Critical superheat for flashing of superheated liquid jets
Critical superheat for flashing of superheated liquid jets
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DOI：
10.1021/i100022a005
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发表时间：
1986-05
期刊：
影响因子：
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通讯作者：
Y. Kitamura;H. Morimitsu;Teruo Takahashi
中科院分区：
文献类型：
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作者：
Y. Kitamura;H. Morimitsu;Teruo Takahashi
通过长喷嘴将水和乙醇喷射到真空室内，对过热液体射流的闪蒸现象进行了实验研究。过热液体被观察到以两种不同的模式喷射：完全闪蒸和两相汽液流出物。完全闪蒸发生在远高于对应于腔室中的压力的液体的泡点的温度下;由于喷嘴中的气泡形成而喷雾的两相流出物发生在更接近泡点的温度下。当喷嘴较短时，可能出现两相流出。临界温度以上的完全闪蒸发生相关的经验公式的基础上，在过热液体中的气泡生长速率，测量的高速运动图片。
Experiments were carried out to study the flashing of superheated liquid jets by the ejection of water and ethanol into a vacuum chamber through long nozzles. Superheated liquids were observed to spray in two different patterns: complete flashing and a two-phase vapor-liquid effluent. Complete flashing occurs at a temperature far above the liquid's bubble point corresponding to the pressure in the chamber; the two-phase effluent, spraying due to the bubble formation in the nozzle, occurs at temperatures closer to the bubble point. The two-phase effluent is likely to occur when the nozzle is shorter. The critical superheat above which the complete flashing occurs is correlated by an empirical equation on the basis of bubble growth rate in superheated liquids, measured by a high-speed motion picture.