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Civil-Comp Proceedings
ISSN 1759-3433 CCP: 104
PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo
Paper 11
The Influence of the Fairing Shape and Cross Winds on the Aerodynamic Characteristics of Pantograph D.L. Guo, Y. Yao, S.B. Yao and G.W. Yang
Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China D.L. Guo, Y. Yao, S.B. Yao, G.W. Yang, "The Influence of the Fairing Shape and Cross Winds on the Aerodynamic Characteristics of Pantograph", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 11, 2014. doi:10.4203/ccp.104.11
Keywords: pantograph fairing, unsteady aerodynamics, lift force fluctuation, vibration, DES.
Summary
The aerodynamic characteristics of pantograph have a great influence on the current
collection of modern electric locomotive. It's an efficient method to install a suitable
pantograph fairing to improve the pantograph aerodynamic performance. But the
cross-wind is generally regarded as a key factor to worsen the aerodynamic
characteristics of pantograph. The main objective of this paper is to investigate the
influence of pantograph fairing shape and cross-wind speeds on the unsteady
aerodynamic characteristics of pantograph by using the detached eddy simulation
method. The results show that the flow field caused by pantograph has salient
unsteady characteristics. In the cases of uninstalled fairing, the lift force fluctuation
of pantograph slider intensify with the cross wind. And the lift force fluctuation will
not be worse with the increasing of cross-wind speed. On the other hand, different
designs of pantograph fairing largely affect the pantograph flow field and the
aerodynamic forces of the pantograph slider. When the fairings are equipped in the
pantograph system, the lift force fluctuation of pantograph slider increases without
cross wind. However, both types of the fairing reduce the amplitude of lift force of
pantograph slider with cross wind. In the end, the author gives the pantograph
fairing aerodynamic optimization recommendations based on the research results.
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