生物柴油/柴油混合燃料喷雾特性  

Atomization characteristics of biodiesel/diesel blend fuel

作　　者：耿莉敏[1] 曹建明[1] 王磊[1] 庄严[1] 边耀璋[1] 

机构地区：[1]长安大学汽车学院,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2009年第3期89-92,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：国家西部交通建设科技项目(200631826253)

摘　　要：为了研究生物柴油及其与柴油混合燃料的雾化质量,在燃油雾化质量评价理论的基础上,采用高分辨率数码照相机对纯柴油、纯生物柴油以及两者混合燃料的喷雾特性进行了对比研究;计算分析了喷雾锥角、喷雾油滴的尺寸数目分布、尺寸累计体积分布、平均直径、特征直径和发散边界。结果表明:随着生物柴油掺混比的增大,喷雾锥角减小,喷雾油滴的平均直径增大,油滴尺寸数目分布曲线和累计体积分布曲线向大颗粒方向偏移,发散边界减小;大颗粒油滴数目增多和油滴的发散程度缩小,说明混合燃料中生物柴油的掺混比越大,雾化质量越差。In order to study the atomization quality of biodiesel and biodiesel/diesel blend fuel, on the basis of atomization quality evaluation theory for fuel, the comparison among biodiesel/diesel blend fuel was analyzed by using high resolving power digital camera. This paper calculated the cone angle of the sprays, droplet size number distribution of the sprays, cumulative droplet size distribution based on volume, mean diameter, representative diameter and dispersion boundary. Results indicate that when biodiesel mixed ratio increases, cone angles decrease, mean diameters of the fuel droplet of the sprays increase, curves of fuel droplet size number distribution and cumulative droplet size distribution based on volume move toward larger diameters, dispersion boundary reduces. The number of large fuel droplets increases and dispersed degree reduces. It shows that the higher the biodiesel mixed ratio is, the worse the spray quality is. 5 tabs, 4 figs, 6 refs.

关 键 词：汽车工程 生物柴油/柴油混合燃料 喷雾 尺寸分布 

分 类 号：U473.12[机械工程—车辆工程]