A Study on the Model Experiment for Smoke Flow in Road Tunnel Fire

Jung-Yup Kim*; Hyun-Joon Shin; Se-Gu Kang; Kyung-Chul Ahn

doi:None

All Issue

2004 Vol.6, Issue 2 Preview Page Next Page

A Study on the Model Experiment for Smoke Flow in Road Tunnel Fire 도로터널 화재발생시 연기유동에 관한 축소모형실험 연구

30 June 2004. pp. 141-149

PDF XML

Abstract

In this study, smoke movement in tunnel fire with natural and longitudinal ventilation systems has been investigated. Reduced-scale experiments were carried out under the Froude scaling using 14.55kW fire source with a wick and experimental data is obtained with 1/18 model tunnel test. Temperature profiles were measured under the ceiling and vertical direction along the center of the tunnel and poisonous gas was measured at emergency exit point. The results show that refuge time for 225m intervals of emergency exit in case of natural ventilation systems is 256 seconds and critical velocity for sufficient back-layer prevention is 2.8m/s for fire strength of 20MW.

Keywords

Tunnel fire

smoke flow

model experiment

froude scaling

도로터널내 화재가 발생한 경우 자연환기와 종류식 환기시스템에서의 연기유동에 대한 연구가 수행되었다. Froude Scaling에 기초한 1/18 축적의 축소모형실험장치가 제작되었으며, 화원으로는 연료심지를 이용한 14.55kW 규모의 연소기가 사용되었다. 화원으로부터 등비간격으로 터널천정부근과 수직방향의 온도분포가 측정되었으며, 연소가스의 농도가 피난대피구 입구에서 측정되었다. 연구결과로서 자연환기시스템에서 비상대피구가 225m 간격으로 설치되어 있을 경우 비상대피구 구간의 연기확산시간은 256초가 되며, 20MW의 화재강도에 대해 화염역류를 완전히 방지하기 위해서는 터널풍속을 2.8m/s로 형성해 주어야 한다.

키워드

터널화재

연기유동

축소모형실험

Froude 축적

References

1. Inha university, Development of Fire Strength Control with Scaling model tunnel in road tunnel, 2003.

2. Shin Hyung, Kang, A Study on Efficiency of Ventilation due to Location of Jet Fan in Tunnel, Journal of Konyang University Industrial Coope- ration, Vol. 4, pp. 87~98, 2001.

3. Shin Hyung, Kang, Analysis of Smoke Control for Longitudinal Ventilation Using Jet Fan, Journal of Konyang University Industrial Cooperation, Vol. 5, pp. 13~22, 2002.

4. Sung Chan Kim, Hong Sun Ryou, Sung Ryong Lee and Choong Ik Kim, A Study of Smoke Movement in Tunnel Fire with Natural Ventilation, Transactions of KSME B, Vol. 26, No. 7, pp. 976~982, 2002.

5. Sung Ryong Lee, Hong Sun Ryou, Choong Ik Kim, An Experimental Study of Smoke Movement in Tunnel Fires with Aspect Ratio of Tunnel Cross Section, Proceedings of the KSME 2003 Autumn Annual Meeting, pp. 115~120, 2003.

6. Won Kap Kim and Wha Taek Han, The Study on the Burned Gas Movement respect to Tunnel Grade during Fire Disaster, Proceedings of the ASHRAE 2000 Winter Meeting, pp. 12~21, 2000.

7. W. K. Chow, On Smoke Control for Tunnels by Longitudinal Ventilation, Tunneling and Under- ground Space Technology, Vol. 13, No. 3, pp. 271~275, 1998.

8. Kennedy, W. D. and Parsons, B, Critical Ve locity: Past, Present and Future, One Day Seminar of Smoke and Critical Velocity in Tunnels, 1996.

9. Thomas, P. H., The Movement of Smoke in Hor-

izontal Passage Against an Air Flow, Fire Research Station Note, No. 723, 1968.

Information

Publisher :Korean Tunneling and Underground Space Association
Publisher(Ko) :한국터널지하공간학회
Journal Title :Journal of Korean Tunnelling and Underground Space Association
Journal Title(Ko) :한국터널지하공간학회 논문집
Volume : 6
No :2
Pages :141-149

Journal of Korean Tunnelling and Underground Space Association ISSN:2233-8292(Print) 2287-4747(Online) 한국터널지하공간학회 논문집

All Issue