Case research on kitchen fire under water spray effect via numerical simulation

Abstract

Kitchen fire has been becoming the majority risk to the ancient buildings, as the insufficient firefighting device, the excessive fuel, and the lower fire resistance structure. In this paper, a numerical simulation research was carried to access the effective of water spray in the kitchen fire of ancient buildings. The heat release rate (HRR), smoke temperature and spread process has been obtained, the efficiency of general water spray and kitchen special water spray has been compared, the necessary of the fire alarm device and the water spray have also discussed. The result indicated that the HRR peak is controlled by the water spray and fire detector devices, the activity time of water spray is the majority factor. The flame temperature is approximate to 400 °C without the firefighting device. Though the fire scenario protected by kitchen water spray and fire detector, the flame temperature is 67 °C and the HRR peak is 2.52 kW, which fire has been controlled in 32.7s. The result indicated that it is necessary for the ancient building's kitchen to fix the firefighting devices, and the numerical simulation is useful for the design and selection of firefighting device.