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Author:

Jiang, X. (Jiang, X..) | Zhang, J. (Zhang, J..) | Ding, Y. (Ding, Y..)

Indexed by:

Scopus PKU CSCD

Abstract:

Experiments were conducted with a 1:20 scale model of tunnel to analyze the effect of blockage ratio on critical wind velocity. The critical velocities under the conditions of nine blockage ratios at the fire power of 5.88 kW were tested and studied. The results showed that the critical wind velocity decreased obviously when the tunnel was blocked by vehicle and it decreased with the increase of blockage ratio, and the decreased proportion was slightly less than that of the blockage ratio. Data fitting was carried through on the measured values of the critical velocities to obtain the modified coefficient 0.548 of blockage ratio. Accordingly, the formula was proposed for calculating the critical wind velocity considering blockage ratio. The relationship between the decreased proportion of the critical wind velocity and blockage ratio was contrasted and analyzed based on the results of the tests and previous studies. It can be concluded that the main factors for the differences in the relationships between the decreased proportion of critical wind velocity and the blockage ratio are the height of fire burning surface, the location of fire source (the relative position of the fire source to blockage vehicle and whether the fire source is in or out of the blockage vehicle) and the open area of vehicle lateral wall. © 2015, Chinese Academy of Railway Sciences. All right reserved.

Keyword:

Blockage ratio; Critical wind velocity; Fire location; Model test; Tunnel fire

Author Community:

  • [ 1 ] [Jiang, X.]School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China
  • [ 2 ] [Jiang, X.]College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, 100022, China
  • [ 3 ] [Zhang, J.]School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China
  • [ 4 ] [Ding, Y.]School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan, Hubei 430081, China

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Source :

China Railway Science

ISSN: 1001-4632

Year: 2015

Issue: 4

Volume: 36

Page: 80-86

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 10

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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