Study on longitudinal decay of flue gas temperature in underwater V-shaped slope tunnels

doi:10.16265/j.cnki.issn1003-3033.2019.09.011

Abstract

Abstract: In order to study temperature distribution of fire smoke in underwater V-shaped slop tunnels, firstly, smoke flow and temperature distribution characteristics in horizontal tunnels, single-slope tunnels and V-slope tunnels were compared and analyzed through theoretical analysis and numerical simulation method. Then the influence of tunnel slope shapes on flue gas movement and temperature distribution of different slope tunnels were explored. Finally, an attenuation prediction model of flue gas temperature under roof of V-slope tunnels within 1 to 8 degrees was established. The results show that temperature distribution along V-shaped slop tunnel obeys exponential function distribution, which is slower than that upstream of single-slope tunnels, faster than that downstream of single-slope tunnels, and slightly faster than that of horizontal tunnels. At the same time, the dimensionless temperature rise parameters of prediction model have an exponential relationship of 0.6 with power of fire source and a certain non-linear relationship with tunnel slops.

Key words: tunnel fire, underwater V-shaped slope, numerical simulation, smoke characteristics, temperature decay

CLC Number:

X932

JIANG Xuepeng, XIE Zhiyun, YU Siwei, LIAO Xiangjuan. Study on longitudinal decay of flue gas temperature in underwater V-shaped slope tunnels[J]. China Safety Science Journal, 2019, 29(9): 70-76.

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