3D ultrasonic anemometer array reveals jet flow structures at the entrance of high-speed railway tunnel

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2025-02-01 DOI:10.1016/j.jweia.2024.106004

E Deng , Xin-Yuan Liu , De-Hui Ouyang , Huan Yue , Yi-Qing Ni

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引用次数: 0

Abstract

High-speed trains (HSTs), traveling at speeds of up to 300 km/h, are subjected to safety risks in crosswind conditions, particularly when they enter or exit tunnels due to transient aerodynamic effects. The study employs a three-dimensional (3D) ultrasonic anemometer array positioned at the tunnel entrance to investigate the jet flow structure and its 3D characteristics that are induced by HSTs as they enter tunnels. The main results are as follows: The jet flow speed reaches approximately 3%–7% of the train's operational speed, with a maximum length of around 0.48 L. When the train speed is increased from 300 km/h to 400 km/h, the effect of its slipstream on the surrounding wind speed increases by 33% upon entering the tunnel, while in the jet flow section, the wind speeds from both sources are comparable. Through field measurement and numerical simulation, this study provides better understanding of the characteristics of the 3D jet flow structure generated from HSTs entering tunnels, thus offering more insight in developing means for reducing jet flows.

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来源期刊

Journal of Wind Engineering and Industrial Aerodynamics 工程技术-工程：土木

CiteScore

8.90

自引率

22.90%

发文量

306

审稿时长

4.4 months

期刊介绍： The objective of the journal is to provide a means for the publication and interchange of information, on an international basis, on all those aspects of wind engineering that are included in the activities of the International Association for Wind Engineering http://www.iawe.org/. These are: social and economic impact of wind effects; wind characteristics and structure, local wind environments, wind loads and structural response, diffusion, pollutant dispersion and matter transport, wind effects on building heat loss and ventilation, wind effects on transport systems, aerodynamic aspects of wind energy generation, and codification of wind effects. Papers on these subjects describing full-scale measurements, wind-tunnel simulation studies, computational or theoretical methods are published, as well as papers dealing with the development of techniques and apparatus for wind engineering experiments.