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Alternative TitleEffect of Geometry Characteristics on Internal Cavitation Flow of Injection Nozzle with Varying Hole Cross-Section
卢国权; 虞钢; 何秀丽; 郑彩云; 许永泰
Source Publication内燃机学报
Other AbstractInjection Nozzles with Varying Hole Cross-section (NVHC) accomplished by laser drilling may influence the internal flow. The phenomena of cavitation flow in two types of NVHC (elliptic-shaped and hyperbolic-shaped) were simulated using mixed multiphase flow model coupled with cavitation model. The main objective is to analyze the effect of nozzle shape with different types on the distribution of cavitation and the outlet velocity. Simulation results show that the outlet velocity of elliptic-shaped nozzles is higher than that of cylindrical-shaped nozzles, and the outlet velocity distribution gives more uniform profile. Stronger outlet cavitation intensity is found in hyperbolic-shaped nozzles, which enhances the fluctuation of outlet flow and eventually improves the fuel break-up and atomization. The study also shows that, the inner flow state in NVHC is less sensitive to the fluctuation of inlet rounded radius than that in cylindricalshaped nozzle, and this improves the uniformity of flow discharge and spray in the process of multi-holes injection.
Keyword激光打孔 变截面喷孔 空穴流动
Subject Area流体力学
Indexed ByCSCD ; EI
Funding Organization国防基础科研计划资助项目(B1320090005)
Citation statistics
Document Type期刊论文
Corresponding Author虞钢
Recommended Citation
GB/T 7714
卢国权,虞钢,何秀丽,等. 喷孔几何特征对变截面喷油孔空穴流动状态的影响[J]. 内燃机学报,2012,30(3):254-259.
APA 卢国权,虞钢,何秀丽,郑彩云,&许永泰.(2012).喷孔几何特征对变截面喷油孔空穴流动状态的影响.内燃机学报,30(3),254-259.
MLA 卢国权,et al."喷孔几何特征对变截面喷油孔空穴流动状态的影响".内燃机学报 30.3(2012):254-259.
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