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喷射压力对喷雾的影响

, PP. 91-96

Keywords: 汽车工程,喷射压力,瑞利模式,雾化模式,射流碎裂长度

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Abstract:

采用闪光摄影技术,在射流试验台上进行了较低喷射压力范围内瑞利模式液膜射流碎裂过程试验,在喷雾特性试验台上进行了较高喷射压力范围内柴油雾化质量的试验,对2种试验结果进行了比较分析。结果表明由小宽厚比喷嘴喷射出的瑞利模式低速液膜射流碎裂长度随喷射流速的增大几乎呈直线增加,与喷射压力没有直接关系,喷射压力只有通过喷射流速才对射流碎裂长度产生影响,喷射流速是射流碎裂过程中的稳定因素;雾化模式的喷雾质量随喷射压力的增大显著改善,喷射压力和喷射流速转变成为液体碎裂的不稳定因素。

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