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首页> 外文会议>International Meeting on Chemical Sensors >Fire Gas Transport Phenomena Beneath Ceilings
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Fire Gas Transport Phenomena Beneath Ceilings

机译：天花板下的消防气体运输现象

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We report on low-power gas sensors in fire safety applications and focus on the analysis of gas propagation behavior. We measured with a variety of gas sensors their performance and the spreading behavior of gas during fire test scenarios. We observed that during slow developing smoldering fires with low convection and especially when heat layers are generated at the ceiling, gases can be detected faster than smoke. The gas diffusion through a heat layer was measured with vertical sensor chains and the result has been simulated by Fick's law. A simulation of CO and H_2 diffusion showed that diffusion is the main transport effect in the first two minutes until the turbulent buoyancies are forcing the convective flow into the heat layer.
机译：我们在消防安全应用中报告低功耗气体传感器，并专注于气体传播行为的分析。我们用各种气体传感器测量了它们的性能和消防试验期间气体的扩散行为。我们观察到，在缓慢开发闷热的闷热燃烧时，特别是当在天花板处产生热层时，可以比烟雾更快地检测到气体。通过垂直传感器链测量通过热层的气体扩散，并通过Fick的定律模拟了结果。 CO和H_2扩散的模拟表明，扩散是前两分钟的主要运输效果，直到湍流浮力迫使对流流入热层。

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