Experimental study on the effect of vortex cavitation in scaled-up diesel injector nozzles and spray characteristics

被引：28

作者：

Cao, Tianyi ^{[1
]}

He, Zhixia ^{[2
]}

Zhou, Han ^{[1
]}

Guan, Wei ^{[1
]}

Zhang, Liang ^{[1
]}

Wang, Qian ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Jiangsu Univ, Inst Energy Res, Zhenjiang 212013, Jiangsu, Peoples R China

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2020年 / 113卷

基金：

中国国家自然科学基金;

关键词：

Transparent nozzle; Vortex cavitation; Pressure fluctuations; Entry fillet; Spray atomization; LARGE-EDDY SIMULATION; MULTI-HOLE NOZZLES; FLOW; ORIFICE; COMBUSTION; GEOMETRY; INLET; PREDICTION; INCEPTION; MODEL;

D O I：

10.1016/j.expthermflusci.2019.110016

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The working stability, service life of the injector, spray atomization and its subsequent mixture combustion are subject to significant influence from the cavitating flow in diesel nozzles. In this paper, the vortex cavitation characteristics in diesel nozzles and its effects on spray characteristics were investigated by performing visualization experiments in scaled-up optical nozzles. A pressure fluctuation test system was constructed for the effect of vortex cavitation occurring in holes on pressure fluctuations. It was concluded that vortex cavitation is one of the most significant influencing factors in pressure fluctuations for the injection system. Furthermore, the inception and the development of vortex cavitation were discussed in detail.

引用

页数：10

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