The Influence of Inclined Barriers on Airflow Over a High Speed Train under Crosswind Condition

Abstract

During the last decade the problem of crosswind has developed into an important subject amongst the topics in railway engineering. When high speed trains are exposed to extreme weather conditions such as intense lateral winds, storms and tornadoes, lateral loads acting on the train can cause overturning of the train. This present work analyzed the aerodynamic mechanism of a high-speed train with and without two inclined barriers. A three-dimensional numerical model of a train-barrier-crosswind system is adopted to investigate the effects of inclined angles of barriers on the flow patterns and the aerodynamic coefficients. This perusal surveys the design criteria indispensable for barriers that are installed alongside the tracks to protect the passing trains under strong side winds. By using a numerical code based on Lattice Boltzmann Method (LBM) it is attempted to initially investigate the behavior of airflow behind the barriers. Finally, it is found that the presence of the barriers has a great impact on decreasing the intensity of the air flow above the train. This study’s findings could be utilized as a reference for practical usage of barriers in railway transportation.

Six-dimensional force/torque sensor for aerodynamic characteristic study of high-speed train with different wind angles under stationary tornado

“…The effect of crosswind on HST is crucial for safety operation. Numerous researchers have investigated the aerodynamic characteristics of HST under crosswinds [10][11][12][13][14][15][16][17], which are influenced by conditions such as site type, wind angle, inclined barriers, windbreaks, and porous shelters. However, because tornado wind fields differ significantly from crosswind wind fields, these research results do not directly apply.…”

Interaction Simulation of a Lateral Wall Distance on Aerodynamic Characteristics of a Simplified High-speed Train

“…Moreover, the numerical results were compared with the related experimental data. From 2021 to 2023, Mohebbi and Safaee [26]; Mohebbi and Rezvani [27]; and Mohebbi et al [28,29] in a series of parallel researches, performed influences of fences on the aerodynamic behaviors of a high-speed train using the Lattice Boltzmann Method. In the following, the porous wind barriers that are widely used in this industry have been investigated and compared.…”