Investigation of bogie positions on the aerodynamic drag and near wake structure of a high-speed train

• Published in: Journal of wind engineering and industrial aerodynamics Vol. 185; pp. 41 - 53
• Main Authors: Gao, Guangjun, Li, Feng, He, Kan, Wang, Jiabin, Zhang, Jie, Miao, Xiujuan
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.02.2019
• Subjects: Aerodynamic performance; Bogie position; Drag reduction; High-speed train; RANS; High-speed train; Aerodynamic performance; RANS; Drag reduction; Bogie position
• ISSN: 0167-6105; 1872-8197
• DOI: 10.1016/j.jweia.2018.10.012

As train speed increases, the aerodynamic drag reduction becomes increasingly significant. The aim of this paper is to find out appropriate bogie positions to reduce the drag of a high-speed train. In this paper, based on the three-dimensional steady incompressible Reynolds-averaged N-S equations and the Realizable k-ε two-equation turbulence model, the effects of bogie positions on the aerodynamic performance and near wake of the three-carriage high-speed train are presented. The mesh resolution and methodology are validated against wind tunnel test. The results show that the front bogie position of the head car has a significant impact on the aerodynamic performance of the head car, leading to different aerodynamic drag forces. When the bogie moves towards the rear by 1 m and 2 m, the aerodynamic drag forces of the head car reduce by 7.75% and 10.56%, and the total drag decreases by 5.57% and 6.58%, respectively.