Experimental Study of the Internal/external Pressure Variation of TTX Travelling through a Tunnel

한국형 틸팅차량의 터널 주행시 실내/외 압력변화에 대한 실험적 연구

  • 윤수환 (서울대학교 기계항공공학부) ;
  • 곽민호 (서울대학교 기계항공공학부) ;
  • 이동호 (서울대학교, 기계항공공학부, 항공우주신기술연구소) ;
  • 권혁빈 (한국철도기술연구원) ;
  • 고태환 (한국철도기술연구원)
  • Published : 2009.04.30

Abstract

When a train enters into a tunnel, a compression wave is generated by a front nose and a expansion wave is generated by a rear tail respectively. The interaction between pressure waves and the train makes the internal and external pressure of the train change dramatically. In this paper, we had measured the internal and external pressure variations of TTX and analyzed the pressure variations as the tunnel length. Also, the rate of internal pressure variations were investigated with the current airtight condition of TTX. In short tunnels, the internal and external pressure variation were not large because the superposition of pressure waves was not happened. In long tunnels, however, the rapid and large pressure variations were shown because of the superpositions between the same sort of pressure waves, such as expansion wave and expansion wave or compression wave and compression wave. In specific length tunnels, the pressure variation and the pressure variation rates were largely lessened because the compression wave and expansion wave were superposed.

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