TY - GEN
T1 - Smoke layer formation by fires in forced-ventilation enclosure
AU - Hayashi, Yoshihiko
AU - Hasemi, Yuji
AU - Ptchelintsev, Alexander
PY - 2000
Y1 - 2000
N2 - Gas analysis and temperature measurement using a room with controllable heat sources reveal the condition of smoke layer formation in fires in forced-ventilation and highly airtight enclosures. Three combinations were used. 1) An inlet opening located in a lower part and an outlet at an upper level, 2) both an inlet and an outlet located on the ceiling, 3) An inlet at the upper level and an outlet at the lower. Methane combustion lasted for longer than 30 minutes in the first case with an air supply rate of 50m3/h and a heat release rate of l00kW. In the other configurations, combustion lasted for much less than 30 minutes, and there was hardly any smoke layer formation. The stability of the smoke layer was also affected by the inlet air velocity. The mechanism of the smoke layer destruction due to increased inlet velocity was also investigated using CFD results.
AB - Gas analysis and temperature measurement using a room with controllable heat sources reveal the condition of smoke layer formation in fires in forced-ventilation and highly airtight enclosures. Three combinations were used. 1) An inlet opening located in a lower part and an outlet at an upper level, 2) both an inlet and an outlet located on the ceiling, 3) An inlet at the upper level and an outlet at the lower. Methane combustion lasted for longer than 30 minutes in the first case with an air supply rate of 50m3/h and a heat release rate of l00kW. In the other configurations, combustion lasted for much less than 30 minutes, and there was hardly any smoke layer formation. The stability of the smoke layer was also affected by the inlet air velocity. The mechanism of the smoke layer destruction due to increased inlet velocity was also investigated using CFD results.
KW - Computational fluid dynamics
KW - Enclosure fires
KW - Forced-ventilation
KW - Smoke layer
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U2 - 10.3801/IAFSS.FSS.6-805
DO - 10.3801/IAFSS.FSS.6-805
M3 - Conference contribution
AN - SCOPUS:84555187998
SN - 0925223255
SN - 9780925223258
T3 - Fire Safety Science
SP - 805
EP - 816
BT - Fire Safety Science - Proceedings of the 6th International Symposium
PB - International Association for Fire Safety Science
T2 - 6th International Symposium on Fire Safety Science
Y2 - 5 July 1999 through 9 July 1999
ER -