乙醇柴油混合燃料碳烟特性可视化研究  

INVESTIGATION ON THE SOOT CHARACTER OF ETHANOL-DIESEL BLENDED FUELS BY VISUALIZATION METHOD

作　　者：何旭[1] 马骁[1] 齐运亮[2] 王建昕[1] 

机构地区：[1]清华大学汽车安全与节能国家重点实验室,北京100084 [2]山东建筑大学机电工程学院,山东济南250101

出　　处：《工程热物理学报》2010年第12期2141-2144,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.50806039)

摘　　要：在一台电控共轨光学发动机上,采用高速摄影法,对不同掺混比例的乙醇柴油混合燃料进行研究,获取了缸内燃烧火焰图像,通过双色法得到表征碳烟总体分布的KL因子,分析了乙醇这种含氧生物质燃料对缸内燃烧过程和碳烟生成特性的影响。研究结果表明,随着乙醇掺入比例的增加,滞燃期相对延长,燃烧持续期缩短,火焰的亮度和分布面积都随之下降。KL因子的最高浓度降低,碳烟浓区的分布区域减小,碳烟的氧化进程加快。In an electronic control optical engine with common rail, investigation on the ethanol-diesel blended fuels were implemented by high-speed direct photography and flame images were acquired. Based on the two-color method, KL factor which indicated the integrated soot concentration in the cylinder was obtained from the flame image to analyze the effect of the blended fuels on the combustion and soot formation in the cylinder. The results show that with more ethanol blended in the fuel, the ignition delay increases and combustion duration decreases. The luminosity and distribution of the flame are reduced also. The maximum KL factor is also reduced as well as rich soot concentration distribution area, and the process of soot oxidation is speeded.

关 键 词：乙醇柴油 双色法 可视化 碳烟 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]