A study of the influence of bogie cut outs' angles on the aerodynamic performance of a high-speed train
Artikel i vetenskaplig tidskrift, 2018

The aerodynamic drag of a high-speed train can contribute significantly to its energy consumption. Hence, the purpose of this paper is to find out a new compound mode of bogie cut outs to achieve drag reduction for a Chinese high-speed train. In this paper, a Detached Eddy Simulation method based on the Realizable k-ε turbulence model was used to investigate the underbody flow features of high-speed trains with different compound modes in the angles of bogie cut outs at Re = 1.85 × 10 6 . The time-averaged aerodynamic drag was compared with experimental data from wind tunnel tests. The results show that the DES simulations present high accuracy in predicting this kind of flow underneath the train body, and those numerical results closely agree with the experimental data. The variations of bogie cut outs' angles only cause the changes of flow structures around the bogies and in the wake. As a result, obtain different aerodynamic drag forces. Most of drag of the train is experienced by the streamlined head and all bogie regions. A new compound mode of bogie cut outs is proposed in the present paper, achieving 2.92% drag reduction for a three-car model.

Bogie cavity

High-speed train

Underbody flow

Detached eddy simulation

Drag reduction

Boundary layer

Författare

Jie Zhang

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Jiabin Wang

Central South University

Joint Joint International Research Laboratory of Key Technology for Rail Traffic Safety

Qianxuan Wang

Wuyi University

Xiaohui Xiong

Central South University

Joint Joint International Research Laboratory of Key Technology for Rail Traffic Safety

Guangjun Gao

Joint Joint International Research Laboratory of Key Technology for Rail Traffic Safety

Central South University

Journal of Wind Engineering and Industrial Aerodynamics

0167-6105 (ISSN)

Vol. 175 153-168

Ämneskategorier

Rymd- och flygteknik

Farkostteknik

Strömningsmekanik och akustik

DOI

10.1016/j.jweia.2018.01.041