Experimental Investigation of Noise Generation from the Inter-coach Spacing of a High-speed Train

고속열차의 차간 공간에서 발생하는 소음 특성의 시험적 규명

  • 최성훈 (한국철도기술연구원, 고속철도시스템연구팀) ;
  • 박춘수 (한국철도기술연구원, 고속철도시스템연구팀) ;
  • 박준홍 (한양대학교 기계공학부) ;
  • 김상수 (한국철도기술연구원, 고속철도시스템연구팀)
  • Published : 2007.12.31

Abstract

Aerodynamically generated noise is dominant when the train speed approaches 300km/h. This noise sources is caused by the turbulent flow separations or vortex shedding from the train structure. Experiments were performed to investigate the characteristics of aerodynamic noise sources generated from exterior of the KTX trains and HSR-350x, especially from the inter-coach spacing. Measurements of both the inside and outside of the cabin are carried out to investigate the characteristics of the noise. Effect of the size of the mud-flap has been investigated through an wind tunnel test and it has been found that the low frequency noise is strongly dependent on the size of the gap. Also performed is an array measurement to locate different noise sources from the high-speed train. spectral characteristics of exterior noise sources are examined.

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