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전산해석을 통한 고속철도 더블암 팬터그래프의 부재별 공력소음특성 연구
이상아(S. A. Lee),강형민(H. M. Kang),이영빈(Y. B. Lee),김철완(C. W. Kim),김규홍(K. H. Kim) 한국전산유체공학회 2015 한국전산유체공학회지 Vol.20 No.2
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.