底部通风对乳胶海绵火蔓延行为的影响

Effects of bottom ventilation condition on fire behavior over latex sponge

搭建的小尺寸实验台,包括烟气采集系统、燃烧系统与数据采集系统,以不同孔径大小的铁丝网支撑乳胶海绵样品,模拟不同的通风条件,研究底部通风条件对热厚型乳胶海绵火蔓延的影响。结果表明:铁丝网不仅阻碍了底部氧气的传输,而且使底部预热区的热量不易传播。随着铁丝对气孔遮挡面积增大,乳胶海绵样品的平均火蔓延速率、质量损失率、火焰高度、温度减小。

A small-scale experimental platform was established including flue gas acquisition system, combustion system and data acquisition system. Latex sponge samples was supported by iron wire mesh with different pore sizes to simulate the different ventilation condition, the influence of bottom ventilation conditions on the flame spread of thermally thick rubber latex sponge was studied. The results showed thatthe iron wire mesh not only hinders the transmission of oxygen at the bottom, but also makes the heat in the bottom preheating zone not to spread easily. With the increase of blowhole shielding area by iron wire, the average fire spread rate, mass loss rate, flame height and temperature of rubber latex foam decreased.