주택화재 위험성과 Flashover 발생에 관한 연구 = The Study on the Fire Hazards of the Residential Fire and its Flashover Phenomenon

다국어 초록 (Multilingual Abstract)

The fire simulation for teh 3 story residential building was carried out to study on its fire hazards and flashover phenomenon with the FDS(ver.5.5) program developed by NIST. Design fire is that fire grows at fast growth factor(α=0.047 ㎾/s²) from 0 ㎾ to 120 ㎾ of heat release rate and fire simulation time is 600 seconds. The mixture fraction model was used to account for the evolution of the fuel gas from its surlace of fire origin through the combustion process. The results are as follows; The maximum heat release rate is 21.807 ㎾ at 132 s after fire igmition and the maximum temperature is 1,140℃ at 120 s. The smoke layer descends to 0.15 m above the floor at 403 s and the maximum visibility is 0.35 m at 125 s. The flashover of this fire model occurred at 115 s. Tenability limits of fire hazard of this fire simulation are as follows; 60℃ of temperature limit reaches at 108 s, 5 m of visibility limit is at 112s, FED is at 124 s and 1.8 m of smoke layer is at 13 s. This study shows that residents will encounter fire hazards as the order of tenability limits for smoke layer height, temperature, visibility, FED and flashover occurs about 2 minutes after fire ignition if fire grows at zero time without fire incubation. Therefore, residents should egress rapidly befor the occurrence of flashover by earlier recognizing fire.