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http://dx.doi.org/10.7782/JKSR.2015.18.4.309

A Study on the Contribution of Exterior Devices to Running Resistance in High-Speed Trains  

Oh, Hyuck Keun (Korea Railroad Research Institute)
Kwak, Minho (Korea Railroad Research Institute)
Kwon, Hyeok-bin (Department of Transportation System Engineering, Korea National University of Transportation)
Kim, Sang-soo (Korea Railroad Research Institute)
Kim, Seogwon (Korea Railroad Research Institute)
Publication Information
Journal of the Korean Society for Railway / v.18, no.4, 2015 , pp. 309-316 More about this Journal
Abstract
The contribution of exterior devices such as bogie fairings and pantographs to running resistance was estimated on the basis of coasting tests at up to 350 km/h with the help of the Korean Next Generation High speed train (HEMU-430X). In order to assess the reduction of air resistance by nose car's bogie fairing, coasting tests were conducted with a removable bogie fairing at various speed ranges. And, the contribution of the pantograph to air resistance was also estimated with coasting tests that include the pantograph's rising and descent modes. The linear regression method was used to examine decelerations from time-velocity data and the equation of resistance to motion is proposed from the deceleration data. From the aerodynamic term of the equation of resistance to motion, the contribution to air resistance by nose car's bogie fairing and pantograph was estimated. The results show that the air resistance was reduced by about 3.8% by the nose car's bogie fairing. And, the 3.9% increase of air resistance by the pantograph (open knee mode) has been found.
Keywords
High speed train; Running resistance; Coasting tests; Bogie fairing; Pantograph;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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1 B.P. Rochard, F. Schmiding (2000) A review of methods to measure and calculate train resistances, Journal of Railway and Rapid Transit, 214, pp. 185-199.   DOI
2 H.B. Kwon, H.K. Oh (2013) Decomposition and reduction of aerodynamic drag of high-speed train, Proceedings of the WCRR 2013, Sidney.
3 S.W. Kim, H.B. Kwon, Y.G. Kim, T.W. Park (2006) Calculation of resistance to motion of a high-speed train using acceleration measurements in irregular coasting conditions, Journal of Railway and Rapid Transit, 220, pp. 449-459.   DOI
4 H.B. Kwon, S.W. Kim and H.K. Oh (2014) Assessment on the Running Resistance of High-speed Train Using Coasting Test, Journal of the Korean Society for Railway, 17(3), pp. 165-170.   DOI
5 H.B. Kwon, J.S. Hong (2013) Aerodynamic drag reduction on high-performance EMU train by streamlined shape modification, Journal of the Korean Society for Railway, 16(3), pp. 169-174.   DOI   ScienceOn
6 J.S. Moon, S.W. Kim and H.B. Kwon (2014) A study on the aerodynamic drag reduction of high-speed train using bogie fairing, Journal of Computational Fluids Engineering, 19(1), pp. 41-46.   DOI
7 H.B. Kwon, Y.H. Park, D.H. Lee, M.S. Kim (2001) Wind tunnel experiments on Korean high-speed trains using various ground simulation techniques, Journal of Wind Engineering and Industrial Aerodynamics, 89, pp. 1179-1195.   DOI
8 J.L. Peters (1983) Aerodynamics of very high speed trains and maglev vehicles: state of the art and future potential, International Journal of Vehicle Design, Special publication SP3, pp. 308-341.
9 Y. Lee, J. Rho, M. Kwak, J. Lee, et al. (2010) Experimental studies on aerodynamic characteristics of various types of pantograph for high speed train, The 8th Euromech Fluid Mechanics Conference(EFMC8), Bad Reichenhall, Germany.
10 J. Rho, Y. Lee, K. Kim, D. Lee (2010) Experimental Investigations on Aerodynamic Characteristics of scaled Pantograph System with various Panhead Shape for High Speed Train, 6th IUTAM Symposium on Bluff Body Wakes and Vortex Induced Vibrations, Capri Island, Italy.
11 K.H. Kim, C.Y. Kim, H.K. Oh (2013) Aerodynamic design of lower acoustic noise/aerodynamic drag pantograph system for high speed train, Appendix pp. 33, pp. 116-117.
12 H.B. Kwon, Y.H.. Cho, K. Lee, K.N. Kim (2009) A real-scale wind tunnel testing on a pantograph for high-speed train to assess the aerodynamic characteristics, Journal of the Korean Society for Railway, 12(5), pp. 732-737.
13 T. Ko, K.N. Kim (2013) Numerical simulation for the pantograph of new-generation high-speed train, Proceedings of KSCFE Spring Conference 2013, Jeju, pp. 148-151.
14 S.H. Ryu, J.H. Hong (2011) A study on overall measurement system development of HEMU-400X, Journal of the Korean Society for Railway, 14(6), pp. 484-488.   DOI