水蒸气和壁面温度对富氧状态下甲烷-空气爆燃特性的影响

Effects of Water Vapor and Wall Temperature on Methane-air Deflagration Characteristics in the State of Oxygen Enrichment

为了研究水蒸气和壁面温度对甲烷-空气爆燃特性的影响,自行搭建尺寸为π×30^(2) mm×1200 mm不锈钢爆炸管道实验平台。实验结果表明,随着壁面温度的增加,导致甲烷爆燃产生的水蒸气不易或无法在管道上形成液膜,进而抑制甲烷-空气爆燃反应。在水蒸气的时长从0 s增加到180 s的过程中,低浓度的水蒸气有促进作用,高浓度的水蒸气有抑制作用。另一方面,通过研究分析得出壁面温度和水蒸气的增加会抑制管道压力的振荡行为发生。

In order to study the effects of water vapor and wall temperature on the deflagration characteristics of methane-air,an experimental platform ofπ×302 mm×1200 mm stainless steel explosive pipe was built.The experimental results show that with the increase of wall temperature,the water vapor produced by methane deflagration is difficult or unable to form liquid film on the pipe,thus inhibiting the methane-air deflagration reaction.In the process of increasing the duration of water vapor from 0 s to 180 s,low concentration of water vapor has a promoting effect,while high concentration of water vapor has an inhibitory effect.On the other hand,through research and analysis,the increase of wall temperature and water vapor restrains the oscillation behavior of pipeline pressure.