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喷嘴的性能对柴油机效率的影响非常大,喷射末期的燃油雾化质量对提高柴油机效率是至关重要的。为此英国研究人员研究了当燃油喷入温度500℃、压力500Pt/inch~2的氮气空间喷嘴关闭时和关闭后0.1ms的喷雾轮廓照片,结果表明,在喷嘴关闭后,燃油仍从喷孔继续流出,这时的雾化质量逐渐恶化。在400r/min时,喷嘴关闭后38°,有一个类似的液滴状的油团停留在喷嘴的头部。在气缸内部,由于膨胀过程温度降低,油雾蒸发量减小,燃烧时间被压缩,
The performance of the nozzle has a very large effect on the efficiency of the diesel engine. The quality of the fuel atomization at the end of the injection is of crucial importance for improving the efficiency of the diesel engine. To this end the British researchers studied the spray profile of a nitrogen space nozzle with a fuel injection temperature of 500 ° C and a pressure of 500 Pt / inch ~ 2 and a 0.1 ms post-closure spray pattern. The results showed that after the nozzle was closed, Continue to flow out, then the atomization quality is deteriorating. At 400 r / min, the nozzle closes at 38 ° and a similar droplet stays in the head of the nozzle. Inside the cylinder, due to the expansion of the lower temperature, oil mist evaporation is reduced, the combustion time is compressed,