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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
Edited by: J. Pombo
Paper 308

Dynamic Thermal Analysis on High-Speed Railway Ventilated Brake Disc under the Effect of Air Flow

Q. Wang1 and J.Y. Zuo2

1Department of Mechanical Engineering, University of Pittsburgh, Pennsylvania, USA
2Institute of Railway & Urban Rail Transit, Tongji University, Shanghai, China

Full Bibliographic Reference for this paper
Q. Wang, J.Y. Zuo, "Dynamic Thermal Analysis on High-Speed Railway Ventilated Brake Disc under the Effect of Air Flow", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 308, 2014. doi:10.4203/ccp.104.308
Keywords: heat dissipation, ventilated brake disc, high-speed railway, geometry, pattern, intervals.

Heat dissipation characteristics of high-speed railway have a significant impact on the safety coefficient of railway braking. Using computational fluid dynamics (CFD), based on FloEFD thermal simulation software, heat dissipation of a ventilated brake disc with cylinder pillars on the 380km/h high-speed railway was studied. According to detailed simulation analyses, particularly of the distribution pattern of solid temperature and ambient fluid temperature of the brake disc, numerical simulation method has been developed to learn the heat dissipation characteristics. On this basis, analyses enabled great insight into four potential improvement areas which focus on corresponding factors with influence on heat dissipation of the brake disc like geometry, pattern and interval of the pillars. After calculation, a new design with elliptical pillars with crossing arrangement (REP-CA) has been developed and corrected eventually. The results show that the brake disc with elliptical pillars successfully decreased the maximum solid temperature, increased the thermal volume and improved their heat dissipation characteristics.

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