Quantitative study on the influence of bubble explosion on evaporation characteristics of flash boiling spray using UV-LAS technique

被引：33

作者：

Li, Shiyan ^{[1
]}

Zhang, Yuyin ^{[1
]}

Qi, Wenyuan ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2018年 / 98卷

基金：

中国博士后科学基金;

关键词：

Flash boiling spray; Flashing evaporation; Surface evaporation; UV visible laser absorption/scattering; Bubble explosion; BREAK-UP; SIZE; HYDROCARBONS; ATOMIZATION; CAVITATION; EMISSIONS; DROPLETS; INJECTOR; ALCOHOLS;

D O I：

10.1016/j.expthermflusci.2018.03.025

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Flash boiling is an effective way to enhance both atomization and evaporation characteristics of liquid fuel spray by introducing explosion of vapor bubbles, compared with the conventional high pressure injection. However, the evaporation characteristics and mechanism of flash boiling spray, especially, that associated with the explosion of vapor bubbles at high superheat degree, is still unknown. In this study, the vapor and liquid mass distributions in flash boiling sprays were quantified by use of ultraviolet/visible laser absorption/scattering (UV-LAS) imaging technique over a broad range of superheat degree. Based on the results of macro-structure characteristics of liquid/vapor phase spray and total evaporated vapor mass, influence of bubble explosion on detailed evaporation characteristics of flash boiling spray are investigated. And, by associating with our previous work on breakup mechanism of superheated droplet and liquid jet, the effect of two evaporation regimes, namely surface evaporation and flashing evaporation, on evaporation of flash boiling spray has been successfully identified for the first time. These results provide insightful information for understanding the evaporation mechanism of a superheated liquid jet and modeling a flash boiling spray.

引用

页码：472 / 479

页数：8

共 21 条

[1] Effect of fuel temperature on in-nozzle cavitation and spray formation of liquid hydrocarbons and alcohols from a real-size optical injector for direct-injection spark-ignition engines [J].

Aleiferis, P. G. ;

Serras-Pereira, J. ;

Augoye, A. ;

Davies, T. J. ;

Cracknell, R. F. ;

Richardson, D. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2010, 53 (21-22) :4588-4606

[2] Numerical investigation of the effect of wall wetting on hydrocarbon emissions in engines [J].

Chin, ST ;

Lee, CFF .

PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2002, 29 :767-773

[3] Three-Dimensional Integrated Guidance and Control for Near Space Interceptor Based on Robust Adaptive Backstepping Approach [J].

Gao, Changsheng ;

Jiang, Chunwang ;

Zhang, Yan ;

Jing, Wuxing .

INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING, 2016, 2016

[4] Experimental study on spray break-up and atomization processes from GDI injector using high injection pressure up to 30 MPa [J].

Lee, Sanghoon ;

Park, Sungwook .

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2014, 45 :14-22

[5]

Leipertz A, 2002, 2002012661 SAE

[6]

Li S., 2014, 92320A SPIE

[7] Quantitative observation on characteristics and breakup of single superheated droplet [J].

Li, Shiyan ;

Zhang, Yuyin ;

Qi, Wenyuan ;

Xu, Bin .

EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2017, 80 :305-312

[8] Correlation analysis of superheated liquid jet breakup to bubble formation in a transparent slit nozzle [J].

Li, Shiyan ;

Zhang, Yuyin ;

Xu, Bin .

EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2015, 68 :452-458

[9] SPECTRALLY SEPARATED FLUORESCENCE EMISSIONS FOR DIESEL FUEL DROPLETS AND VAPOR [J].

MELTON, LA .

APPLIED OPTICS, 1983, 22 (14) :2224-2226

[10]

Schmitz I., 2006, ICLASS06026

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