A Numerical Study of the Effect of Sprinkler Spray on the Flow Characteristics Induced by Fire

Abstract

The present study investigates the effects of sprinkler spray on fire driven flow characteristics in a compartment based on numerical approach. The FDS (Fire Dynamics Simulator), a widely used fire field model, was used to simulate the fire induced flow and sprinkler spray and a series of grid independence tests have been performed to obtain the optimal grid size. In order to validate the result predicted by FDS model, the calculated results were compared with experimental results of Magnone et al.. The FDS model matches quite well to experiments in temperature profile and mass flux through doorway, however, the discrepancy between the FDS model and experiments increases with increasing water discharge rate. As with previous study, the FDS calculation also shows a decrease of mass flow rate of combustion products through doorway due to the sprinkler spray. This study can contribute to optimize the sprinkler system design and verify the validity of the fire field model with sprinkler spray. Keywords

An FDS Simulation to Predict the Kerosene Pool Fire Results at Rocket Launchpad Basement Facilities in the Republic of Korea

“…Through sprinkler atomization, it can contribute to initial fire suppression and the removal of smoke within a fire space, alongside smothering effects and cooling effects. While it is necessary to understand the relationship between spray length, spray angle, and spray flow rate to implement sprinklers, the sprinkler tool incorporates these relationships as empirical constants [13][14][15]. If sprinklers are applied, different results are obtained.…”