The minimum fire extinguishing concentration is a key index for the development of next generation chemical clean fire extinguishing gases, which is usually got by the cup-burner. The fire suppression performance of low concentration of chemical gas is hard to be understood by the available methods. In this work, the fundamental acknowledgement of steady flame surface attacking mechanism by halon functional group is newly discussed by conducting a series of bench scale tests with a cylindrical channel under a varied fluorinated gases. The characteristics of flame propagation under differentiated air atmosphere environmental conditions is obtained. The influence of fluorine-containing gas flow rate on flame propagation speed is clarified. A dimensionless relationship including atomic radius, bond length, polarization degree, molar mass and molar volume are proposed to describe the influence of low concentration of fluorine-containing gas on flame propagation speed. It provides an insight for the understanding of the flame inhibition performance of low concentration halogenated gas.

中文翻译：

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研究低浓度卤化气体阻燃性能的新实验方法


最低灭火浓度是开发下一代化学清洁灭火气体的关键指标，通常通过杯式燃烧器获得。现有方法很难了解低浓度化学气体的灭火性能。在这项工作中，通过在不同氟化气体下对圆柱形通道进行一系列小规模测试，重新讨论了哈龙官能团对稳定火焰表面攻击机制的基本认识。获得了不同空气气氛环境条件下的火焰传播特性。阐明了含氟气体流量对火焰传播速度的影响。提出了包括原子半径、键长、极化度、摩尔质量和摩尔体积的无量纲关系来描述低浓度含氟气体对火焰传播速度的影响。它为了解低浓度卤化气体的阻燃性能提供了见解。