuting subway cabins via computational fluid dynamics (CFD), employing the dynamic mesh method and the Eulerian‒Lagrangian method to track PM trajectories. The results indicated that the wake flow fields can significantly enhance particulate matter migration, leading to a 132 % increase in PM 2.5 influx into the cabin compared with unoccupied scenarios. Entrained particles primarily accumulate near doorway regions—critical transition zones between moving and stationary passenger groups—where door-closing-induced airflow disturbances further promote their dispersion toward exhaust outlets. These results elucidate the mechanisms by which passenger behavior modulates subway cabin air quality, providing actionable insights for optimizing ventilation system design and mitigating passenger PM exposure risk.

通勤者在密闭的地铁站接触颗粒物（PM）对公众健康构成重大风险。PM的空间分布受到乘客诱导的尾流的强烈影响，但其在PM运输动力学中的作用仍不清楚。本研究利用计算流体动力学（CFD）方法，采用动态网格法和欧拉-拉格朗日方法跟踪地铁客舱内乘客尾流对PM运输的影响。结果表明，尾流场可以显著增强颗粒物的迁移，导致pm2.5流入舱内的量比无人情况下增加了132%。夹带颗粒主要聚集在门口附近，这是移动和静止乘客群体之间的关键过渡区，在那里，关门引起的气流干扰进一步促进了它们向排气口扩散。这些结果阐明了乘客行为调节地铁客舱空气质量的机制，为优化通风系统设计和降低乘客PM暴露风险提供了可行的见解。

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引用次数: 0