터널 화재시 역기류의 위치 결정에 관한 실험적 연구

An Experimental Study on the Determination of Backlayering Distance in Tunnel Fires

  • 이성룡 (중앙대학교 기계공학부 대학원) ;
  • 유홍선 (중앙대학교 기계공학부)
  • 발행 : 2004.08.01

초록

본 연구에서는 터널에서 화재 발생시 역기류의 위치를 결정하기 위하여 축소실험을 실시하였다. Froude 상사를 사용하여 1/20로 축소된 모형터널에서 실험을 실시하였으며 가연물질로는 에탄올을 사용하였다. 한 변의 길이가 8-16cm의 화원을 사용하였으며 발열량은2.47-12.30㎾이다. 터널 단면의 종횡비(터널높이/터널폭)가 증가할수록 역기류를 제어하기 위해 더 큰 배연 풍속이 요구됨을 확인하였다. L$_{B}$$^{*}$ <5일 때 역기류를 막기 위한 배연속도가 0.25승에서부터 발열량에 비례하여 증가한다. L$_{B}$$^{*}$ $\geq$5에서는 발열량의 0.3승에 비례한다.

In this study reduced-scale experiments were conducted to determine the backlayering distance in tunnel fires. The 1/20 scale experiments were carried out under the Froude scaling using ethanol square pool fire ranging from 8 to 1km in each side with total heat release rate from 2.47 to 12.30 ㎾. It has been found that ventilation velocity increases with aspect ratio(tunnel height/tunnel width). At L$\_$B/$\^$*/ <5 the ventilation velocity increases proportional to the backlayering distance from 0.25 power of the heat release rate. However at L$\_$B/$\^$*/ $\geq$5 the ventilation velocity varies as the 0.3 power of the heat release rate.

키워드

참고문헌

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