二甲苯点火延迟时间和燃烧发射光谱测量

推进技术 ›› 2014, Vol. 35 ›› Issue (3): 392-396.

二甲苯点火延迟时间和燃烧发射光谱测量

张传钊¹,李萍¹,赵岩¹,张昌华¹,李象远²

四川大学原子与分子物理研究所,四川成都 610065;四川大学原子与分子物理研究所,四川成都 610065;四川大学原子与分子物理研究所,四川成都 610065;四川大学原子与分子物理研究所,四川成都 610065;四川大学化学工程学院,四川成都 610065

发布日期:2021-08-15
作者简介:张传钊(1987—),男,硕士,研究领域为碳氢燃料燃烧的光谱诊断。 E-mail:zcz19870517@163.com 通讯作者:李萍(1956—),女,博士,教授,博士生导师。E-mail:lpscun@163.com
基金资助:
国家自然科学基金重大研究计划项目(91016002)。

Measurements of Ignition Delay Time and Combustion Emission Spectra of Xylenes

Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China;College of Chemical Engineering, Sichuan University, Chengdu 610065, China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究二甲苯三种同分异构体的点火特性,获得该燃料燃烧反应重要自由基OH,CH和C₂的变化信息,在化学激波管中利用反射激波点火,点火温度1224~1478K,点火压力0.18~0.21MPa,燃料当量比1.0,由单色仪光谱系统测得了二甲苯/空气的点火延迟时间,并用ICCD瞬态光谱探测系统测得了点火温度1440K时对二甲苯/空气燃烧的时间分辨瞬态发射光谱。实验结果表明:对二甲苯点火延时对温度的敏感程度最高,邻二甲苯和间二甲苯的点火延时对温度的敏感程度相近；在相同实验条件下,间二甲苯和对二甲苯的点火延迟时间比较接近,邻二甲苯的点火延迟时间最短。在对二甲苯燃烧反应中,OH,CH和C₂自由基一旦出现很快达到其浓度峰值,但各个自由基的消失过程各不相同,CH和C₂自由基存在的时间很短,且相对浓度变化趋势几乎完全一致,而OH自由基持续时间最长。 

关键词: 二甲苯;自由基;点火延迟时间;瞬态发射光谱;激波管 

Abstract: In order to study the ignition characteristics of three xylene isomers and acquire time-histories of important OH,CH and C₂radicals in the combustion reaction of xylene, ignition delay times of the three xylene isomers in air were investigated behind the reflected shock waves in a chemical shock tube with a monochromator system. The ignition conditions spanned temperature of 1224~1478K and pressure of 0.18~0.21MPa with an equivalence ratio of 1.0. Time-resolved transient emission spectra of p-xylene/air in the combustion process were also obtained by using an intensified spectroscopic detector CCD system at temperature of 1440K. Experimental results illustrate that the ignition delay time of p-xylene is most sensitive to the temperature, while those of o-xylene and m-xylene are similar. The ignition delay time of m-xylene and p-xylene are close, and the time of o-xylene is the shortest at the same experimental conditions. During the p-xylene combustion reactions, the concentrations of OH, CH and C_2radicals reach their peaks once they appear, but the disappearing processes of the radicals are different. The concentration of CH radical decreases rapidly in the same trend with that of C₂ radical. Moreover, CH and C_2radicals exist in a short time while the duration of OH radical is much longer. 

Key words: Xylene; Radical; Ignition delay time; Transient emission spectrum; Shock tube

张传钊,李萍,赵岩,张昌华,李象远. 二甲苯点火延迟时间和燃烧发射光谱测量[J]. 推进技术, 2014, 35(3): 392-396.

ZHANG Chuan-zhao¹, LI Ping¹, ZHAO Yan¹, ZHANG Chang-hua¹, LI Xiang-yuan². Measurements of Ignition Delay Time and Combustion Emission Spectra of Xylenes[J]. Journal of Propulsion Technology, 2014, 35(3): 392-396.

参考文献

[1] 江晨曦,钟峰泉,范学军,等.超临界压力下航空煤油流动与传热特性试验[J].推进技术, 2010,1(2):230.(JIANG Chen-xi, ZHONG Feng-quan, FAN Xue-jun, et al.Experiment on Convective Heat Transfer of Aviation Kerosene under Supercritical Pressures[J].Journal of Propulsion Technology, 2010,1(2):230.)
[2] 范学军,俞刚.大庆RP-3航空煤油热物性分析[J].推进技术, 2006,7(2).(FAN Xue-jun, YU Gang.Analysis of Thermophysical Properties of Da qing RP-3Aviation Kerosene[J].Journal of Propulsion Technology, 2006,7(2).)
[3] Natelson R H, Kurman M S, Cernansky N P, et al.Experimental Investigation of Surrogates for Jet and Diesel Fuels[J].Fuel, 2008,7(10):2339-2342.
[4] Dooley S, Won S H, Heyne J, et al.The Experimental Evaluation of a Methodology for Surrogate Fuel Formulation to Emulate Gas Phase Combustion Kinetic Phenomena[J].Combustion and Flame, 2012,9(4).
[5] 李从善,李萍,张昌华.甲基环己烷燃烧反应特性的光谱研究[J].光谱学与光谱分析, 2011,1(9):2521-2524.
[6] 谢伟,李萍,张昌华.利用OH自由基特征发射光谱测量正庚烷的点火延迟时间[J].光谱学与光谱分析, 2011,1(2):488-491.
[7] Haylett D R, Lappas P P, Davidson D F, et al.Application of an Aerosol Shock Tube to the Measurement of Diesel Ignition Delay Times[J].Proceedings of the Combustion Institute, 2009,2(1).
[8] 陈华,杨惠星,韩德刚,等.非缝合条件激波管的化学动力学研究[J].力学学报, 1989,1(6).
[9] Battin-Leclerc F, Bounaceur R, Belmekki N, et al.Experimental and Modeling Study of the Oxidation of Xylenes[J].International Journal of Chemical Kinetics, 2006,8(4).
[10] Shen H P S, Oehlschlaeger M A.The Autoignition of C₈H₁₀Aromatics at Moderate Temperatures and Elevated Pressures[J].Combustion and Flame, 2009,6(5):1053-1058.
[11] Zhang C H, Li P, Guo J J, et al.Shock-Tube Measurements of Toluene Ignition Times and Radical Chemiluminescent Spectra at Low Pressures [J].Energy&Fuels, 2012,6(2).
[12] Goldsborough S S.A Chemical Kinetically Based Ignition Delay Correlation for Iso-octane Covering a Wide Range of Conditions Including the NTC Region[J].Combustion and Flame, 2009,6(6).
[13] Tang C L, Wei L J, Man X J, et al.High Temperature Ignition Delay Times of C₅Primary Alcohols[J].Combustion and Flame, 2013,0(3).
[14] Narayanaswamy K, Blanquart G, Pitsch H.A Consistent Chemical Mechanism for Oxidation of Substituted Aromatic Species[J].Combustion and Flame, 2010,7(10):1879-1898.
[15] 叶彬,李萍,张昌华.正庚烷燃烧反应中间自由基的光谱测量[J].光谱学与光谱分析, 2012,2(4):898-901.
[16] 王利东,李萍,张昌华.正癸烷燃烧反应中OH, CH和C₂自由基的瞬态发射光谱[J].光谱学与光谱分析, 2012,2(5):1166-1169.
[17] Gudiyella S, Malewicki T, Comandini A, et al.High Pressure Study of M-Xylene Oxidation[J].Combustion and Flame, 2011,8(4):687-704.