苄基叠氮复合柴油液滴燃烧特性试验研究  

Experimental Investigation on Droplet Burning Characteristics of Diesel-Benzyl Azides Blend

作　　者：韩恺[1] 杨波[1] 马小康[1] 宋国倩 赵长禄[1] 

机构地区：[1]北京理工大学机械与车辆学院车辆动力系统技术重点学科实验室,北京100081

出　　处：《工程热物理学报》2016年第10期2263-2267,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51306021)

摘　　要：本研究旨在利用飞滴法,对苄基叠氮复合柴油促进燃烧的机理进行试验研究。研究结果表明:苄基叠氮化合物和30%苄基叠氮复合柴油相比于柴油的燃烧火焰颜色更深,有更多的碳烟生成。苄基叠氮化合物液滴在燃烧中期和燃烧末期火焰附近观察到了分散的火焰,表明其液相化学反应使得液滴破裂,产生的卫星液滴脱离主液滴而继续燃烧。三种燃料液滴的归一化直径平方呈现出两阶段特性,苄基叠氮化合物的引入加速了液滴的燃烧,使得液滴燃烧速率增大。In order to investigate the mechanism of benzyl azides on accelerating the burning process of diesel-benzyl azides blend fuel,this study experimentally studied the droplet burning characteristics with free falling technique.The results show that the flame streaks of three fuels are all yellow luminous and the brilliance increase with the increase of benzyl azides fraction,indicating the increasing sooting propensity.During the middle and late period of burning,scattered flames can be observed,which indicates that there are fragments away from the droplet because of liquid phase reaction.The normalized square diameters with the normalized time of three fuels are all two-phase characteristics and the addition of benzyl azides accelerates the burning process and causes the increase of burning rates.

关 键 词：苄基叠氮 复合柴油 飞滴法 液滴燃烧 

分 类 号：TK401[动力工程及工程热物理—动力机械及工程]