A Numerical Study into the Effect of Cavitation Number on the Flow Characteristics in Diesel Nozzle Holes

被引：0
|
作者：
He Zhixia [1 ]
Liu Juyan [1 ]
Wang Qian [1 ]
Yuan Jianping [2 ]
机构：
[1] Jiangsu Univ, Sch Energy Resources & Power Engn, Zhenjiang, Peoples R China
[2] Jiangsu Univ, Res Ctr Fluid Machinery & Engn, Zhenjiang, Peoples R China
来源：
2010 ASIA-PACIFIC POWER AND ENERGY ENGINEERING CONFERENCE (APPEEC) | 2010年
基金：
中国国家自然科学基金;
关键词：
component; diesel nozzle holes; cavitation number; discharge coefficient; 3d numerical simulation;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The cavitating flow in nozzle holes is thought to be a very important factor to affect diesel fuel spray characteristics. In order to study the effect of cavitation on the internal flow of diesel nozzle, the 3d numerical simulation of cavitating flow developed fully in holes of a vertical four-hole VCO nozzle with mixture multi-phase cavitating flow model was carried out. The effects of injection pressure, needle lift, hole entrance curvature radius and hole inclination angle on the cavitating flow in nozzle holes were achieved. The investigation shows that the nozzle discharge coefficient depends mainly on cavitation number rather than on Reynolds number and the nozzle geometry heavily affects critical cavitation number, while injection pressure and needle lift has weaker effect on it.
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页数：4
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