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http://dx.doi.org/10.6112/kscfe.2015.20.2.061

THE AERO-ACOUSTIC ANALYSIS FOR EACH PART OF DOUBLE ARM PANTOGRAPH OF HIGH SPEED TRAIN  

Lee, S.A. (Dept. of Mechanical & Aerospace Engineering, Seoul Nat. Univ.)
Kang, H.M. (Dept. of Mechanical Engineering, Dongyang Mirae Univ.)
Lee, Y.B. (1st R&D Institute, Agency for Defense Development)
Kim, C.W. (Aerodynamics Team, Korea Aerospace Research Institute)
Kim, K.H. (Dept. of Mechanical & Aerospace Engineering/Institute of Advanced Aerospace Technology, Seoul Nat. Univ.)
Publication Information
Journal of computational fluids engineering / v.20, no.2, 2015 , pp. 61-66 More about this Journal
Abstract
In this study, an aero-acoustic analysis around pantograph of a high speed train is performed. Computational technique and grid system is validated with wind tunnel test result and unsteady acoustic pressure data are used for analyzing noise level of each part of pantograph. FLUENT is used for flow analysis and LES(Large Eddy Simulation) is applied for analyzing turbulent flow. For acoustic analysis, Ffowcs Williams-Hawkings(FW-H) acoustics model is used and it bring the aero-acoustic characteristic of pantograph. As the result, contact strip, knee, substructure of pantograph is confirmed as a main source of aero-acoustic noise and it is dealt in various frequencies. The result is expected to help building improved grid system.
Keywords
Pantograph; Aero-Acoustics; High Speed Train;
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