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Two Dimensional Numerical Study in Gangway of Next Generation High Speed Train For Reduction of Aero-acoustic Noise

차세대 고속전철 차량연결부의 저소음 형상설계를 위한 차량연결부의 2차원적 수치해석 연구

  • Received : 2011.04.11
  • Accepted : 2011.05.20
  • Published : 2011.08.26

Abstract

As the preceding research for the design of gangway in the next generation high speed train, the aero-acoustic noise at the gangway is calculated. For this purpose, the shape of gangway with mud flaps is assumed as the two-dimensional cavity. Then, 5 gap sizes between mud flaps of gangway are selected and parametric study is performed according to the gap sizes. From this study, the aerodynamic features such as vortex shedding, pressure, etc. are computed. Also, the aero-acoustic properties of tonal noise and overall noise are analyzed at the 3 locations of microphone and the relation between the gap size of mud flap and the noise level is assessed. Through this study, it is shown that the noise characteristics of base and specific models are better than those of other models.

Acknowledgement

Grant : 분산형 고속철도 시스템 엔지니어링 기술개발

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