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

Numerical simulation on the influence of obstruction characteristics on ventilation during tunnel construction 隧道施工中障碍物特性对通风影响的数值模拟

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.2025.106178

Xiaoke Chang , Jieying Qiao , Rong Yang , Jianxi Ren

{"title":"Numerical simulation on the influence of obstruction characteristics on ventilation during tunnel construction","authors":"Xiaoke Chang , Jieying Qiao , Rong Yang , Jianxi Ren","doi":"10.1016/j.jweia.2025.106178","DOIUrl":"10.1016/j.jweia.2025.106178","url":null,"abstract":"<div><div>Many pollutants will be released during the construction of the tunnel. The obstructions formed by scaffolding and locomotives have an impact on the emission of pollutants that is difficult to ignore. Accurately estimating the required air volume of tunnel ventilation during construction period is helpful to ensure construction safety and efficiency, and plays an important role in resource utilization and economic sustainability. In this study, a tunnel model with different obstruction parameters was established by numerical method. The length of obstruction, the location of obstruction and the blocking rate were discussed respectively. The results show that the energy loss of the fan is proportional to the blocking rate and the length of the obstruction, and inversely proportional to the distance between the obstruction and the working face. Based on the discharge mechanism of pollutants in the tunnel, the modified formula of the air volume required for the tunnel to eliminate the smoke is derived considering the influence of the obstruction on the energy consumption of the fan. The content of this study provides a theoretical basis for estimating the accurate air demand, which is of great significance for optimizing the operation of the ventilation system during the construction period, reducing power consumption and reducing carbon emissions.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106178"},"PeriodicalIF":4.2,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623591","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

Impact of inclined porous media hoods on micro-pressure waves induced by high-speed maglev trains traversing tunnels 倾斜多孔介质罩对高速磁悬浮列车穿越隧道微压力波的影响

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-14 DOI: 10.1016/j.jweia.2025.106175

Kaiwen Wang , Xiaohui Xiong , Guang Chen , Xifeng Liang , Lei Zhang , Bo Sun , Rudai Xue

{"title":"Impact of inclined porous media hoods on micro-pressure waves induced by high-speed maglev trains traversing tunnels","authors":"Kaiwen Wang , Xiaohui Xiong , Guang Chen , Xifeng Liang , Lei Zhang , Bo Sun , Rudai Xue","doi":"10.1016/j.jweia.2025.106175","DOIUrl":"10.1016/j.jweia.2025.106175","url":null,"abstract":"<div><div>The high-speed maglev train traversing tunnels will cause noise pollution to the surrounding environment. Utilizing inclined porous media hoods (IPMHs) is an effective solution for mitigating micro-pressure waves (MPWs). This study employs an improved delayed detached eddy simulation turbulence model and overset technique to simulate the aerodynamic effects of maglev trains passing through tunnels. The reliability of the numerical method is validated through moving-model experimental data. The study investigates the influence of IPMH slope and location on wavefront characteristics and MPW evolution. The peak cut principle of the entrance IPMH and the exit pressure relief on the MPW amplitude are discussed. The research results indicate that the entrance IPMH achieves the effects of extending the wavefront rise time and achieving balance in the multi-peak wavefront gradient. The exit IPMH can regulate the balance between pressure relief amplitude and MPW amplitude by controlling its slope. IPMH causes the MPW profile to undergo three evolutionary stages: semi-frustum, semi-gourd shape, and semi-ellipsoid. Reducing the IPMH slope benefits increasing the solid radiation angle to facilitate pressure relief. The mitigation rates of MPW amplitude achieved by the entrance, exit, and side IPMHs are 52.2 %, 70.0 %, and 86.1 % respectively. The findings offer valuable references for the design of high-speed maglev tunnel hoods.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106175"},"PeriodicalIF":4.2,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614718","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

Aero-structural design of bridge decks under synoptic and non-synoptic winds via aeroelastic surrogates comprising shape, reduced velocity, and mean angle of attack 在天气风和非天气风的作用下，通过气动弹性代替物进行桥面的气动结构设计，包括形状、减速速度和平均迎角

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-14 DOI: 10.1016/j.jweia.2025.106133

Sumit Verma, Miguel Cid Montoya, Ashutosh Mishra

{"title":"Aero-structural design of bridge decks under synoptic and non-synoptic winds via aeroelastic surrogates comprising shape, reduced velocity, and mean angle of attack","authors":"Sumit Verma, Miguel Cid Montoya, Ashutosh Mishra","doi":"10.1016/j.jweia.2025.106133","DOIUrl":"10.1016/j.jweia.2025.106133","url":null,"abstract":"<div><div>Wind-sensitive bridges are commonly designed based on their aeroelastic responses under synoptic winds. However, a holistic aero-structural design framework must address all potential wind scenarios along the bridge life cycle, including non-synoptic events and synoptic winds with relevant variations in the mean angle of attack due to wind-induced static deck deformation or complex terrain effects. This requires the evaluation of the aeroelastic responses considering the sensitivity of the fluid-structure interaction parameters to the wind angle of attack. Aiming at properly modeling these effects within design frameworks, this study proposes harnessing a multi-directional aeroelastic Kriging surrogate trained with forced vibration CFD simulations to emulate the flutter derivatives as a function of the deck shape, reduced velocity, and mean angle of attack. A bridge deck with a variable depth ranging from streamlined to bluff configurations is studied in detail, showing drastic changes in relevant flutter derivatives. The deck shape drives the impact of the mean angle of attack in some critical flutter derivatives, including the occurrence of <em>A</em><sub><em>2</em></sub><em>∗</em> sign flipping, with its implications in the torsional stability. The resulting aeroelastic surrogate is conceived to be integrated into aero-structural optimization frameworks for optimally shaping bridge decks under synoptic and non-synoptic wind scenarios.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106133"},"PeriodicalIF":4.2,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614722","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

Mixture Gram–Charlier series method for modelling wind velocity probability distribution in actual urban environments 混合Gram-Charlier级数法模拟实际城市环境中风速概率分布

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-12 DOI: 10.1016/j.jweia.2025.106172

Wei Wang, Yezhan Li, Naoki Ikegaya

{"title":"Mixture Gram–Charlier series method for modelling wind velocity probability distribution in actual urban environments","authors":"Wei Wang, Yezhan Li, Naoki Ikegaya","doi":"10.1016/j.jweia.2025.106172","DOIUrl":"10.1016/j.jweia.2025.106172","url":null,"abstract":"<div><div>Understanding probabilistic features in urban wind environments is crucial. While previous studies have used the Gram–Charlier series (GCS) method to model the probability distribution functions (PDFs) of wind speed, their accuracy is often limited for bimodal or highly-skewed PDFs. This issue becomes more pronounced when large moments cause fluctuations in the modeled PDFs. This study introduces the mixture GCS method for modeling the PDFs of wind velocity components and wind speed. Time-series data derived from a large eddy simulation (LES) of an actual urban area (Niigata City, Japan), were analyzed. This study focuses on two mixture GCS methods: GCS2-2 (combining two Gaussian distributions) and GCS2-3 (combining a Gaussian distribution and a third-order GCS model). While GCS methods effectively model symmetric PDFs, the mixture GCS methods excel at capturing bimodal and skewed PDFs, with GCS2-3 proving more accurate than GCS2-2. Compared to GCS-6th, GCS2-3 achieves a more accurate maximum mean absolute error (<span><math><mrow><mtext>MAE</mtext></mrow></math></span>), reducing it by over 50%. For nearly symmetric unimodal PDFs, traditional GCS methods suffice, but for cases with large higher-order moments, mixture GCS methods are recommended to avoid accuracy loss. This study is expected to provide valuable insights for probabilistic modeling of urban wind environments.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106172"},"PeriodicalIF":4.2,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604921","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-induced vibration and force characteristics of a downstream cylinder with two degrees of freedom influenced by upstream cylinder wake 受上游尾迹影响的二自由度下游圆柱体流激振动及力特性

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-08 DOI: 10.1016/j.jweia.2025.106163

Yan-Jiao Guo , Xiang-Wei Min , Wen-Li Chen

{"title":"Flow-induced vibration and force characteristics of a downstream cylinder with two degrees of freedom influenced by upstream cylinder wake","authors":"Yan-Jiao Guo , Xiang-Wei Min , Wen-Li Chen","doi":"10.1016/j.jweia.2025.106163","DOIUrl":"10.1016/j.jweia.2025.106163","url":null,"abstract":"<div><div>A study on 2-DOF vibration characteristics and aerodynamic forces of a downstream cylinder in staggered arrangements is conducted, with cylinder center spacings of <em>L</em>/<em>D</em> = 2.5–6.0 longitudinally and <em>T</em>/<em>D</em> = −2–0 transversely (where <em>L</em> and <em>T</em> denote longitudinal and transverse spacings, <em>D</em> denotes cylinder diameter). The investigation covers reduced velocities (<em>U</em><sub><em>r</em></sub> = <em>U</em>/(<em>f</em><sub><em>n</em></sub><em>D</em>)) from 12.5 to 72.1, where <em>U</em> is wind speed and <em>f</em><sub><em>n</em></sub> is natural frequency. Three distinct vibration forms are observed: Wake-Induced Vibration (WIV), Wake-Induced Flutter (WIF), and horizontal vibration induced by the laminar separation and turbulent reattachment (LSTR) flow pattern at inner lift peak positions, termed LHV. For WIV, tandem arrangements yield predominantly vertical oscillations with peak amplitudes reaching 1.83<em>D</em>, whereas staggered arrangements produce comparable horizontal and vertical responses at higher wind speeds. WIF characteristics include rapid amplitude growth and frequency reduction with increasing wind speed. Under the staggered arrangement of (2.5, −0.4), two distinct horizontal vibration regions emerge, driven by inner shear layer oscillation frequency lock-in and flow separation-reattachment, respectively. Force measurements during oscillation indicate unsteady characteristics in tandem arrangements but quasi-steady features in staggered cases. Additionally, consistent force-displacement phase differences observed in WIV under staggered arrangements provide valuable experimental data for future theoretical model development and validation.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106163"},"PeriodicalIF":4.2,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571931","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

Validation of urban airflow measurements through a combined field test and wind tunnel study 通过结合现场试验和风洞研究验证城市气流测量

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-08 DOI: 10.1016/j.jweia.2025.106155

Sean McTavish, Hali Barber, Alanna Wall

{"title":"Validation of urban airflow measurements through a combined field test and wind tunnel study","authors":"Sean McTavish, Hali Barber, Alanna Wall","doi":"10.1016/j.jweia.2025.106155","DOIUrl":"10.1016/j.jweia.2025.106155","url":null,"abstract":"<div><div>A combined field test and wind-tunnel study was conducted to support the ongoing development of operator guidance and recommendations for Remotely Piloted Aircraft Systems (RPAS) operations in urban airflows. The goal of the overall study was to acquire urban-airflow data in a real environment in order to validate equivalent airflow characteristics from model-scale testing. The field test was designed to measure urban airflow characteristics using anemometers mounted on a small RPAS. The RPAS was flown along various flight paths in downtown Montréal in 2023. Following the field test, airflow measurements were taken at the equivalent spatial locations in a wind tunnel using a 1:300-scale model of the same test site. Data-processing routines for the RPAS airflow measurements included accounting for the body-motion of the vehicle and applying custom calibration equations for the RPAS-mounted sonic anemometers. Comparing the RPAS and wind-tunnel measurements required a common coordinate system, a digital model of the city, and identification of compatible reference conditions. The distribution of mean flow speed and turbulence intensity from the field test compared well with the wind-tunnel results, including the shape of the distribution and location of the maxima. Additionally, the variation in flow characteristics along a flight path, such as mean flow speed and turbulence intensity, compared favourably with wind-tunnel results acquired at the same relative locations. This work demonstrates the suitability of model-scale testing for studying urban flow fields.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106155"},"PeriodicalIF":4.2,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581003","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

Two parallel cable trusses-supported photovoltaic system: Extreme wind-induced response and displacement-based gust response factors 两个平行缆索桁架支撑的光伏系统：极端风致响应和基于位移的阵风响应因子

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-07 DOI: 10.1016/j.jweia.2025.106157

Jingyao Li , Shihong Nie , Min Liu , Qingshan Yang , Kunpeng Guo

{"title":"Two parallel cable trusses-supported photovoltaic system: Extreme wind-induced response and displacement-based gust response factors","authors":"Jingyao Li , Shihong Nie , Min Liu , Qingshan Yang , Kunpeng Guo","doi":"10.1016/j.jweia.2025.106157","DOIUrl":"10.1016/j.jweia.2025.106157","url":null,"abstract":"<div><div>With the growth of the solar photovoltaic industry, cable-supported photovoltaic structures (CSPSs) have become a research focus. Gust response factor (GRF) quantifies the amplification of dynamic responses relative to mean wind responses and is crucial for designing. However, unified standards for determining the peak factor are absent, and GRFs vary widely across structural forms, necessitating focused studies on different CSPS types. This study investigates the wind-induced vibrations and GRFs of the two parallel cable trusses-supported photovoltaic systems, using tilt angle, turbulence intensity, and wind speed as variables. Displacement responses were examined by aeroelastic model tests in the wind fields with varying turbulence intensities, focusing on Gaussian or non-Gaussian properties. Peak factors were derived using the piecewise Hermite polynomial model to calculate extreme responses and GRFs. Analyses reveal that buffeting-dominated responses exhibit Gaussian characteristics, with skewness near 0, kurtosis near 3, and a peak factor around 3.9, while self-excited vibrations exhibit hardening non-Gaussian properties, with kurtosis around 1.5 and a peak factor below 2.5. Turbulence intensity, with a feature importance exceeding 0.8, is the dominant factor affecting GRFs. Empirical models incorporating turbulence intensity, wind speed, and tilt angle align well with experimental data, demonstrating engineering applicability.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106157"},"PeriodicalIF":4.2,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144571930","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

Optimizing cycling skinsuit design through an integrated wind-tunnel and CFD workflow 通过集成风洞和CFD工作流程优化自行车皮衣设计

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-04 DOI: 10.1016/j.jweia.2025.106154

Thijs van Druenen , Bert Blocken

{"title":"Optimizing cycling skinsuit design through an integrated wind-tunnel and CFD workflow","authors":"Thijs van Druenen , Bert Blocken","doi":"10.1016/j.jweia.2025.106154","DOIUrl":"10.1016/j.jweia.2025.106154","url":null,"abstract":"<div><div>This paper explores the use of computational fluid dynamics (CFD) in the design of cycling skinsuits with varying surface roughness. Traditional skinsuit design involves a complex and time-consuming process by wind tunnel experiments. CFD could potentially offer an alternative for predicting the performance and designing rider-specific skinsuits, though accurately modelling fabric surface roughness is challenging. The study characterizes skinsuit fabrics based on an equivalent sand-grain roughness height (k<sub>S</sub>) value derived from drag reduction measurements on cylinders covered with specific fabrics. Three skinsuits, created from these fabrics, are assessed on a full-scale cyclist mannequin. For two of the three suits, the calculated drag area is within 0.6 % of the wind tunnel (WT) results. In the case of the third suit, the deviation with the WT drag area is 1.6 %. The CFD simulations reveal valuable insights, such as the impact of including variable k<sub>S</sub> values on the location of flow separation, the local distribution of skin friction and pressure drag, and their effects on the near flow field. The agreement between WT and CFD results suggests the potential of CFD for designing aerodynamically optimized skinsuits for individual riders, while further research is recommended to refine and validate this approach.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106154"},"PeriodicalIF":4.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563600","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

Field measurement study on typhoon wind characteristics during strong wind periods 强风期台风风特征的野外测量研究

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-04 DOI: 10.1016/j.jweia.2025.106158

Muguang Liu , Kang Liu , Zhe Wang , Chunsheng Zhang , Zhuangning Xie

{"title":"Field measurement study on typhoon wind characteristics during strong wind periods","authors":"Muguang Liu , Kang Liu , Zhe Wang , Chunsheng Zhang , Zhuangning Xie","doi":"10.1016/j.jweia.2025.106158","DOIUrl":"10.1016/j.jweia.2025.106158","url":null,"abstract":"<div><div>Based on the wind records of seven typhoons observed from 356-m-high Shenzhen Meteorological Gradient Tower (SZMGT) between 2017 and 2023, the differences and similarities of wind characteristics during strong wind periods for these typhoons are explored. The wind parameters, involving mean wind profile, turbulence intensity, turbulence integral scale, as well as gust and peak factors are presented and discussed. Moreover, Gaussianity, vertical coherence, and power spectral density are investigated. The results indicate that the strongest 10-min wind profiles for seven typhoons generally align with those recommended in codes and standards for suburban terrain at SZMGT, while the observed turbulence intensities during typhoons are markedly larger than those given for suburban terrain. The dispersion of turbulence integral scales for different typhoon events is more pronounced than that of turbulence intensity, however, a good consistency is observed in gust factors for seven typhoons. Compared with the Solari spectrum, the von Kármán spectrum can better describe the observed power spectra of longitudinal/lateral/vertical fluctuating wind speeds during strong wind periods. Furthermore, the fluctuating wind speeds overall show reasonable agreement with the Gaussian distribution. The outcome of this study is expected to provide a useful reference for wind-resistant design of building structures in typhoon regions.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106158"},"PeriodicalIF":4.2,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144563599","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

LES study on inversion-capped atmospheric boundary layer flows over steep topography considering the effects of free-atmosphere lapse rate 考虑自由大气递减率影响的陡地形上逆温封顶大气边界层流动的LES研究

IF 4.2 2区工程技术

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-07-03 DOI: 10.1016/j.jweia.2025.106131

Tong Zhou, Takeshi Ishihara

{"title":"LES study on inversion-capped atmospheric boundary layer flows over steep topography considering the effects of free-atmosphere lapse rate","authors":"Tong Zhou, Takeshi Ishihara","doi":"10.1016/j.jweia.2025.106131","DOIUrl":"10.1016/j.jweia.2025.106131","url":null,"abstract":"<div><div>The capping temperature inversion is a common atmospheric phenomenon that strongly influences the mean flow and turbulence structures within the atmospheric boundary layer (ABL). In this study, full-scale large eddy simulations are utilized to shed light on the characteristics of inversion-capped ABL flows over steep hilly terrain. As atmospheric stratification increases, the vertical wind veer becomes stronger, creating asymmetric flow patterns in the hill wake, and the buoyancy force acts to resist turbulent wake motions. In contrast to the conventionally neutral boundary layer (CNBL) and the convective boundary layer (CBL) cases, the stable boundary layer (SBL) exhibits pronounced flow acceleration at the hilltop and a faster wake recovery on the lee side of the hill. Based on the quadrant analysis, flow separation and vortex shedding are found to enhance organized motions downstream of the hill crest. In the wake region, sweep and ejection motions are identified at different heights. Furthermore, a wind speed prediction approach is developed for inversion-capped ABL flows over steep hilly terrain under both stable and unstable stratifications. The proposed approach incorporates the effect of the free-atmosphere lapse rate. Overall, it shows satisfactory agreement in predicting mean wind speed profiles over steep hills under both CBL and SBL conditions. The overestimation of mean wind speed at the hilltop in the SBL case can be corrected using the <span><math><mrow><mi>σ</mi></mrow></math></span> coordinate transformation technique.</div></div>","PeriodicalId":54752,"journal":{"name":"Journal of Wind Engineering and Industrial Aerodynamics","volume":"265 ","pages":"Article 106131"},"PeriodicalIF":4.2,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549206","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