2-甲基呋喃及其与异辛烷掺混燃料燃烧特性的可视化  

Combustion Characteristic of 2-MF and Its Blend with Isooctane Using High Speed Imaging and Optical Engine

作　　者：丁海春[1,2] 江长照 马骁[3] 左承基[2] 徐宏明[1,3] 

机构地区：[1]伯明翰大学机械工程学院 [2]合肥工业大学机械与汽车工程学院,安徽合肥230009 [3]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《内燃机学报》2015年第6期491-495,共5页Transactions of Csice

摘　　要：由于2-甲基呋喃(MF)的喷雾与燃烧特点与汽油类似,其作为替代燃料的潜力受到广泛重视.利用光学发动机和高速摄影技术,结合热力学分析,对MF以及其与异辛烷掺混燃料的湍流火焰传播特性进行了研究.结果表明:与异辛烷相比,MF有更高的燃烧爆发压力和较短的滞燃期,同时其火焰面积扩展速率也高于异辛烷.研究发现火焰传播面积与已燃质量分数(MFB)的2/3次方呈线性关系.MF的湍流火焰传播速度明显大于异辛烷,二者的差别比这两种燃料层流火焰传播速度的差异更加明显.混合气的物理化学特性是影响湍流火焰传播速度的最大因素.2-methylfuran (MF) has drawn more attention because of its spray and combustion characteristics are close to that of gasoline. High speed imaging in an optical engine combining with thermodynamic analysis, the combustion characteristic of 2-MF and its blend with isooctane were studied. Compared with isooctane, 2-MF shows higher combustion pressure and shorter ignition delay. The flame area growth of 2-MF is also higher than that of isooctane and both are proportional to the 2/3, exponent of mass fraction burned (MFB). Turbulent flame propagation speed of 2-MF is higher than that of isooctane, and this difference is larger than their difference in laminar flame speed. Under same turbulent level, fuel it self is the key affecting factor on the turbulent flame speed. © 2015, Chinese Society for Internal Combustion Engines. All right reserved.

关 键 词：光学发动机 二甲基呋喃(MF) 高速摄影 湍流火焰传播速度 

分 类 号：TQ511[化学工程]