Effect of typical arch structure on slipstream and wake flow of 600 km/h maglev train
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 8 January 2024
Issue publication date: 13 August 2024
Abstract
Purpose
The aerodynamic differences between the head car (HC) and tail car (TC) of a high-speed maglev train are significant, resulting in control difficulties and safety challenges in operation. The arch structure has a significant effect on the improvement of the aerodynamic lift of the HC and TC of the maglev train. Therefore, this study aims to investigate the effect of a streamlined arch structure on the aerodynamic performance of a 600 km/h maglev train.
Design/methodology/approach
Three typical streamlined arch structures for maglev trains are selected, i.e. single-arch, double-arch and triple-arch maglev trains. The vortex structure, pressure of train surface, boundary layer, slipstream and aerodynamic forces of the maglev trains with different arch structures are compared by adopting improved delayed detached eddy simulation numerical calculation method. The effects of the arch structures on the aerodynamic performance of the maglev train are analyzed.
Findings
The dynamic topological structure of the wake flow shows that a change in arch structure can reduce the vortex size in the wake region; the vortex size with double-arch and triple-arch maglev trains is reduced by 15.9% and 23%, respectively, compared with a single-arch maglev train. The peak slipstream decreases with an increase in arch structures; double-arch and triple-arch maglev trains reduce it by 8.89% and 16.67%, respectively, compared with a single-arch maglev train. The aerodynamic force indicates that arch structures improve the lift imbalance between the HC and TC of a maglev train; double-arch and triple-arch maglev trains improve it by 22.4% and 36.8%, respectively, compared to a single-arch maglev train.
Originality/value
This study compares the effects of a streamlined arch structure on a maglev train and its surrounding flow field. The results of the study provide data support for the design and safe operation of high-speed maglev trains.
Keywords
Acknowledgements
The authors would like to acknowledge the financial support of the National Natural Science Foundation of China (Grant number 52002408, 52372369), the Project of State Key Laboratory of High-Performance Complex Manufacturing (Grant number ZZYJKT2021-09), the Natural Science Foundation of Hunan Province (Grant number 2021JJ40772) and the Postgraduate Scientific Research Innovation Project of Hunan Province (Grant number CX20200195). This work was supported in part by the High-Performance Computing Center of Central South University.
Declaration of competing interest: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Declaration of interest statement: This manuscript has not been published or presented elsewhere in part or in entirety and is not under consideration by another journal. The authors have read and understood your journal’s policies, and we believe that neither the manuscript nor the study violates any of these. There are no conflicts of interest to declare.
Corrigendum: It has come to the attention of the publisher that the article Lin, T.-T., Yang, M.-Z., Zhang, L., Wang, T.-T., Tao, Y. and Zhong, S. (2024), “Effect of typical arch structure on slipstream and wake flow of 600 km/h maglev train”, International Journal of Numerical Methods for Heat & Fluid Flow, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/HFF-10-2023-0632, displays the authors affiliations incorrectly. This error was introduced during the submission process. The following affiliations have been added for authors Tong-tong Lin, Ming-zhi Yang, Lei Zhang, Tian-tian Wang, Yu Tao and Sha Zhong: Key Laboratory of Traffic Safety on Track of Ministry of Education, Central South University, Changsha, Hunan 410075, China; Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha, Hunan 410075, China, and School of Traffic & Transportation Engineering, Central South University, Changsha, Hunan 410075, China.
The authors sincerely apologise for this error and for any misunderstanding.
Citation
Lin, T.-T., Yang, M.-Z., Zhang, L., Wang, T.-T., Tao, Y. and Zhong, S. (2024), "Effect of typical arch structure on slipstream and wake flow of 600 km/h maglev train", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 34 No. 7, pp. 2748-2765. https://doi.org/10.1108/HFF-10-2023-0632
Publisher
:Emerald Publishing Limited
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