Cycle-Resolved PDA Measurement of Size-Classified Spray Structure of Air-Assist Injector

1997 ◽  
Author(s):  
Yuji Ikeda ◽  
Shigeo Hosokawa ◽  
Fukashi Sekihara ◽  
Tsuyoshi Nakajima
Keyword(s):  
Spray Structure ◽  
Pda Measurement

EXPERIMENTAL INVESTIGATION OF NEAR NOZZLE SPRAY STRUCTURE AND VELOCITY FOR A GDI HOLLOWCONE SPRAY

2010 ◽  
Vol 20 (12) ◽  
pp. 1065-1076 ◽  
Author(s):  
D. Martin ◽  
M. Cardenas ◽  
Philipp Pischke ◽  
R. Kneer
Keyword(s):  
Experimental Investigation ◽  
Spray Structure

scholarly journals Three-dimensional Simulation and Analysis of Spray Structure inVertical MOCVD Reaction Chamber

2020 ◽  
Vol 585 ◽  
pp. 012183
Author(s):  
Liu Changjiang ◽  
Li Zhiming ◽  
Guo Runqiu ◽  
Feng Lansheng ◽  
YangShun Tao
Keyword(s):  
Three Dimensional ◽  
Reaction Chamber ◽  
Spray Structure ◽  
Dimensional Simulation

Influence of Biodiesel Blended in Gasoline-Based Fuels on Macroscopic Spray Structure from a Diesel Injector

2019 ◽  
Vol 20 (4) ◽  
pp. 701-711 ◽  
Author(s):  
Sakda Thongchai ◽  
Ocktaeck Lim
Keyword(s):  
Spray Structure

Measurement of Biodiesel Blend and Conventional Diesel Spray Structure Using X-Ray Radiography

2009 ◽  
Vol 131 (6) ◽  
Author(s):  
A. L. Kastengren ◽  
C. F. Powell ◽  
K.-S. Im ◽  
Y.-J. Wang ◽  
J. Wang
Keyword(s):  
Cone Angle ◽  
Injection Pressure ◽  
Fuel Distribution ◽  
X Ray ◽  
Spray Structure ◽  
Quantitative Measurements ◽  
Biodiesel Blend ◽  
Temporal And Spatial ◽  
Nozzle Geometries ◽  
Fuel Effects

The near-nozzle structure of several nonevaporating biodiesel-blend sprays has been studied using X-ray radiography. Radiography allows quantitative measurements of the fuel distribution in sprays to be made with high temporal and spatial resolution. Measurements have been made at different values of injection pressure, ambient density, and with two different nozzle geometries to understand the influences of these parameters on the spray structure of the biodiesel blend. These measurements have been compared with corresponding measurements of Viscor, a diesel calibration fluid, to demonstrate the fuel effects on the spray structure. Generally, the biodiesel-blend spray has a similar structure to the spray of Viscor. For the nonhydroground nozzle used in this study, the biodiesel-blend spray has a slightly slower penetration into the ambient gas than the Viscor spray. The cone angle of the biodiesel-blend spray is generally smaller than that of the Viscor spray, indicating that the biodiesel-blend spray is denser than the Viscor spray. For the hydroground nozzle, both fuels produce sprays with initially wide cone angles that transition to narrow sprays during the steady-state portion of the injection event. These variations in cone angle with time occur later for the biodiesel-blend spray than for the Viscor spray, indicating that the dynamics of the injector needle as it opens are somewhat different for the two fuels.

Tailoring the flash-boiling spray structure through the control of plume-to-plume interaction

2021 ◽  
Author(s):  
Qinglin Xu ◽  
Shangze Yang ◽  
Di Xiao ◽  
Xuesong Li ◽  
Min Xu
Keyword(s):  
Spray Structure ◽  
Flash Boiling

Experimental Study of Superheated Kerosene Jet Fuel Sprays From a Pressure-Swirl Nozzle

2017 ◽  
Author(s):  
Shaji S. Manipurath
Keyword(s):  
Laser Sheet ◽  
Cone Angle ◽  
Test Facility ◽  
Chamber Pressure ◽  
Engine Fuel ◽  
Fuel Temperature ◽  
Solid Cone ◽  
Spray Cone ◽  
Spray Structure ◽  
Pressure Swirl

The development of higher thermal stability fuels and the development of onboard fuel deoxygenation systems may permit the preheating of fuel up to about 755 K before the onset of pyrolysis. At a sufficiently high fuel temperature for a given combustion chamber pressure, the flash vaporization of liquid or supercritical state fuel can ensue upon injection into the chamber. The performance of standard aviation turbine engine fuel nozzles, designed for mechanically breaking up liquid sprays, may thus be significantly altered by the employment of severely preheated fuel. An evaluation of heated and superheated Jet A-1 sprays from a pressure-swirl atomizer was implemented in a purpose-built test facility. Laser sheet imaging of the spray yielded simultaneous axial cross-sectional maps of Mie-scatter and fluorescence signals. In addition, particle image velocimetry was also used to measure the spray droplet velocity-field. The results indicated that increasing the fuel’s dimensionless level of superheat ΔT* from −1.8 to 0.6 yielded significant changes in the spray structure; specifically, finer droplet sizes, a more uniform dropsize distribution across the spray, increased spray cone angle till about ΔT* = −0.8 followed by a contraction thereafter, marginally increased spray penetration, and significantly higher localised near nozzle tip droplet velocities. The measurements supported the hypothesis that the initial hollow-cone spray structure evolves to a near solid-cone structure with a central vapour core as the fuel is superheated.

Experimental Study on Electro-Spraying of Ethanol Based on PDA Measurement

2017 ◽  
pp. 87-92
Author(s):  
Haige Li ◽  
Yunhua Gan ◽  
Xiaowen Chen ◽  
Yang Tong ◽  
Meilong Hu
Keyword(s):  
Experimental Study ◽  
Pda Measurement

scholarly journals Strength Evaluation of Alumina's Spray Coating : 4th Report, Consideration of Spray Structure Strength for Mechanical Stress

2009 ◽  
Vol 75 (756) ◽  
pp. 1097-1105
Author(s):  
Tooru ARAMAKI ◽  
Shigeru HAMADA ◽  
Hiroshi NOGUCHI ◽  
Shinya MIYAJI ◽  
Toshihiro TACHIKAWA ◽  
...  
Keyword(s):  
Mechanical Stress ◽  
Spray Coating ◽  
Strength Evaluation ◽  
Spray Structure ◽  
Structure Strength
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