Submit

Login Login

Register Register

Home / Journals / FDMP / Online First / doi:10.32604/fdmp.2024.055205
Journal Menu
Special Issues
Table of Content

All issues

Online First

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

Open Access

ARTICLE

Influence of Rail Fastening System on the Aerodynamic Performance of Trains under Crosswind Conditions

Yuzhe Ma, Jiye Zhang*, Jiawei Shi
State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu, 610031, China
* Corresponding Author: Jiye Zhang. Email: email

Fluid Dynamics & Materials Processing https://doi.org/10.32604/fdmp.2024.055205

Received 20 June 2024; Accepted 09 August 2024; Published online 13 September 2024

Abstract

The large number and dense layout of rail fastening can significantly affect the aerodynamic performance of trains. Utilizing the Improved Delayed Detached Eddy Simulation (IDDES) approach based on the SST (Shear Stress Transport) k-ω turbulent model, this study evaluates the effects of the rail fastening system on the aerodynamic force, slipstream and train wake under crosswind conditions. The results indicate that in such conditions, compared to the model without rails, the rail and the fastening system reduce the drag force coefficient of the train by 1.69%, while the lateral force coefficients increase by 1.16% and 0.87%, respectively. The aerodynamic force can be considered virtually unchanged within the error allowance. However, the rail and the fastening system cause an inward shift of the negative pressure center on the leeward side of the train. The peak slipstream velocity near the ground in the rail and rail fastening system model is significantly lower than that in the situation without rails. Additionally, the rail and the fastening system not only induce two displacements in the vortex structure of the train but also accelerate the dissipation of shedding vortex and the rapid decrease of turbulent kinetic energy.

Keywords

High-speed train; rail fastening system; crosswind; aerodynamic; slipstream; wake

  • 268

    View

  • 44

    Download

  • 0

    Like

Related articles
Copyright© 2024 Tech Science Press
© 1997-2024 TSP (Henderson, USA) unless otherwise stated

Share Link