Effects of the Internal Flow in a Nozzle Hole on the Breakup Processes of a Liquid Jet

1997 ◽  
Vol 24 (4-6) ◽  
pp. 461-470 ◽  
Author(s):  
N. Tamaki ◽  
Keiya Nishida ◽  
Hiroyuki Hiroyasu ◽  
M. Shimizu
Keyword(s):  
Internal Flow ◽  
Liquid Jet ◽  
Nozzle Hole

ENHANCEMENT OF THE ATOMIZATION OF A LIQUID JET BY CAVITATION IN A NOZZLE HOLE

2001 ◽  
Vol 11 (2) ◽  
pp. 14 ◽  
Author(s):  
N. Tamaki ◽  
M. Shimizu ◽  
Hiroyuki Hiroyasu
Keyword(s):  
Liquid Jet ◽  
Nozzle Hole

scholarly journals The Effect of Cavitation in a Nozzle Hole on the Atomization of a Liquid Jet.

1997 ◽  
Vol 63 (614) ◽  
pp. 3447-3454 ◽  
Author(s):  
Nobushige TAMAKI ◽  
Keiya NISHIDA ◽  
Masanori SHIMIZU ◽  
Hiroyuki HIROYASU
Keyword(s):  
Liquid Jet ◽  
Nozzle Hole

Study on Influence of Nozzle Structure on Flow in Diesel Nozzle Orifice

2012 ◽  
Vol 246-247 ◽  
pp. 127-130
Author(s):  
Bing Li ◽  
Xue Song Hu ◽  
Xiao Feng Cao ◽  
Gui Qi Jia ◽  
Fang Xi Xie ◽  
...  
Keyword(s):  
Flow Characteristics ◽  
Internal Flow ◽  
Key Factors ◽  
Complex Flow ◽  
Two Phase ◽  
Nozzle Orifice ◽  
Fuel Flow ◽  
Flow Features ◽  
Diesel Nozzle ◽  
Nozzle Hole

The fuel flow characteristics in diesel nozzle orifice are key factors to the atomization of fuel near the nozzle orifice. In the paper, two-phase flow model is used to simulate the complex flow features in nozzle orifice, and to study the influences of the relative position of nozzles orifice axis and nozzle axis, and inclination angle of nozzle hole on the internal flow feature.

scholarly journals Increase of the Atomization of a Liquid Jet by Cavitation in a Nozzle Hole.

1997 ◽  
Vol 63 (613) ◽  
pp. 3144-3149 ◽  
Author(s):  
Nobushige TAMAKI ◽  
Keiya NISHIDA ◽  
Masanori SHIMIZU ◽  
Hiroyuki HIROYASU
Keyword(s):  
Liquid Jet ◽  
Nozzle Hole

Visualization of Cavitation Inside Nozzle Hole and Injected Liquid Jet

2015 ◽  
Author(s):  
R. Inagaki ◽  
T. Yamazaki ◽  
T. Haibara ◽  
S. Mitani ◽  
Eriko Matsumura ◽  
...  
Keyword(s):  
Liquid Jet ◽  
Nozzle Hole

scholarly journals Atomization of High-Viscous Liquid Jet by Cavitation in the Nozzle Hole

2005 ◽  
Vol 71 (702) ◽  
pp. 632-640 ◽  
Author(s):  
Nobushige TAMAKI ◽  
Masanori SHIMIZU ◽  
Hiroyuki HIROYASU
Keyword(s):  
Viscous Liquid ◽  
Liquid Jet ◽  
Nozzle Hole

The effect of transient needle lift on the internal flow and near-nozzle spray characteristics for modern GDI systems investigated by high-speed X-ray imaging

2021 ◽  
pp. 146808742098675 ◽  
Author(s):  
Dmitrii Mamaikin ◽  
Tobias Knorsch ◽  
Philipp Rogler ◽  
Jin Wang ◽  
Michael Wensing
Keyword(s):  
High Speed ◽  
Near Field ◽  
Internal Flow ◽  
Transient Behavior ◽  
Liquid Jet ◽  
Nozzle Flow ◽  
Spray Characteristics ◽  
X Ray ◽  
X Ray Imaging ◽  
Primary Breakup

The development of the injector nozzle is a dynamic area in regard of several technical aspects. At first, the internal flow influences the near-field spray characteristics via various phenomena such as cavitation and turbulence. However, these phenomena are not fully understood due to their extremely fast, complex and multiscale nature. Furthermore, it governs the spray targeting inside the combustion chamber. High-speed X-ray imaging of GDI injector nozzles is performed in this study. The experimental results presented are related to the internal flow and primary breakup of discharged liquid jets. The injectors used are equipped with nozzles made of aluminum which have been specially developed for these investigations to enhance optical accessibility. The visualization of the needle motion, in-nozzle flow and the primary breakup region provides several exciting observations. First, the needle lift tracking exhibits short overshooting right before the steady-state of the injection phase. This event leads to a short-term, however, significant change in the associated performance of the breakup. This phenomenon is found to be a consequence of the transient behavior of the in-nozzle flow. It is shown that under some circumstances hydraulic flip may occur during this overshooting period. The primary jet breakup region is visualized and evaluated by means of image processing. Thus, the transient behavior of liquid jet expansion is quantified in the vicinity of the nozzle. It is observed that the liquid jet direction deviates from the hole axis already at the nozzle outlet, which is caused by internal flow characteristics.

EFFECTS OF CAVITATION AND INTERNAL FLOW ON ATOMIZATION OF A LIQUID JET

1998 ◽  
Vol 8 (2) ◽  
pp. 179-197 ◽  
Author(s):  
N. Tamaki ◽  
M. Shimizu ◽  
Keiya Nishida ◽  
Hiroyuki Hiroyasu
Keyword(s):  
Internal Flow ◽  
Liquid Jet

scholarly journals Disintegrating process of a liquid jet and internal flow in a nozzle.

1990 ◽  
Vol 56 (528) ◽  
pp. 2519-2525 ◽  
Author(s):  
Masanori SHIMIZU ◽  
Masataka ARAI ◽  
Hiroyuki HIROYASU
Keyword(s):  
Internal Flow ◽  
Liquid Jet

Study of the effect of nozzle hole shape on internal flow and spray characteristics

2016 ◽  
Vol 71 ◽  
pp. 1-8 ◽  
Author(s):  
Zhixia He ◽  
Genmiao Guo ◽  
Xicheng Tao ◽  
Wenjun Zhong ◽  
Xianying Leng ◽  
...  
Keyword(s):  
Internal Flow ◽  
Spray Characteristics ◽  
Hole Shape ◽  
Nozzle Hole
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