摘要：为了考察影响探火管式超细粉体灭火装置有效喷射时间的关键因素,通过实验测试和数值分析,研究装置关键工程设计参数对有效喷射时间的影响,建立有效喷射时间的数值计算模型。结果表明,探火管式超细粉体灭火装置的有效喷射时间分别与充装比呈指数增长关系,与充装压力呈线性递减关系,与探火管长度呈线性递增关系,与超细粉体灭火剂粒径呈负相关关系。

关键词：探火管式灭火装置；超细粉体；灭火剂；有效喷射时间

Abstract： To investigate key factors influencing effective discharge time of superfine powder fire extinguishing equipment with fire detection tube, and to provide theoretical basis for the engineering design of such fire extinguishing equipment, influences of key engineering design parameters of superfine powder fire extinguishing equipment on effective discharge time were investigated, and numerical calculation models of effective discharge time were established through discharge tests and theoretical analysis. The results show that the effective discharge time of superfine powder fire extinguishing equipment grows exponentially with the filling ratio, decreases linearly with the filling pressure, increases linearly with the fire detection tube length, and are negatively related with particle sizes of the fire extinguishing agent. 

Keywords: extinguishing equipment with fire detection tube; superfine powder; fire extinguishing agent; effective discharge time