通风状况对乳胶泡沫材料燃烧特性影响

设计小尺寸实验平台,研究不同通风管道风速对乳胶泡沫材料燃烧特性的影响。在不同风速条件下进行实验,获得材料表面温度分布、质量损失速率、火焰高度和火蔓延速率等特性参数。实验结果表明,在管道风速为0,1.5,3,4.5,6 m/s时,平均火焰蔓延速率分别为0.24,0.20,0.23,0.25,0.24 cm/s,最大质量损失速率分别为2.80,2.26,2.65,3.18,3.63 g/s。在有风条件下,随着风速的增加,火焰燃烧过程变得更加剧烈,最大质量损失率变大。实验样品的燃烧过程可以分为3个阶段:初始生长、完全燃烧和熄灭。最大火焰高度发生在燃烧过程的第2阶段,不同管道风速下的最大火焰高度分别为96.39,72.83,90.68,94.96,95.32 cm。

Effect of Wind Speed on Flame Spread Characteristics of Latex Foam

A small-scale experimental platform is designed to study the flame spread characteristics of latex foam.Experiments were carried out under different conditions of outside wind speed to obtain parameters such as surface temperature distribution,mass loss rate,flame height,and flame spread rate.The experimental results show that,the average flame spread rate is 0.24,0.20,0.23,0.25,0.24 cm/s at wind speeds of 0,1.5,3,4.5,6 m/s respectively;the maximum mass loss rate is 2.80,2.26,2.65,3.18,3.63 g/s respectively and in windy conditions,with the increase of the wind speed,the phenomenon of flame combustion becomes more obvious and the maximum mass loss rate is accelerated.The combustion process of the experimental sample shows three stages,initial growing,full development and decaying.The maximum flame height occurs in the second stage of the combustion process and the maximum flame height at different wind speeds is 96.39,72.83,90.68,94.96,95.32 cm respectively.