Quantitative observation on breakup of superheated liquid jet using transparent slit nozzle
Quantitative observation on breakup of superheated liquid jet using transparent slit nozzle
复制标题
透明狭缝喷嘴对过热液体射流破碎的定量观察
DOI：
10.1016/j.expthermflusci.2015.01.004
复制
发表时间：
2015-05
影响因子：
3.2
通讯作者：
Bi
中科院分区：
文献类型：
--
作者：
Yuyin Zhang;Shiyan Li;Bin Zheng;Jian Wu;Bi
与传统的高压喷射相比，闪沸腾雾化是增强SIDI发动机中燃油射流破碎和蒸发并提高燃油喷雾质量的有效方法，特别是在冷启动条件下。然而，喷嘴内部发生了什么以及它如何影响过热液体射流（喷雾）的破碎和雾化特性仍然未知。在这项研究中，开发了一种二维透明喷嘴，用于通过高速显微成像定量观察喷嘴内部气泡的形成和喷嘴出口附近的液体射流破裂。研究发现，液体射流破碎特性受到喷嘴内气泡的数量密度和尺寸分布的强烈影响。过热度对射流破碎和气泡形成的特性均具有显着影响。 30°C的过热度是过热射流气泡形成速率和雾化特性发生显着变化的临界点。这些结果为理解过热液体射流的破碎机制和模拟闪蒸喷雾提供了富有洞察力的信息。
Flash-boiling atomization is an effective way to enhance fuel jet breakup and evaporation and to improve the quality of fuel spray in an SIDI engine especially at the cold start condition, compared to the conventional high pressure injection. However, what happened inside the nozzle and how it affects the breakup and atomization characteristics of a superheated liquid jet (spray) is still unknown. In this study, a two-dimensional transparent nozzle was developed for quantitatively observing the bubble formation inside the nozzle and liquid jet breakup near the nozzle exit by high-speed microscopic imaging. It was found that the liquid jet breakup characteristics is strongly affected by the number density and size distribution of bubbles inside nozzle. The superheat degree has predominant effect on both characteristics of the jet breakup and the bubble formation. Superheat degree of 30 °C is a critical point at which the bubble formation rate and the atomization characteristics of the superheated jet changes significantly. These results provide insightful information for understanding the breakup mechanism of a superheated liquid jet and modeling a flash boiling spray.
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影响因子：
7.4
作者：
Serras-Pereira, J.;Aleiferis, P. G.;Richardson, D.
通讯作者：
Richardson, D.
DOI：
10.4271/2002-01-2661
发表时间：
2002-10
期刊：
--
影响因子：
--
作者：
I. Schmitz;W. Ipp;A. Leipertz
通讯作者：
I. Schmitz;W. Ipp;A. Leipertz
影响因子：
2
作者：
R. D. Oza
通讯作者：
R. D. Oza
影响因子：
1.2
作者：
B. S. Park;Sang Yong Lee
通讯作者：
B. S. Park;Sang Yong Lee
DOI：
10.1016/0140-6701(96)88455-4
发表时间：
1996-05
期刊：
Fuel and Energy Abstracts
影响因子：
--
作者：
V. A. Zvonov
通讯作者：
V. A. Zvonov