Effectiveness of critical velocity method for evacuation environment in a railroad tunnel at fire situation

The effectiveness of one dimensional critical velocity method for evacuation environment at 10MW fire size in a railroad tunnel have been investigated in this paper by three dimensional CFD method. It was performed to evaluate the evacuation environment in terms of temperature distribution, visible distance distribution and CO concentration at some tunnel inlet velocity, 1m/s, 2m/s (near critical velocity), and 3m/s. At all inlet velocity, passenger should give away downward the flow direction because the inlet velocity can not afford to sufficient evacuation environment for passengers. In case of 3m/s inlet velocity, however, the evacuation environment for passengers is better than the other cases. To provide more safe evacuation environment on fire situation, tunnel inlet velocity should be larger than critical velocity.

keywords: Critical velocity, evacuation environment, tunnel fire, 임계속도, 대피환경, 터널화재, Critical velocity, evacuation environment, tunnel fire

Reference

(1997) Detailed simulation of smoke movement due to a train fire in the context of general safety considerations for the gotthard base tunnel,

(1997) Validation of a CFD model for fires in the memorial tunnel, Proc. 9th Int. ,

(1995) Fires in transport Tunnels, Report on full-Scale Tests, Editor,

(1999) 철도터널 환기설계의 기초,

(2000) 철도터널화재시 터널내부 환경에 관한 연구, 한양대학교.

(1997) study of the effect of tunnel aspect ratio on control of smoke flow in tunnel fires, Proc. 9th Int. Symp.,

(1999) Critical Velocity-Comparative Assessment of Test Results and CFD Simulation, International Conference Tunnel Fires and Escape from Tunnels, ,

(1998) NIST GCR 98-761: Evolution of Performance-Based Codes and Fire Safety Design Methods ,

(1999) Safety Requirement and Regulations Reviews on Ventilation and Fire for Tunnels in the Hong Kong Special Administrative Region,

10.

(2000) Standard for Fixed Guideway Transit and Passenger Rail Systems,

11.

(1997) Critical Velocity Past,

12.

(1979) Interaction between Duct Fires and Ventilation Flow,

13.

(1984) Turbulence Model and Their Application in Hydraulics,

14.

(1997) New French Recommendations for Fire Ventilation in Road Tunnels, Proc. 9th Int. ,

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Article Contents

Vol.6 No.1

Effectiveness of critical velocity method for evacuation environment in a railroad tunnel at fire situation

Abstract

Reference

(사)한국터널지하공간학회