含水率对泥炭阴燃速率的影响.pdfVIP

第 22 卷 第 2 期 燃 烧 科 学 与 技 术 Vol.22 No.2 2016 年 4 月 Journal of Combustion Science and Technology Apr. 2016 DOI 10.11715/rskxjs.R201506006 含水率对泥炭阴燃速率的影响 者 香，赵伟涛，陈海翔 (中国科学技术大学火灾科学国家重点实验室，合肥 230026) 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 率为 100.02%,时泥炭不能发生阴燃． 关键词 ：泥炭；阴燃；含水率；蔓延速率 中图分类号：TQ038.2 文献标志码 ：A 文章编号 ：1006-8740 (2016)02-0136-05 Influence of Moisture Content on Spreading Rate of Peat Smoldering Zhe Xiang ，Zhao Weitao ，Chen Haixiang (State Key Laboratory of Fire Science ，University of Science and Technology of China ，Hefei 230026 ，China) Abstract ：This work experimentally investigated the influence of moisture content on the spreading rate of natural downward smoldering of peat．By measuring the inside temperature profiles of the smoldering peat ，the influence of moisture content on the peak temperature inside peat samples ，the spreading rate of front where the peak temperature was reached ，the spreading rates of moisture evaporation front at 90,℃，the peat pyrolysis front at 312, ℃ and char oxidation front at 421,℃ was analyzed．The results show that moisture content had little influence on peak tempera- tures ；the spreading rate of all the fronts decreased with the depth increase for samples wi