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两相流灭火系统中,气相采用不同的气体,其灭火效果不同.研究了采用空气、氮气、二氧化碳、氩气4种不同种类气体条件下,两相流细水雾灭火系统在3.6 m×4.6 m×3.9 m的空间内,灭0.1 MW及0.61 MW方油盘火的灭火特性及规律.实验过程中采用热电偶树和西门子气体分析仪对火焰温度及火场氧体积分数进行了测量,得到了不同气体种类条件下的细水雾灭火特性包括火焰最高温度、温度下降速率、氧体积分数下降速率、灭火时间等参数的变化规律和灭火过程中火场温度场和氧体积分数值的变化规律.
Two-phase flow fire extinguishing system, the gas phase using different gases, the fire extinguishing effect is different.Using air, nitrogen, carbon dioxide, argon under the conditions of four different gases, two-phase water mist fire extinguishing system 3.6 m × 4.6 fire extinguishing characteristics and regularities of 0.1 MW and 0.61 MW oil-side oil fires in the space of m × 3.9 m.The flame temperature and fire oxygen volume fraction were measured by thermocouple tree and Siemens gas analyzer in the experiment, The fire extinguishing characteristics of water mist under different gas types include the variation law of parameters such as the maximum temperature of flame, the rate of temperature drop, the rate of decrease of oxygen volume fraction, the time of extinguishing fire, and the variation law of temperature field and oxygen volume fraction during fire extinguishing.