氧浓度对正庚烷扩散火焰中碳烟理化特性的影响  

Effect of Oxygen Concentration on Physical and Chemical Properties of Soot in n-Heptane Diffusion Flame

作　　者：田波 李青 魏明亮[2,3] 李志丹 王宇[1] TIAN Bo;LI Qing;WEI Mingliang;LI Zhidan;WANG Yu(School of Automotive Engineering,Wuhan University of Technology,Wuhan 430070,China;Luoyang Tractor Research Institute Co.,Ltd.,Luoyang 471039,China;State Key Laboratory of Intelligent Agricultural Power Equipment,Luoyang 471039,China)

机构地区：[1]武汉理工大学汽车工程学院,武汉430070 [2]洛阳拖拉机研究所有限公司,河南洛阳471039 [3]智能农业动力装备全国重点实验室,河南洛阳471039

出　　处：《拖拉机与农用运输车》2023年第4期15-18,共4页Tractor & Farm Transporter

基　　金：智能农业动力装备全国重点实验室开放课题(SKT2022009)资助。

摘　　要：通过搭建同轴层流扩散燃烧实验台架,进行了氧浓度对正庚烷/甲苯火焰碳烟颗粒理化特性的影响研究,采用拉曼光谱仪(Raman)和热重分析仪(TGA)进行了碳烟颗粒的石墨化程度及氧化反应活性分析。结果表明:在层流反扩散火焰中,氧气浓度增加可使得碳烟颗粒生长进程加快,石墨化程度增加,反应活性降低;相同氧气浓度下,在正庚烷/甲苯中掺混10%聚甲氧基二甲醚可使碳烟颗粒石墨化程度降低,反应活性升高。In this paper,the influence of oxygen concentration on the physical and chemical properties of soot particles in n-heptane/toluene flame was studied by building a coaxial laminar diffusion combustion test bench,and the graphitization degree and oxidation reaction activity of soot particles were analyzed by using Raman spectrometer(Raman)and thermogravimetric analyzer(TGA).The results show that in laminar anti-diffusion flame,the increase of oxygen concentration can accelerate the growth process of soot particles,increase the degree of graphitization and reduce the reactivity;At the same oxygen concentration,blending 10%polymethoxydimethyl ether in n-heptane/toluene can reduce the graphitization degree of soot particles and increase the reaction activity.

关 键 词：扩散燃烧 氧浓度 碳烟颗粒 氧化活性 石墨化程度 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]