
1. 华中科技大学能源与动力工程学院
2. 宁波吉利罗佑发动机零部件有限公司
Published:2026
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胡谊, 王兆文, 李晓捷, et al. 极寒低温环境下过热甲醇喷雾特性试验[J]. 2026, 44(1): 10-21.
胡谊, 王兆文, 李晓捷, et al. 极寒低温环境下过热甲醇喷雾特性试验[J]. 2026, 44(1): 10-21. DOI: 10.16236/j.cnki.nrjxb.202601002.
为全面探索极寒条件下甲醇喷雾特性,利用自主设计的低温喷雾可视化试验台架,进行了某6孔喷油器在不同环境温度下的甲醇喷雾可视化研究.通过纹影法与粒度仪分析了低温环境对甲醇喷雾宏观形态及索特平均直径(SMD)的影响规律,并探索了燃料预热技术对极寒条件下甲醇喷雾的影响.结果表明:随环境温度降低,喷雾贯穿距略有增加,锥角略有减小;相比于25℃工况,-30℃工况下喷雾SMD增大2µm.燃油温度加热至100℃时,甲醇喷雾达到闪沸,环境温度为80℃时,喷雾迅速塌陷为单束,轴向贯穿显著增强;而在环境温度降低为25℃和-30℃时,喷雾塌陷受到抑制,喷雾头部逐渐膨胀为“伞”形,贯穿距增长较为缓慢;不同环境温度下的闪沸喷雾SMD明显减小且粒径分布较窄.提出低温环境主要从阻碍喷雾塌陷、延缓涡流区出现及减少涡流区蒸发等方面影响过热甲醇喷雾的宏观形态,对燃料预热技术的应用提供了理论指导.
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