Experimental research on breakup of 2D power law liquid film

doi:10.1016/j.cjche.2015.03.011

›› 2015, Vol. 23 ›› Issue (9): 1429-1439.DOI: 10.1016/j.cjche.2015.03.011

Experimental research on breakup of 2D power law liquid film

Lixing Xu¹, Zhenyan Xia¹, Mengzheng Zhang², Qing Du³, Fuqiang Bai³

1 Department of Mechanics, Tianjin University, Tianjin 300072, China;
2 Xi'an Aerospace Propulsion Institute, Xi'an 710100, China;
3 State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China

收稿日期:2014-09-11 修回日期:2014-12-24 出版日期:2015-09-28 发布日期:2015-10-24
通讯作者: Zhenyan Xia
基金资助:
Supported by the National Natural Science Foundation of China (11172205, 11372219, 51176137).

Experimental research on breakup of 2D power law liquid film

Lixing Xu¹, Zhenyan Xia¹, Mengzheng Zhang², Qing Du³, Fuqiang Bai³

1 Department of Mechanics, Tianjin University, Tianjin 300072, China;
2 Xi'an Aerospace Propulsion Institute, Xi'an 710100, China;
3 State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China

Received:2014-09-11 Revised:2014-12-24 Online:2015-09-28 Published:2015-10-24
Supported by:
Supported by the National Natural Science Foundation of China (11172205, 11372219, 51176137).

摘要/Abstract

摘要： On account of limited knowledge of the breakup of power law liquid film, the process of its disintegration and atomization was studied by using a planar liquid film. A linear stability analysis was adopted to predict the breakup characteristics of the power law film. The predicting formulas of stripping breakup length and diameter of ligament were put forward presently. Through high-speed photography and laser light sheet illumination, different breakup characteristics of flat power law film under different conditions were derived. The characteristic dimension of breakup regimes were defined and extracted. The effects of several parameters (injection pressure, ambient pressure, nozzle structure and fluid property) on the stripping breakup length and spray angle were investigated. The results revealed that increasing both the velocity of liquid film and the ambient pressure facilitated the breakup of film, reduced the stripping breakup length and enlarged the spray angle in different extents. The comparison between theoretical and experimental results was conducted to validate the feasibility of the linear stability theory.

关键词: Power law non-Newtonian fluid film, Liquid film disintegration, Two-phase flow, Stripping breakup length, Linear stability analysis

Abstract: On account of limited knowledge of the breakup of power law liquid film, the process of its disintegration and atomization was studied by using a planar liquid film. A linear stability analysis was adopted to predict the breakup characteristics of the power law film. The predicting formulas of stripping breakup length and diameter of ligament were put forward presently. Through high-speed photography and laser light sheet illumination, different breakup characteristics of flat power law film under different conditions were derived. The characteristic dimension of breakup regimes were defined and extracted. The effects of several parameters (injection pressure, ambient pressure, nozzle structure and fluid property) on the stripping breakup length and spray angle were investigated. The results revealed that increasing both the velocity of liquid film and the ambient pressure facilitated the breakup of film, reduced the stripping breakup length and enlarged the spray angle in different extents. The comparison between theoretical and experimental results was conducted to validate the feasibility of the linear stability theory.

Key words: Power law non-Newtonian fluid film, Liquid film disintegration, Two-phase flow, Stripping breakup length, Linear stability analysis

Lixing Xu, Zhenyan Xia, Mengzheng Zhang, Qing Du, Fuqiang Bai. Experimental research on breakup of 2D power law liquid film[J]. , 2015, 23(9): 1429-1439.

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Experimental research on breakup of 2D power law liquid film

Experimental research on breakup of 2D power law liquid film

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