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Fire Science and Engineering 2008;22(2):38-43.
Published online June 30, 2008.
화재강도변화에 따른 횡류식 대배기구 배연량 설정에 관한 연구
이동호, 김하영
1인천대학교 안전공학과2인천대학교 안전공학과 대학원
A Study on Setting Smoke Exhaust Rate According to the Transverse Ventilation with Oversized Exhaust Ports in Road Tunnel by the Variation of Fire Intensity
Rie Dong-Ho, Kim Ha-Young
요약
최근에 양방향 도로터널에서 배연효율의 증가가 요구됨에 따라 대배기에 의한 횡류식 양방향터널 배연시스템 적용이 증가되었다. 본 연구에서는 FDS Ver4.0을 사용한 수치해석을 통해 배연량과 화재강도를 변화시켜 최적배연조건을 도출하였다. 결과로, 터널 내부로 외부기류가 유입되는 경우에는 배연량을 증가시켜야 하는 것으로 나타났으며 화재지점으로 2.5m/s의 속도로 외기가 불어올 때 연기가 250m 이내로 제어되는 대배기구의 배연용량은 $244.8m^3/s$의 값으로 제어되어야 한다.
Abstract
Recently, the application of transverse ventilation system in accordance with oversized exhaust ports has been increased in bidirectional road tunnel in order to improving smoke exhaust ability. In this study, numerical simulations were carried out by using FDS (ver. 4.0) which includes variations of exhaust flow rates and heat release rate of fire to obtain the optimal smoke exhaust rate in case of fire in the transversely ventilation system. As a result, smoke exhaust amount tends to increase when the inner velocity is existing in the tunnel. In case of internal longitudinal air velocity 2.5m/s face to the fire, smoke moving distance should be restricted within 250m when the smoke exhaust rate which exceeds $244.8m^3/s$.
Key Words: Tunnel fire, Transverse smoke exhaust system, Oversized exhaust ports


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