汽油着火初期光谱特征及燃烧动力学分析  

Flame Spectral Characteristics and Analysis of Combustion Kinetics at Initial Stage of Gasoline Fire

作　　者：蒋新生 徐建楠 冯军 何标 李孝斌[3] JIANG Xin-sheng;XU Jian-nan;FENG Jun;HE Biao;LI Xiao-bin(Department of Oil,Army Logistical University,Chongqing 401331,China;73849 Troops,Tongling 244011,China;Department of Fire Engineering,The Chinese People s Armed Police Forces Academy,Langfang 065000,China)

机构地区：[1]陆军勤务学院油料系 [2]73849部队 [3]中国人民武装警察部队学院消防工程系

出　　处：《发光学报》2018年第11期1639-1645,共7页Chinese Journal of Luminescence

基　　金：国家重点研发计划(2017YFC0804705);国家自然科学基金(51574254);重庆市科技计划(CSTC 2014yykfB90001)资助项目~~

摘　　要：为实现油料火灾的及时预警,对92#汽油燃烧初期火焰光谱特征进行了实验研究,以探索基于光谱技术的火灾识别和防控。分析了火焰中具有特征谱峰的分子、自由基,说明了其生成机理,发现了火焰特征光谱的分布范围,阐述了不同波段基团光谱强弱的原因,基于基团光谱强度的变化分析了燃烧过程。结果表明,可用于燃烧初期识别的分子、自由基及其特征光谱为C2基512. 9,516. 5,547. 0 nm谱带,CH基431. 4 nm谱带,H2O分子927. 7,933. 3 nm谱带;特征光谱主要位于可见光区和近红外光区,紫外光区较少;处于链引发和传递阶段的基团不易产生积累,光谱强度相对小,处于链反应分支和中断阶段的基团能够积累,光谱强度相对大;分子、自由基的特征光谱强度会随着燃烧的进行而变化,在燃烧达到稳定期后,其独特性消失。In order to realize the timely warning of oil fires,the characteristics of flame spectra in the early stage of 92#gasoline combustion were experimentally studied to explore the identification and prevention of fire based on spectral technology.The molecular and free radicals with characteristic peaks in the flame were analyzed as well as their formation mechanism.The distribution of flame characteristic spectrum was shown,and the reasons for strong and weak spectra of different bands were explained.In addition,the combustion process was analyzed based on the change of spectral intensity of the groups.The results show that molecules and free radicals that are suitable for the recognition of gasoline fire at the initial stage of combustion are C2-512.9,547.0,516.5 nm band,CH-431.4 nm band,H2O-927.7,933.3 nm band.Spectral characteristics mainly occurred in the visible region and near-infrared region,little in near-ultraviolet region.Group is not easy to accumulate in the initiation and transfer stage of chain reaction,so the according spectral intensity is relatively small.However,some groups are able to accumulate in the chain branch and interrupt stage,thus the spectral intensity is relatively large.The characteristic spectral intensity of molecules and free radicals will change with the combustion process.When combustion reaches the stable stage,its unique characteristics disappear.

关 键 词：汽油 燃烧初期 火焰光谱 特征谱带 燃烧动力学 

分 类 号：O657.3[理学—分析化学]