Influence of gas-liquid ratio on the fire-extinguishing efficiency of compressed gas protein foam in diesel pool fire

被引：12
|
作者：
Ding, Faxing [1 ]
Kang, Wendong [1 ]
Yan, Long [1 ]
Xu, Zhisheng [1 ]
Guo, Xing [1 ]
机构：
[1] Cent South Univ, Sch Civil Engn, 22 South Shaoshan Rd, Changsha 410075, Peoples R China
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2021年 / 146卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Protein foam; Gas-liquid ratio; Fire-extinguishing process; Fire-extinguishing mechanism; FIREFIGHTING FOAMS; OIL;
D O I：
10.1007/s10973-020-10074-6
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The fire-extinguishing efficiency of compressed gas protein foam with different gas-liquid ratio on diesel pool fire was studied by a laboratory-scale fire suppression experiment. The 25% drainage time, expansion ratio and fire-extinguishing efficiency of 6% protein foams (PF) with the gas-liquid ratio in the range of 5-24 were tested. The results show that as gas-liquid ratio increases, both the 25% drainage time and expansion ratio increase. In the fire-extinguishing process, the temperature drop rate increases at the beginning and then decreases with the increase of gas-liquid ratio. When the gas-liquid ratio is 20, the foam shows the optimal equilibrium between the fluidity and stability, thus exerting the maximum temperature drop rate of 6.86 K s(-1)corresponding to the best fire-extinguishing efficiency. The main fire-extinguishing mechanism of PF in pool fire is ascribed to the combined actions of cooling effect and barrier effect. By adjusting the gas-liquid ratio in the range of 16-24, the PF can exert excellent fire-extinguishing efficiency in pool fire by diluting the combustible gases and isolating the transmission of heat and oxygen between combustion zone and fuel.
引用
收藏
页码：1465 / 1472
页数：8
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