Unraveling the impact of cutting transition section on the aerodynamic loads of high-speed trains: Utilizing the IDDES approach

Lun Zhao, E. Deng, Wei Chao Yang, Yi Qing Ni, Wen Zhao, Lu Sen Luo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

The aerodynamic load of high-speed trains (HSTs) undergoes significant changes when they pass through the transition section of the cutting under crosswind conditions. This paper establishes a coupled train-cutting-wind three-dimensional aerodynamic model based on the improved delayed detached eddy simulation turbulence model, focusing on the influence of the cutting depth on the change of aerodynamic load and the deterioration of the train’s aerodynamic performance, while also revealing the mechanism of the evolution of the flow field. The results indicate that at the cutting depth of 6 m, the aerodynamic impact energy of the head train during operation is at its highest. As the train completely enters the next operational scenario, with an increase in the cutting depth, the impact of incoming flow on the aerodynamic loads of the train is diminished, leading to a corresponding reduction in fluctuation amplitude. The magnitude of the head train’s abrupt change in aerodynamic load has a near-linear positive correlation with the wind speed.

Original languageEnglish
Pages (from-to)989-1002
Number of pages14
JournalJournal of Central South University
Volume31
Issue number3
DOIs
Publication statusPublished - Mar 2024

Keywords

  • aerodynamic load
  • crosswind
  • cutting transition section
  • flow field
  • high-speed trains

ASJC Scopus subject areas

  • General Engineering
  • Metals and Alloys

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