中文摘要：

在高温高压定容燃烧弹上，采用高速摄影法对不同掺混比例的生物柴油混合燃料进行研究，获取了喷雾、着火和燃烧火焰图像，分析了生物柴油这种含氧生物燃料对喷雾和燃烧过程的影响。研究结果表明：随着生物柴油掺混比例的增加，喷雾锥角减小；生物柴油的贯穿距离在喷雾初期比普通柴油长，但在喷雾中、后期基本一致；生物柴油与柴油相比，其滞燃期缩短，着火点数量增多；随着生物柴油在燃料中比例的增加，燃烧火焰的亮度和分布面积都随之下降。

英文摘要：

In a constant-volume combustion bomb at high temperature and pressure, the images of spray, ignition and combustion of various diesel/biodiesel blended fuels with different fraction were achieved by high-speed direct photography. Based on the images acquired, the effect of biodiesel addition on spray and combustion characteristics was analyzed. Results show that with increasing biodiesel blended in diesel fuel, spray cone angle decreases, and penetration of spray becomes greater than that of diesel fuel in the early stage but almost the same in the following stage. Compared with diesel fuel, ignition delay of biodiesel blends decreases and number of ignition position increases. The flame luminosity and distribution area decrease with biodiesel addition increasing.