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Open Access

ARTICLE

Aerodynamic Analysis and Optimization of Pantograph Streamline Fairing for High-Speed Trains

Xiang Kan1, Yan Li2, Tian Li1,*, Jiye Zhang1
1 State Key Laboratory of Rail Transit Vehicle System, Southwest Jiaotong University, Chengdu, 610031, China
2 Technical Center, Southwest Jiaotong University Chengdu Design Institute Co., Ltd., Chengdu, 610031, China
* Corresponding Author: Tian Li. Email: litian2008@home.swjtu.edu.cn

Fluid Dynamics & Materials Processing https://doi.org/10.32604/fdmp.2023.044050

Received 19 July 2023; Accepted 25 September 2023; Published online 23 November 2023

Abstract

A pantograph serves as a vital device for the collection of electricity in trains. However, its aerodynamic resistance can limit the train’s running speed. As installing fairings around the pantograph is known to effectively reduce the resistance, in this study, different fairing lengths are considered and the related aerodynamic performances of pantograph are assessed. In particular, this is accomplished through numerical simulations based on the k-ω Shear Stress Transport (SST) two-equation turbulence model. The results indicate that the fairing diminishes the direct impact of high-speed airflow on the pantograph, thereby reducing its aerodynamic resistance. However, it also induces interferences in the flow field around the train, leading to variations in the aerodynamic resistance and lift of train components. It is shown that a maximum reduction of 56.52% in pantograph aerodynamic resistance and a peak decrease of 3.38% in total train aerodynamic resistance can be achieved.

Keywords

Pantograph; fairing; train aerodynamic; numerical simulation

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