考虑不同燃烧产物产率的复合功能体育馆烟气蔓延模拟分析

Simulation of Fire Smoke Flow in a Multi-Functional Gymnasium Considering Different Combustion Product Yields

采用数值模拟方法,对某复合功能体育馆不同火灾场景下可燃物不同时的烟气蔓延进行了分析,研究了烟气蔓延对可用安全疏散时间ASET的影响,同时研究了不同可燃物的烟气产率、CO产率对烟气蔓延的影响规律。研究表明:可燃物的烟气产率和CO产率分别对能见度和CO浓度的影响较大,大空间体育馆的ASET主要取决于能见度的值。消防性能化分析时针对不同可燃物类型宜采用相应的燃烧产物产率,当对火灾可燃物的燃烧特性不明确时,建议烟气产率的取值不宜小于0.09。

Numerical simulation was used to analyze the smoke flow and available safe egress time(ASET)in different fire scenarios of a multi-functional gymnasium.Meanwhile the influence of the soot yields and CO yields of different combustible materials on the smoke flow were also studied.The research shows that the soot yields and theCOyields of combustiblematerials have a great impact on the visibility and the CO concentration respectively,and the ASET in the large space gymnasium mainly depends on the value of the visibility.In the performance based fire smoke analysis,the reasonable combustion product yields should be used for different combustible materials.When the combustion characteristics of combustiblematerials are not clear,it is suggested that the value of soot yields should not be less than 0.09.