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[1]陈 帅,陶骏骏,王振师,等.火行为对森林地表可燃物燃烧碳转化的影响[J].燃烧科学与技术,2018,(02):177-185.[doi:10.11715/rskxjs.R201703031]
 Chen Shuai,Tao Junjun,Wang Zhenshi,et al.Effects of Fire Behavior on Carbon Conversion Rates of Surface Fire in Wildland[J].Journal of Combustion Science and Technology,2018,(02):177-185.[doi:10.11715/rskxjs.R201703031]
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火行为对森林地表可燃物燃烧碳转化的影响()
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《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

卷:
期数:
2018年02
页码:
177-185
栏目:
出版日期:
2018-04-15

文章信息/Info

Title:
Effects of Fire Behavior on Carbon Conversion Rates of Surface Fire in Wildland
文章编号:
1006-8740(2018)02-0177-09
作者:
陈 帅1陶骏骏1王振师2王海晖1李小川2
1. 中国科学技术大学火灾科学国家重点实验室,合肥 230026;2. 广东省森林培育与保护利用重点实验室,广东省林业科学研究院,广州 510520
Author(s):
Chen Shuai1Tao Junjun1Wang Zhenshi2Wang Haihui1Li Xiaochuan2
1.State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China;2.Key Laboratory of Forest Cultivation,Protection and Utilization in Guangdong Province,Forestry Academy of Guangdong Province,Guangzhou 510520,China
关键词:
地表可燃物火行为碳转化率排放比森林火灾碳排放
Keywords:
surface fuelsfire behaviorcarbon conversion rateemission ratiocarbon emission by wildfire
分类号:
TK448.21
DOI:
10.11715/rskxjs.R201703031
文献标志码:
A
摘要:
为了从理论上探索森林地表可燃物燃烧过程中碳转化率与宏观展现的火行为间内在联系,依据燃烧现象中能量平衡和元素质量守恒方程,建立起森林地表可燃物燃烧碳转化参数与其火行为参数相关联的数学模型.针对广东林区典型地表可燃物计算结果表明,随着火焰长度或火焰温度的增加,燃烧效率提高,消耗碳向CO2的转化率ηCO2增大;当火焰温度介于1,000~1,200,K 之间时,碳转化率ηCO2以及CO 对CO2排放比的变化范围分别为0.44~0.95 和0.02~0.40.进一步分析表明,火焰长度或火焰温度的提高意味着火焰区的燃烧反应更完全,消耗的碳向CO 和碳烟颗粒的转化率相对减小,导致碳转化率ηCO2增加.从本质上来说,森林地表可燃物火蔓延过程中的碳转化率实际是火行为的一种表现,由此可以解释野外试验观察到的碳排放效率的变化规律.本项工作中建立的计算模型为可靠估算实际火灾现场碳排放量奠定了基础.
Abstract:
The present work is dedicated to theoretically exploring the effects of fire behavior on carbon conversion rates by burning surface fuels in the wildland.Starting from the energy and elemental mass conservation equations operated in the combustion of wildland fuels in the open,a mathematical model was developed to correlate carbon conversion rates parameters with fire behavior parameters,including flame length and temperature.The computations were performed with the typical surface fuels in Guangdong forest areas with their known property data.It was observed that with the increase in flame length or flame temperature,the combustion efficiency increases,which results in an increase in the conversion rate of consumed carbon to CO2(ηCO2);for the surface fire with the flame temperature fluctuating between 1,000,K and 1,200,K,the conversion rate of the consumed carbon to CO2 varies between 0.44 and 0.95,whereas the emission ratio of CO to CO2 falls within the range between 0.02 and 0.40.Further analyses indicate that an increase in flame length or flame temperature implies a more complete combustion occurring in the flame zone,which causes a lower percentage of carbon emitted in the form of CO and carbon soot,and consequently leads to an increase in ηCO2.It has been confirmed that the carbon conversion rates in the fire spread over wildland fuels are in fact the reflection of their fire behavior,which well explains the variation patterns of the field experimental data reported in the literature.The mathematical model developed in this paper lays a foundation for accurately evaluating the amounts of carbon emitted in individual wildfires.

备注/Memo

备注/Memo:
收稿日期:2017-06-21. 基金项目:广东省科技创新基金资助项目(2012KJCX018-02). 作者简介:陈 帅(1988— ),男,硕士研究生,cs001@mail.ustc.edu.cn. 通讯作者:王海晖,男,博士,教授,hhwang4@ustc.edu.cn.
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