为了研究压气低压水预混细水雾抑制K类火的性能,在ISO 9705标准火灾试验内进行对比和优化试验.试验中改变水、气流量及与同流量高压水细水雾比较,获取不同条件下细水雾灭火过程的油温、焰温及灭火时间.结果表明:预混细水雾存在最佳匹配气流量,水流量的降低会增加灭火时间,水流量越小时减小同样多的水流量,灭火时间增加的跨度越大;压气低压水预混细水雾的灭火效率优于同流量的高压水细水雾.%In order to study the performance of suppressing the Class K fire by pre_mixed water mist with low pressure water, the comparative experiments were carried out in the ISO 9705 standard fire test room. In the experiment, the oil temperature, flame tem?perature and extinguishing time under different water and air flow rate were obtained, and were compared with that of the high pres?sure water mist under same flow rate. The results showed that there is a best matching gas flow of premixed spray;the decrease of the water flow will increase the extinguishing time;in case of lower flow, reducing the same amount of water flow, the extinguishing time increases more; the fire extinguishing efficiency of pre_mixed water mist with low pressure water is better than the same flow of high pressure water mist.
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