Experimental and Numerical Study on the Suppression of Kerosene Pool Fire with Water Mist in a Standard Confined Compartment

The objective of this work is to investigate the kerosene pool fire suppression with a water mist fire suppression system. For this purpose, a series of experiments were performed in a standard enclosed compartment of 3.0m×3.0m×2.8m with the fire power fixing 195kW. The fire-extinguished time for each experiment was recorded and the repeatability of the extinguishing time at 'identical' conditions was analyzed in the present study. The smoke concentrations such as oxygen, carbon monoxide, nitrogen monoxide, nitrogen dioxide, sulfur dioxide etc, were also respectively measured on-line by the M-9000 combustion analyzer before and after the application of water mist. The results show that the extinguishing time was all below 20s and the repeatability of extinguishing time kept within 91.9%. After spraying water mist, the burn became more incomplete with the decrease of oxygen concentration and the increase of CO concentration in the compartment. Furthermore, numerical simulations were performed by using Fire Dynamics Simulator (FDS, Ver. 4.0), it shows that the temperature field and extinguishing time predicted by FDS is in accord with that by experiments.