开口钢管内甲烷爆炸火焰厚度和压力发展特征

发布时间：2018-07-16 12:39

【摘要】：通过搭建长为20m、截面为0.08m×0.08m的非绝热开口钢管,研究了甲烷与空气预混气体发生爆炸后的火焰和压力发展特征。实验结果表明:火焰信号最强的时刻对应于火焰前锋反应区内某时刻,而火焰信号起始上升时刻与火焰前锋预热区起始时刻接近,应选择某点火焰信号起始上升时刻作为该点的火焰到达时间。随着远离点火源距离的增加,火焰厚度呈现先变薄后变厚的变化趋势,最大超压呈现先减小、后增大、再减小的趋势,火焰传播速度则呈先增大后减小的变化过程。非绝热开口钢管的实验条件对爆炸超压和火焰传播速度的影响较大。研究成果可为甲烷爆炸致灾机制及防控的研究提供参考。
[Abstract]:By building a non adiabatic open steel tube with a length of 20m and a cross section of 0.08m x 0.08m, the characteristics of flame and pressure development after the explosion of methane and air are studied. The experimental results show that the strongest time of the flame signal corresponds to a moment in the flame front reaction zone, and the beginning of the flame signal is in the preheating zone of the flame forward. When the beginning time is close, the flame arrival time of a point should be chosen as the time of arrival of the flame. With the increase of the distance from the fire source, the thickness of the flame appears to be thinner and then thicker, and the maximum overpressure decreases first, then increases, then decreases, and the flame propagation speed increases first and then decreases. The experimental conditions of non adiabatic open pipe have great influence on the explosion overpressure and the velocity of flame propagation. The research results can provide a reference for the study of the mechanism of methane explosion and the research of prevention and control.
【作者单位】： %E7%85%A4%E7%82%AD%E8%B5%84%E6%BA%90%E4%B8%8E%E5%AE%89%E5%85%A8%E5%BC%80%E9%87%87%E5%9B%BD%E5%AE%B6%E9%87%8D%E7%82%B9%E5%AE%9E%E9%AA%8C%E5%AE%A4;%E4%B8%AD%E5%9B%BD%E7%9F%BF%E4%B8%9A%E5%A4%A7%E5%AD%A6%E5%AE%89%E5%85%A8%E5%B7%A5%E7%A8%8B%E5%AD%A6%E9%99%A2;" target="_blank">安徽理工大学能源与安全学院;中国矿业大学<北京>煤炭资源与安全开采国家重点实验室;中国矿业大学安全工程学院;
【基金】：国家自然科学基金项目(51504008) 安徽高校自然科学研究项目(KJ2015A068) 中国博士后科学基金资助项目(2015M571913) 煤炭资源与安全开采国家重点实验室开放课题资助项目(SKLCRSM14KFB07) 安徽理工大学引进人才科研启动基金资助项目(ZY530)
【分类号】：TD712.7

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