含水率对泥炭阴燃速率的影响

发布时间：2018-01-04 04:00

本文关键词：含水率对泥炭阴燃速率的影响　出处：《燃烧科学与技术》2016年02期 　论文类型：期刊论文

【摘要】：实验研究了含水率对泥炭阴燃蔓延速率的影响.通过测量燃料内部温度,分析了含水率对阴燃峰值温度、峰值温度处蔓延速率、水分蒸发前锋(T=90,℃)蔓延速率、泥炭热解前锋(T=312,℃)蔓延速率和炭氧化前锋(T=421,℃)蔓延速率的影响.结果表明:含水率对阴燃峰值温度影响不大,而在低含水率下各温度前锋阴燃速率随着深度的增加而减小,在高含水率下各温度前锋阴燃速率先增加后减小.同时,随着含水率增加,阴燃速率减小,含水率为100.02%,时泥炭不能发生阴燃.
[Abstract]:Experimental study on the effect of moisture content on the rate of spread of peat smoldering. By measuring the internal temperature of the fuel, analyzed the water content on the peak temperature of smoldering, the peak temperature of evaporation of water at the rate of spread, forward (T=90, c) the spread rate of peat pyrolysis front (T=312, c) spread rate and carbon oxidation front (T=421, c) influence spread rate. The results showed that the water content has little effect on the peak temperature of smoldering, and in low water content under the temperature of forward smoldering rate decreases with the increase of the depth in the high water content under different temperature forward smoldering rate increased first and then decreased. At the same time, with the increase of water content, smoldering rate decreased, water content 100.02%, when the peat smoldering cannot occur.

【作者单位】：中国科学技术大学火灾科学国家重点实验室;
【基金】：国家自然科学基金资助项目(51176179;51120165001)
【分类号】：TQ038.2
【正文快照】： 森林地下火是森林腐殖质或泥炭的阴燃燃烧现象.我国大兴安岭地区地下火以腐殖质阴燃为主[1],印尼[2]、俄罗斯[3]等地下火以泥炭阴燃为主.相对而言,泥炭的组成和结构比森林腐殖质更均匀,因此地下火研究中常采用泥炭作为阴燃材料.目前对泥炭阴燃的研究主要关注维持阴燃的影响因

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