Browse > Article

An Experimental Study of Critical Velocity in Sloping Tunnel Fires  

이성룡 (중앙대학교 기계공학부)
김충익 (중앙대학교 기계공학)
유홍선 (중앙대학교 기계공학)
김혁순 (중앙대학교 기계공학)
전명배 (중앙대학교 기계공학부)
Publication Information
Fire Science and Engineering / v.18, no.1, 2004 , pp. 49-53 More about this Journal
Abstract
In this study, reduced-scale experiments were conducted to analyze an effect of tunnel slope on critical velocity. The 1/20 scale experiments were carried out under the Froude scaling using ethanol pool fire. Square pools ranging from 2.47 to 12.30㎾ were used experiments. Critical velocity varied with one-fourth power of the heat release rate. As the slope of the tunnel increases the critical velocity comes to be fast due to the increase of the chimney effect.
Keywords
Tunnel fire; Slope; Froude scaling; Critical velocity;
Citations & Related Records
연도 인용수 순위
  • Reference
1 K. Opstad, P. Aune, and J. E. Henning, 'Fire Emergency Ventilation Capacity for Road Tunnels with Considerable Slope', 9.1CAVVT, Aosta, pp.535-543(1997)
2 I. Riess, M. Bettelini, and R. Brandt, 'Smoke Extraction in Tunnels with Considerable Slope', 4th International Conference Safety in Road and Rail Tunnels, Madrid, pp.503-512(2001)
3 K. B. Edward, E. N. Harold, and D. E. David, 'Simplified Fire Growth Calculation', Fire Protection Handbook, 18th Edition, NFPA FPH1897, Section 11, Chapter 10(1997)
4 I. Riess, M. Bettelini, and R. Brandt, 'Sprint - A Design Tool for Fire Ventilation', 10.ISAVVT, Boston, pp.629-637(2000)
5 Y. Wu and M. Z. A. Bakar, 'Control of Smoke Flow in Tunnel Fires Using Longitudinal Ventilation Systems - A Study of the Critical Velocity", Fire Safety Journal, Vol. 35, p.363-390(2000)   DOI   ScienceOn
6 E. J. Weckman and A. B. Strong, 'Experimental Investigation of the Turbulence Structure of Medium- Scale Methanol Pool Fires, Combustion and Flame, Vol. 105, No.3, pp.245-266(1996)   DOI   ScienceOn
7 A. Tewarson, 'Smoke Point Height and Fire Properties of Materials', NIST-GCR-88-555, National Institute of Standards and Technology, Available from National Technical Information Services, Springfield, VA 22161, USA(1998)
8 G. T. Atkinson and Y. Wu, 'Smoke Control in Sloping Tunnels', Fire Safety Journal, Vol. 27, pp.335-341(1996)   DOI   ScienceOn
9 X. C. Zhou and J. P. Gore, 'Air Entrainment flow Field Induced by a Pool Fire', Combustion and Flame, Vol. 100, No. 1, pp.52-60(1995)   DOI   ScienceOn
10 Bundesamt fur Strassen : Richtlinie Systemwahl, 'Dimensionierung und Betrieb von Tunnelluftungsanlagen', Dragt V5.0(2000)
11 D. Drysdale, 'An Introduction to Fire Dynamics', A Wiley-Interscience Publication(1985)
12 V. Babrauskas, 'Burning Rates', The SFPE Handbook of Fire Protection Engineering, 2-1 to 2-15, USA(1998)