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Journal of Central South University

, Volume 26, Issue 1, pp 229–240 | Cite as

Parameter optimization for improved aerodynamic performance of louver-type wind barrier for train-bridge system

  • Xu-hui He (何旭辉)
  • Dong-xu Fang (方东旭)Email author
  • Huan Li (李欢)
  • Kang Shi (史康)
Article
  • 11 Downloads

Abstract

To improve the safety of trains running in an undesirable wind environment, a novel louver-type wind barrier is proposed and further studied in this research using a scaled wind tunnel simulation with 1:40 scale models. Based on the aerodynamic performance of the train-bridge system, the parameters of the louver-type wind barrier are optimized. Compared to the case without a wind barrier, it is apparent that the wind barrier improves the running safety of trains, since the maximum reduction of the moment coefficient of the train reaches 58% using the louver-type wind barrier, larger than that achieved with conventional wind barriers (fence-type and grid-type). A louver-type wind barrier has more blade layers, and the rotation angle of the adjustable blade of the louver-type wind barrier is 90–180° (which induces the flow towards the deck surface), which is more favorable for the aerodynamic performance of the train. Comparing the 60°, 90° and 120° wind fairings of the louver-type wind barrier blade, the blunt fairing is disadvantageous to the operational safety of the train.

Key words

wind barrier aerodynamic force train-bridge system scaled wind tunnel simulation parameter optimization 

基于车-桥系统气动性能分析的百叶窗型风屏障参数优化

摘要

为提高列车在复杂风环境中行车的安全性,本文采用1:40 的缩尺模型进行风洞模拟试验,针对 提出的一种新型百叶窗型风屏障对列车和桥梁的气动影响展开研究,并基于车-桥系统气动特性对百 叶窗型风屏障的自身参数进行了优化分析。试验结果表明:设置风屏障可明显提高列车运行安全性, 设置百叶窗型风屏障相对不设置风屏障列车扭矩系数减小58%;百叶窗型风屏障的防风效果优于传统 风屏障(栅栏型和多孔型)的防风效果;百叶窗型风屏障的叶片层数较多、叶片角度旋转范围在 90°~180°范围内(使气流导向桥面)时更利于列车安全运行;百叶窗叶片风嘴较钝时不利于车桥气动 安全,其中叶片风嘴角度为60°时更优,90°时最不利。

关键词

风屏障 气动力 车-桥系统 风洞缩尺模拟 参数优化 

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Copyright information

© Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Civil EngineeringCentral South UniversityChangshaChina
  2. 2.National Engineering Laboratory for High Speed Railway ConstructionChangshaChina
  3. 3.Joint International Research Laboratory of Key Technology for Rail Traffic SafetyChangshaChina
  4. 4.China State Construction International Investments (China) LimitedShenzhenChina

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