中文摘要：

利用高速摄影技术，在定容燃烧弹中进行了高喷射压力条件下的生物柴油与柴油喷雾特性试验，对比了两种燃料的喷雾形态、贯穿距离、喷雾锥角，然后利用仿真计算研究了背景压力、喷射压力、背景温度对生物柴油贯穿距离的影响规律。研究结果表明：背景压力增加，生物柴油贯穿距离减小；喷射压力升高，生物柴油贯穿距离增大；背景温度增加，生物柴油贯穿距离先增大后减小，呈现不规律的波动，生物柴油的蒸发速率较大是造成这种现象的原因。

英文摘要：

The spray characteristics of biodiesel and diesel were studied in a constant volume combustion bomb by using high speed photography under high injection pressure. The effects of background pressure, background temperature, and injection pressure on the spray characteristics were studied by means of CFD code. The results indicated that the penetration of biodiesel decreased with the increase of backpressure ; penetration of biodiesel increased with the increase of injection pressure ; with the increase of background temperature, penetration of biodiesel began to fluctuate due to the high evaporation rate.