TY - JOUR PY - 2012// TI - Smoke filling in closed compartments with elevated fire sources JO - Fire safety journal A1 - Zhang, Jiaqing A1 - Lu, Shouxiang A1 - Li, Qiang A1 - Yuen, Richard Kwok Kit A1 - Chen, Bing A1 - Yuan, Man A1 - Li, Changhai SP - 14 EP - 23 VL - 54 IS - N2 - An experimental study on smoke filling in closed compartments with elevated fire sources is presented. Experiments were conducted with elevated fires in a closed compartment with interior dimensions of 3.000 m (L)×3.000 m (W)×1.950 m (H). Various parameters, such as the light extinction coefficient, the oxygen concentration and the gas temperature, showed distinct stratification phenomena, and the interface of the stratification was the fuel surface level. The results indicated that the smoke layer descended to the fuel surface level but did not descend directly to the floor at the center of the compartment; rather, it continued the filling process by wall jets. A similar stratification was observed in a closed burning compartment with interior dimensions of 1.000 m (L)×1.000 m (W)×0.750 m (H) through tracking the smoke by a laser sheet. A visualization showed that the wall jets penetrated the interface, traveled along the wall, concentrated at the floor and then rose from the center of the floor. With continuous burning, the smoke filled the lower layer.

LA - SN - 0379-7112 UR - http://dx.doi.org/10.1016/j.firesaf.2012.08.003 ID - ref1 ER -