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中庭火灾的烟气流动与控制数值模拟是性能化消防设计的关键。借助Fluent软件,以广州某广场中庭为实例,考虑火源位置和补风口位置两因素,设计了不同的中庭类建筑火灾场景,并建立了数值模型。结果表明:当补风口稍高于火源时,不仅对火源的影响较小,还有利于烟气的排出;烟气中的CO向远距离处迁移时浓度变化较小;发生火灾时,中庭底部烟气的毒性危害高于烟气的高温危害。
Atrium fire flue gas flow and control of numerical simulation is the key to performance-based fire design. With the help of Fluent software and a square atrium in Guangzhou as an example, taking into account the location of the fire source and the location of the outlet, two kinds of atrium fires were designed and numerical models were established. The results show that when the makeup tuyere is slightly higher than the source of ignition, not only the influence on the source of ignition is small but also the flue gas is expelled; the concentration of CO in the flue gas migrates to a long distance is small; Arsenal at the bottom of the toxicity of toxic fumes higher than the high temperature flue gas hazards.