An experimental investigation on the large-scale meandering flow structure causing FIV of high-speed trains running in tunnels

IF 4.2 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Wind Engineering and Industrial Aerodynamics Pub Date : 2024-09-21 DOI:10.1016/j.jweia.2024.105899

Yutaka Sakuma , Koji Nakade , Masahiro Suzuki

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引用次数: 0

Abstract

To verify the existence of the large-scale meandering flow structure that causes flow-induced vibration (FIV) of high-speed trains traveling in tunnels, the vertical flow velocities on the sides of the cars of a high-speed train running in a tunnel and in the open air are estimated by a simple method of tuft visualization in running experiments on a real train without conducting large-scale measurements. Tufts are attached to the side windows of the 3rd and the 14th car of the 16-car Shinkansen train, and the mean and peak values of vertical flow velocity fluctuations are estimated from the movement of the tufts. First, the steady flow field around the 16-car train is estimated from the mean values of vertical flow velocity fluctuations. Then, the existence of the large-scale meandering flow structure along the train traveling in the tunnel is identified from the peak values by comparing the results between the numerical simulation of previous research and the running experiments. The results of this study support the validity of the mechanism proposed in the numerical simulation, in which the large-scale meandering flow structure is formed along the train traveling in the tunnel, generating aerodynamic forces acting on the sides of the car.

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引起隧道内高速列车 FIV 的大尺度蜿蜒流结构实验研究

为了验证引起隧道内高速列车流动诱发振动（FIV）的大尺度蜿蜒流动结构的存在，在没有进行大规模测量的情况下，在实际列车运行实验中，通过简单的簇状可视化方法估算了隧道内和露天运行的高速列车车厢两侧的垂直流速。在 16 节车厢新干线列车的第 3 节和第 14 节车厢的侧窗上安装了簇绒，通过簇绒的运动估算垂直流速波动的平均值和峰值。首先，根据垂直流速波动的平均值估算出 16 节车厢列车周围的稳定流场。然后，通过对比前人研究的数值模拟结果和运行实验结果，从峰值上确定了列车在隧道内行驶过程中存在的大尺度蜿蜒流动结构。研究结果支持了数值模拟中提出的机理的正确性，即列车在隧道中行驶时形成大尺度蜿蜒流动结构，产生作用于车厢两侧的空气动力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.