环境温度对森林腐殖质阴燃特性的影响探究  

Experimental study on the effect of ambient temperature on the smoldering characteristics of forest duff

作　　者：王睿琛 杨玖玲 王皓良 胡玉琦 Wang Ruichen;Yang Jiuling;Wang Haoliang;Hu Yuqi(School of Transportation and Logistics,Southwest Jiaotong University,Chengdu Sichuan 611756,China;School of Engineering,Sichuan Normal University,Chengdu Sichuan 610101,China;Sichuan Fire Science and Technology Research Institute of MEM,Chengdu Sichuan 610036,China)

机构地区：[1]西南交通大学交通运输与物流学院,四川成都611756 [2]四川师范大学工学院,四川成都610101 [3]应急管理部四川消防研究所,四川成都610036

出　　处：《消防科学与技术》2025年第2期196-201,共6页Fire Science and Technology

基　　金：国家自然科学基金资助项目(52106184,52306158);四川省自然科学基金资助项目(2023NSFSC0189);应急管理部四川消防研究所基本科研业务费项目(Z20238801,20248811Z)。

摘　　要：本文对不同环境温度下的腐殖质阴燃特性进行研究,以期为地下火防治提供科学依据。控制阴燃环境温度分别为15、25、35℃,试验获得不同工况下腐殖质阴燃的质量损失速率、蔓延速率、CO_(2)和CO质量通量,探究环境温度对阴燃的影响。根据质量损失速率将腐殖质阴燃分为点火、增长和衰减三个阶段。35℃环境温度下腐殖质阴燃质量损失速率峰值相较15℃增长26.01%~29.63%。15℃温度下,距表面4 cm深度处的阴燃峰值温度最低,表层蔓延速度最慢,增长阶段气体排放峰值最低。15~35℃温度范围内,阴燃腐殖质的质量损失速率峰值随温度增加而上升,不同温度增长阶段平均质量损失速率无显著差异;增长阶段CO_(2)质量通量峰值随温度增加而上升,平均质量通量随温度增加而下降,不同温度增长阶段CO_(2)平均质量通量无显著差异。This paper investigates the smoldering of humus under different ambient temperatures to provide a scientific basis for mitigating smoldering forest fires.An experimental facility was used to conduct the fire ex‐periments under controlled environments with temperatures stabilizing at 15,25,35℃.The mass loss rate,spread rate and mass flux of CO and CO_(2 )were obtained and analyzed to explore the impact of ambient tempera‐ture on smoldering combustion and emissions.The experimental results showed that the smoldering of humus could be divided into three stages based on the mass loss rate:ignition,growth,and decay.Compared to 15℃,the peak mass loss rate of smoldering humus from an ambient temperature of 35℃increased by 26.01%~29.63%.At 15℃,the peak smoldering temperature within 4 cm of the surface and the surface spread rate re‐mained the slowest;the peak gas emission during the growth stage was the lowest.Within the temperature range of 15~35℃,the peak mass loss rate of smoldering humus increased with temperature,while there was no sig‐nificant difference in the average mass loss rate during the growth stage across different temperatures.The peak CO_(2) mass flux during the growth stage increased with temperature,but the average mass flux decreased with temperature,no significant difference in the average CO_(2) mass flux during the growth stage was found across different temperatures.

关 键 词：阴燃林火 环境温度 蔓延速率 阴燃排放 

分 类 号：X913.4[环境科学与工程—安全科学] S762.1[农业科学—森林保护学]