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对蒸汽熄灭油池火进行了模拟试验研究,通过设置对比试验,研究了全淹没保护方式和局部保护方式下的不同灭火效果,分析了开放空间中蒸汽熄灭油池火的主导灭火机理。结果表明,局部保护条件下,蒸汽能快速熄灭油池火;全淹没保护条件下,利用同样的蒸汽供给强度及更小的火源,蒸汽灭火效率则相对较低。基于对比试验、灭火过程及火焰结构的分析表明,蒸汽的动力学作用为开放空间内蒸汽熄灭油池火的主导灭火机理。最后从理论基础上对蒸汽的动力学作用进行了验证和初步分析。
Through the comparison experiment, the fire extinguishing effect under full submerge protection mode and local protection mode were studied, and the leading fire extinguishing mechanism of steam extinguishing pool fire in open space was analyzed. The results show that the steam can extinguish the oil pool fire rapidly under the partial protection condition. Under the same conditions of full submergence protection, the steam emission intensity is lower with the same source of steam supply and smaller fire source. Based on the comparative tests, the analysis of the fire extinguishing process and the flame structure shows that the steam kinetic effect is the dominant fire extinguishing mechanism of the steam extinguishing the oil pool fire in the open space. Finally, the kinetic effect of steam was verified and preliminary analyzed theoretically.