Prediction of Aerodynamic noise of Pantograph on a high-speed train using the Acoustic Analogy

음향근사기법을 이용한 고속철도 판토그래프의 공력소음 예측

  • 한재현 (홍익대학교, 기계공학과) ;
  • 김태민 (홍익대학교, 기계공학과) ;
  • 김정태 (홍익대학교, 기계시스템디자인공학과) ;
  • 김정수 (홍익대학교, 기계시스템디자인공학과)
  • Published : 2011.10.20

Abstract

Nowadays, high speed train has settled down as a fast and convenient environment-friendly transportation and it's need is gradually increasing. However increased train speed leads to increased aerodynamic noise, which causes critically affects comfortability of passengers. Especially, the pantograph of high speed train is protruded out of train body, which is the main factor for increased aerodynamic noise. Since aerodynamic noise caused pantograph should be measured in high speed, it is difficult to measure it and to analysis aerodynamic noise characteristics due to the various types of pantograph. In this research, aerodynamic noise of pantograph is predicted by CFD (Computational Fluid Dynamic) and FW-H (Ffowcs Williams-Hawkings) equation. Also, Wind tunnel test results and numerical simulation results were compared. As a result, Simulation results predicting sound pressure level is very similar with wind tunnel test result. This research will draw major factor in aerodynamic noise of pantograph and will be utilized for predict sound pressure level of pantograph.

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Acknowledgement

Supported by : 국토해양부