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ARTICLE
A Numerical Study of the Aerodynamic Characteristics of a High-Speed Train under the Effect of Crosswind and Rain
Haiqing Li1, Mengge Yu1, *, Qian Zhang1, Heng Wen1
1 College of Mechanical and Electronic Engineering, Qingdao University, Qingdao, 266071, China.
* Corresponding Author: Mengge Yu. Email: .
(This article belongs to this Special Issue: Train Aerodynamics)
Fluid Dynamics & Materials Processing 2020, 16(1), 77-90. https://doi.org/10.32604/fdmp.2020.07797
Received 29 June 2019; Accepted 16 August 2019; Issue published 01 February 2020
Abstract
The performances of high-speed trains in the presence of coupling effects with
crosswind and rain have attracted great attention in recent years. The objective of the
present paper was to investigate the aerodynamic characteristics of a high-speed train under
such conditions in the framework of an Eulerian-Lagrangian approach. An aerodynamic
model of a high-speed train was first set up, and the side force coefficient obtained from
numerical simulation was compared with that provided by wind tunnel experiments to
verify the accuracy of the approach. Then, the effects of the yaw angle, the resultant wind
speed, and the rainfall rate on aerodynamic coefficients were analyzed. The results indicate
that the aerodynamic coefficients grow almost linearly with the rainfall rate, and increase
with a decrease in the resultant wind speed. Due to the impact of raindrops on the train
surface and the airflow, the pressure coefficients of windward and leeward side of the train
become larger with the increase of the rainfall rate. Raindrops can accelerate the airflow
and suppress the vortices detachment. Moreover, the flow velocity in regions surrounding
the train increases with an increase in the rainfall rate.
Keywords
Cite This Article
Li, H., Yu, M., Zhang, Q., Wen, H. (2020). A Numerical Study of the Aerodynamic Characteristics of a High-Speed Train under the Effect of Crosswind and Rain.
FDMP-Fluid Dynamics & Materials Processing, 16(1), 77–90.