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http://dx.doi.org/10.6112/kscfe.2011.16.2.017

ANALYSIS OF VORTEX SHEDDING PHENOMENA AROUND PANTOGRAPH PANHEAD FOR TRAIN USING LARGE EDDY SIMULATION  

Jang, Yong-Jun (한국철도기술연구연 철도환경연구실)
Publication Information
Journal of computational fluids engineering / v.16, no.2, 2011 , pp. 17-23 More about this Journal
Abstract
The turbulent flow and vortex shedding phenomena around pantograph panhead of high speed train were investigated and compared with available experimental data and other simulations. The pantograph head was simplified to be a square-cross-section pillar and assumed to be no interference with other bodies. The Reynolds number (Re) was 22,000. The LES(large eddy simulation) of FDS code was applied to solve the momentum equations and the Wener-Wengle wall model was employed to solve the near wall turbulent flow. Smagorinsky model($C_s$=0.2) was used as SGS(subgrid scale) model. The total grid numbers were about 9 millions and the analyzed domain was divided into 12 multi blocks which were communicated with each other by MPI. The time-averaged mainstream flows were calculated and well compared with experimental data. The phased-averaged quantities had also a good agreement with experimental data. The near-wall turbulence should be carefully treated by wall function or direct resolution to get successful application of LES methods.
Keywords
LES(Large Eddy Simulation); Vortex shedding; Wall law or Wall function; Phase average; Near-wall turbulence; Pantograph;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
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