Correlation analysis of superheated liquid jet breakup to bubble formation in a transparent slit nozzle

被引:37
作者
Li, Shiyan [1 ]
Zhang, Yuyin [1 ,2 ]
Xu, Bin [2 ]
机构
[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China
[2] Henan Univ Sci & Technol, Vehicle & Mot Power Engn Coll, Luoyang 471023, Peoples R China
基金
中国国家自然科学基金;
关键词
Superheated liquid jet; Fuel property; Transparent nozzle; Breakup; Flash boiling spray; MULTI-HOLE SPRAYS; FLASH; ATOMIZATION; DISINTEGRATION; CAVITATION;
D O I
10.1016/j.expthermflusci.2015.04.023
中图分类号
O414.1 [热力学];
学科分类号
摘要
This investigation is to evaluate and quantify the influence of bubble formation inside the nozzle on breakup characteristics of a superheated liquid jet outside the nozzle. The effect of fuel properties was examined using methanol, ethanol and butanol. A unique optically-transparent slit nozzle with a high-speed micro-imaging system were utilized for quantifying the bubble formation inside and the liquid jet breakup outside the nozzle. Correlation between bubble number density and breakup of superheated liquid jet was obtained for all the fuel. The bubble is demonstrated as the main driving forces enhancing the breakup of superheated liquid jet. By introducing a parameter K, it is easier to correlate the superheated liquid jet breakup to the bubble number density as Delta f= K.n. K is related with the superheat degree, Reynolds number, Weber number, and the ratio of liquid to ambient gas viscosities, which has different form at the transition stage (0.2 <P-a/P-s <= 0.3) and the flare flashing stage (P-a/P-s <= 0.2), implying different breakup regimes. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码:452 / 458
页数:7
相关论文
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EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2015, 63 :84-90