Impact Of Non-uniform Surface Flows On Fire
Suppression Of An Idealized Commodity
Author(s)
Y. Xin
Abstract
Sprinkler protection is currently the most widely used and reliable technology to
mitigate fire hazards for combustible commodities. The basic mechanism of
sprinkler protection relies on water transport on solid fuel surfaces to control and
suppress the fire. In previous studies water surface flows were characterized for
an idealized commodity consisting of corrugated cardboard boxes. The results
showed that local surface flows are highly non-uniform on commodity surfaces
even with uniform water fluxes applied directly on top of the commodity. In the
present work, an experimental study was conducted to investigate fire
suppression behaviours of the same commodity using uniform water fluxes. The
objective is to examine the impact of non-uniform water surface flows on fire
suppression behaviour. All fire tests were carried out using a rack storage
configuration. The overall fire suppression behaviour was quantified using the
chemical heat release rates measured by a 20-MW calorimeter, with the uniform
water fluxes generated by a water application apparatus. The experimental
results show that the measured heat release rates under various experimental
conditions are reasonably repeatable. Therefore, local surface flows on the
commodity, although highly non-uniform, do not have a significant impact on
the overall fire suppression behaviour. This suggests that more global or
averaged quantities related to water transport control the fire suppression, which
should be investigated in future work.
Keywords: fire suppression, surface flow, fire growth, heat release rate.
Keywords
Keywords: fire suppression, surface flow, fire growth, heat release rate.
Related Book
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