碳氢燃料火焰特征光谱分析  

Flame characteristic spectroscopic analysis of hydrocarbon fuels

作　　者：李瑜 唐洪昌 孙文梅 王贤彬 唐毅 石丽芬 LI Yu;TANG Hongchang;SUN Wenmei;WANG Xianbin;TANG Yi;SHI Lifen(Officers College of PAP,Chengdu 610213,P.R.China)

机构地区：[1]武警警官学院基础部,成都610213

出　　处：《光散射学报》2025年第1期109-115,共7页The Journal of Light Scattering

摘　　要：采用ICCD探测系统和化学激波管,在压力为1.5 atm,温度为1500 K条件下,测得了正庚烷、正癸烷、二甲苯和异辛烷燃烧时从紫外到近红外的瞬态发射光谱。结果表明:燃烧过程在此波段内的主要发射光谱带归属于反应中间产物CH、OH和C_(2)自由基,确定小自由基CH、OH和C_(2)是正庚烷、正癸烷、二甲苯和异辛烷燃烧过程中重要的反应中产物,其结果与燃烧动力学机理保持一致;确定了CH、OH和C_(2)自由基特征光谱对应的电子能级跃迁;结合燃烧动力学理论从化学反应角度分析了小自由基CH、OH和C_(2)产生机制。本结果为了解碳氢燃料燃烧反应微观过程和验证其燃烧反应机理提供了实验依据。Using a heated shock tube and an spectroscopic detector ICCD,transient emission spectra of n-heptane,n-decane,xylene and isooctanein the combustion reaction weremeasured in the range of ultraviolet to near infrared.Experiments were conducted at apressure of 1.5 atm and a temperature of 1500 K.Results show that the main emission bands are attributed to CH、OHand C_(2)radicals produced during the combustion process,and the small radicals CH、OHand C_(2)are the important reaction products in the combustion process of n-heptane,n-decane,xylene and isooctane;The results are consistent with the combustion kinetics mechanism;Determined the electron level transitions corresponding to the characteristic spectra of CH、OHand C_(2)radicals.Analyzed the production mechanism of small free radicals of CH,OHand C_(2)from the perspective of chemical reaction with the theory of combustion kinetics.The results provide experimental basis for understanding the microscopic process of hydrocarbon fuels combustion reaction and verifying the mechanism of hydrocarbon fuels combustion reaction.

关 键 词：碳氢燃料 ICCD探测系统 激波管 发射光谱 反应机理 

分 类 号：O433.5[机械工程—光学工程] V312.1[理学—光学]