Experimental study of the effectiveness of a water system in blocking fire-induced smoke and heat in reduced-scale tunnel tests

Abstract

A water system, consisting of several water mist nozzles, has been installed in a reduced-scale tunnel.Its effectiveness in blocking fire-induced smoke and heat is tested, with and without longitudinal

Interpretation of flow fields induced by water spray systems in reduced-scale tunnel fire experiments by means of CFD simulations

“…In (Sun et al, 2016), a series of experiments has been discussed, illustrating the effect of mechanical longitudinal ventilation and water sprays on fire-induced smoke motion in a reduced-scale tunnel. The context of those experiments was to test the effectiveness of water systems in blocking the fire-induced smoke and heat, under different ventilation and water spray conditions.…”

“…To that purpose, a water system consisting of several water nozzles was put in place. Different combinations of numbers of nozzles, water flow rates and positions of nozzles were discussed in (Sun et al, 2016).. The detailed information of the experimental setup was provided in (Sun et al, 2016).Some of important aspects are briefly repeated here.…”

“…Different combinations of numbers of nozzles, water flow rates and positions of nozzles were discussed in (Sun et al, 2016).. The detailed information of the experimental setup was provided in (Sun et al, 2016).Some of important aspects are briefly repeated here. The tunnel was made of fire-proof glass and iron plate, with thermo-physical properties as presented in section 2.…”

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Computational Fluid Dynamics (CFD) simulation results, obtained with FDS 6.0.1 (McGrattan et al, 2013), are presented of reduced-scale tunnel fire tests. In (Sun et al, 2016), an extensive data set has been discussed in terms of temperature measurements in a reduced-scale tunnel, involving longitudinal ventilation and a variety of water supply through nozzles, in the context of potential smoke blockage. In (Sun et al, 2016), 10 different scenarios have been discussed, for different numbers of nozzles and different nozzle configurations.

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“…In (Sun et al, 2016), an extensive data set has been discussed in terms of temperature measurements in a reduced-scale tunnel, involving longitudinal ventilation and a variety of water supply through nozzles, in the context of potential smoke blockage. In (Sun et al, 2016), 10 different scenarios have been discussed, for different numbers of nozzles and different nozzle configurations. Given the limitation of the experimental instrumentation, as a series of thermocouple trees, a full interpretation of the flow field was impossible.…”