Influence of wind barrier on the transient aerodynamic performance of high-speed trains under crosswinds at tunnel–bridge sections

Weichao Yang, E. Deng, Xuhui He, Lusen Luo, Zhihui Zhu, Youwu Wang, Zhitang Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Porous wind barriers (PWBs) are gradually applied to tunnel–bridge–tunnel infrastructures (TBTIs) along high-speed railway lines. Due to the remarkable aerodynamic effect of high-speed trains (HSTs), the windproof performance of a PWB at tunnel–bridge section (TBS) is particularly critical when a HST passes through the TBTI under crosswind. And it seems to be easily ignored by researchers. This study aims to determine the influence mechanism of the PWB in the TBS. A CFD dynamic model of air–train–PWB was built based on porous media theory, and its reliability is verified by model and field tests. The main results are as follows: the corresponding variation amplitudes of the train’s aerodynamic load coefficients are reduced by 36–95% when a PWB is set in the TBS; adopting the same design parameters along the full-length PWB on the TBTI is unreasonable; the PWB height and porosity in the TBS must be increased and reduced more than 33%, respectively, to achieve equivalent windproof performance. The conclusions in this paper can provide a preliminary idea for the optimization design of the PWB on the TBTI.

Original languageEnglish
Pages (from-to)727-746
Number of pages20
JournalEngineering Applications of Computational Fluid Mechanics
Volume15
Issue number1
DOIs
Publication statusPublished - 2021

Keywords

  • aerodynamic coefficient
  • Crosswind
  • high-speed train (HST)
  • porous wind barrier (PWB)
  • tunnel–bridge section (TBS)

ASJC Scopus subject areas

  • Computer Science(all)
  • Modelling and Simulation

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