NUMERICAL ANALYSIS OF POOL FIRE AND SPRINKLER INTERACTION THROUGH FDS

Abstract

Water mist based fire suppression system is one of the most recommended fire fighting method where conventional sprinkler system failed to preserve things which are subjected to fire. So its application is significant to the information and goods storage facilities. With the change in size of droplet, mechanism responsible for fire suppression shows dominancy from one to other. Fire Dynamics Simulator, provided by the National Institute of Standard and Technology (NIST), is used for solving Large Eddy Simulation (LES) based Navier-Stokes equations with an emphasis on smoke and heat transport from fire. In this present work, we have carried out the analysis of water mist droplet size variation and combination of water mist system with CO2 for the fire suppression in a compartment. FDS has been validated with the experimental results given by Kim and Ryou (2003). Methanol has been used as a fuel for combustion for the present analysis. Critical cooling time results have been reported in the present analysis for the diameter ranging between 100μm and 1000μm.