@Article{fdmp.2020.07797,
AUTHOR = {Haiqing Li, Mengge Yu, Qian Zhang, Heng Wen},
TITLE = {A Numerical Study of the Aerodynamic Characteristics of a High-Speed Train under the Effect of Crosswind and Rain},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {16},
YEAR = {2020},
NUMBER = {1},
PAGES = {77--90},
URL = {http://www.techscience.com/fdmp/v16n1/38335},
ISSN = {1555-2578},
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.},
DOI = {10.32604/fdmp.2020.07797}
}