scholarly journals Effect of Nozzle Length on Jet Occurring Explosive Droplets Splashing

2020 ◽  
Vol 40 (11) ◽  
pp. 17-22
Author(s):  
Tsutomu ISHIDO ◽  
Hiroaki HASEGAWA
Keyword(s):  
Nozzle Length

The Sensitivity of Inner Nozzle Flow in Gasoline Direct Injection Injector to the Nozzle Geometry Parameters

2019 ◽  
Vol 141 (6) ◽  
Author(s):  
Xinhai Li ◽  
Yong Cheng ◽  
Xiaoyan Ma ◽  
Xue Yang
Keyword(s):  
Structural Parameters ◽  
Direct Injection ◽  
Large Diameter ◽  
Small Diameter ◽  
Flow Characteristics ◽  
Gasoline Direct Injection ◽  
Nozzle Geometry ◽  
Nozzle Flow ◽  
Nozzle Length ◽  
Injector Nozzle

The inner-flow of gasoline direct injection (GDI) injector nozzles plays an important role in the process of spray, and affects the mixture process in gasoline engine cylinder. The nozzle structure also affects the inner-flow of GDI injector. In order to obtain uniform performance of GDI injector, the size consistency of injector nozzle should be ensured. This paper researches the effect of nozzle length and diameter on the inner flow and analyzes the sensitivity of inner flow characteristics to these structural parameters. First, this paper reveals the process of inception, development, and saturated condition of cavitation phenomenon in injector nozzle. Second, the inner-nozzle flow characteristics are more sensitive to small diameter than large diameter under the short nozzle length, while the sensitivity of the inner-nozzle flow characteristics to large nozzle diameter becomes strong as the increase of the nozzle length. Finally, the influence of nozzle angle on the injection mass flow is studied, and the single nozzle fuel mass will increase as the decrease of nozzle angle α. And the sensitivity of inner-flow characteristic to nozzle angle becomes strong as the decrease of α.

Graphene oxide and graphene fiber produced by different nozzle size, feed rate and reduction time with vitamin C

2016 ◽  
Vol 48 (1) ◽  
pp. 292-303 ◽  
Author(s):  
Nuray Ucar ◽  
Gokcen Gokceli ◽  
Ilkay Ozsev Yuksek ◽  
Aysen Onen ◽  
Nilgun Karatepe Yavuz
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Vitamin C ◽  
Feed Rate ◽  
Processing Conditions ◽  
Reduction Time ◽  
Fiber Properties ◽  
Nozzle Length ◽  
Nozzle Size

The processing conditions of graphene oxide and graphene fibers are important for final fiber properties. The effect of different processing conditions such as feed rate, nozzle size (length and diameter), and reduction time by vitamin C on fiber properties such as morphology, mechanical properties and electrical conductivity has been analyzed. It has been observed that at the constant feed rates, increase in nozzle length results in higher mechanical properties. For the samples produced with long nozzle, thinner nozzle results to higher mechanical properties than thicker one. Decrease in nozzle length and increase in feed rate and reduction time by vitamin C resulted in an increased crimpy structure of fiber surface. Higher fiber strength was observed when the reduction time was decreased. The increase in the feed rate resulted in an increase of fiber linear densities (tex). All fibers experimented were in the semiconductor range. In this study, it has been seen that short, thin nozzles with 10 ml/h feed rate and reduction with 2.5 h provided better mechanical properties along with electrical conductivity.

scholarly journals Noise reduction with lobed mixers - Nozzle-length and free-jet speed effects

1997 ◽  
Author(s):  
Vinod Mengle ◽  
Willam Dalton ◽  
James Bridges ◽  
Kathy Boyd ◽  
Vinod Mengle ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Free Jet ◽  
Nozzle Length

Effects of Nozzle Length and Process Parameters on Highly Constricted Oxygen Plasma Cutting Arc

2008 ◽  
Vol 28 (6) ◽  
pp. 729-747 ◽  
Author(s):  
Qianhong Zhou ◽  
Hui Li ◽  
Feng Liu ◽  
Shaofeng Guo ◽  
Wenkang Guo ◽  
...  
Keyword(s):  
Process Parameters ◽  
Oxygen Plasma ◽  
Plasma Cutting ◽  
Nozzle Length

scholarly journals Study on double coaxial pipe jets. (1st Report, Effects of outer nozzle length).

1989 ◽  
Vol 55 (520) ◽  
pp. 3666-3672
Author(s):  
Takahiro KIWATA ◽  
Atsushi OKAJIMA ◽  
Taroh NAGAHISA
Keyword(s):  
Nozzle Length

Important Residual Stress Features in Reactor Nozzle Dissimilar Metal Welds

2011 ◽  
Author(s):  
Jinmiao Zhang ◽  
Shaopin Song ◽  
Pingsha Dong
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Nuclear Reactor ◽  
Residual Stress Distribution ◽  
Stress Distributions ◽  
Weld Overlay ◽  
Dissimilar Metal ◽  
Nozzle Length ◽  
Dissimilar Metal Weld ◽  
Metal Weld

This paper is focused on the study of residual stress distribution at a dissimilar metal weld (DMW) of nuclear reactor nozzle. The paper extends some of the recent research on this subject by investigating the effect of weld sequence and nozzle length design on the residual stress distributions. It also investigates the effect of a partial excavation repair and a weld overlay on the residual stress distribution. As a result, some of the important residual stress features at DMW are revealed and these features are discussed and summarized in the paper.

Entrainment by Turbulent Jets Issuing From Sharp-Edged Inlet Round Nozzles

1987 ◽  
Vol 109 (3) ◽  
pp. 248-254 ◽  
Author(s):  
T. A. Trabold ◽  
E. B. Esen ◽  
N. T. Obot
Keyword(s):  
Reynolds Number ◽  
Nozzle Exit ◽  
Parametric Study ◽  
Turbulent Jets ◽  
Plenum Chamber ◽  
Nozzle Length ◽  
Air Jets ◽  
Partial Confinement ◽  
Chamber Measurements

Experiments were carried out to determine entrainment rates by turbulent air jets generated with square-edged inlet round nozzles. A parametric study was made which included the effects of Reynolds number, nozzle length, partial confinement and geometry of the jet plenum chamber. Measurements were made for the region extending from the nozzle exit to 24 jet hole diameters downstream. There is a large difference in the rate of fluid entrainment between jets generated with relatively short nozzles and those discharged through long tubes.

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