Abstract
The metro depot area has the characteristics of large area and high storey and the smoke diffusion under fire conditions in these areas are more complicated. It is important to investigated smoke exhaust effect which is closely related to the safety of firefighters. FDS (Fire Dynamics Simulator) numerical simulation method was adopted to investigate the influence of draft curtain height on the performance of smoke exhaust fan which were installed on the inside wall of the metro depot area. The curtain heigh was set as 0.5m,1.0m,1.5m,2.0m,2.5m,3.0m respectively. The propagation of fire smoke, the concentration of CO2 at the exhaust outlet and the exhaust efficiency was analyzed. For the smoke vents set on the side wall, the height of the draft curtain would have greatly influence on the smoke exhaust efficiency. As the height of the draft curtain increases, the spread distance of smoke in the horizontal direction becomes short.it is beneficial to improve the exhaust efficiency of the fan on side wall. The research results could provide references for the fire protection design of the subway depot area.
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