Experimental and numerical study on the initial tip structure evolution of diesel fuel spray under various injection and ambient pressures

被引：20
作者：
Chen, Longfei [1 ]
Li, Guangze [1 ]
Huang, Dongqi [1 ]
Zhang, Zhichao [2 ,3 ]
Lu, Yiji [2 ,3 ]
Yu, Xiaoli [2 ,3 ]
Roskilly, Anthony Paul [2 ,3 ]
机构：
[1] Beihang Univ, Sch Energy & Power Engn, Beijing 100191, Peoples R China
[2] Zhejiang Univ, Dept Energy Engn, Hangzhou 310027, Zhejiang, Peoples R China
[3] Newcastle Univ, Sir Joseph Swan Ctr Energy Res, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
来源：
ENERGY | 2019年 / 186卷
基金：
中国国家自然科学基金;
关键词：
Initial breakup; Visualisation experiment; Injection pressure; Ambient pressure; Mushroom-shaped structure; TEMPORAL EVOLUTION; PRIMARY BREAKUP; BIODIESEL; STAGE; COMBUSTION; CAVITATION; FLOW; PERFORMANCE; ATOMIZATION; EMISSIONS;
D O I：
10.1016/j.energy.2019.115867
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The formation and evolution of the initial spray structure of diesel fuel in the near-nozzle region under different injection and ambient pressures were studied. A visualisation experiment study on diesel fuel using long-distance microscopy and nanosecond-pulse flashlight was performed. Four types of spray tip structure were identified and named as 'needle', 'bubble', 'mushroom' and 'umbrella'. The obtained high-resolution images revealed that both injection pressure and ambient pressure had a significant influence on the evolution of the spray tip structure. The measurement of the spray penetration and spray angle showed that the increase of injection pressure enhanced spray dispersion while the increase of ambient pressure exhibited an opposite effect. In order to provide a better understanding on the formation mechanism, a numerical study based on large eddy simulation (LES) and volume of fluid (VOF) interface capturing technique was conducted. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：9
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