X-RAY RADIOGRAPHY MEASUREMENTS OF DIESEL SPRAY STRUCTURE AT ENGINE-LIKE AMBIENT DENSITY

2009 ◽  
Vol 19 (11) ◽  
pp. 1031-1044 ◽  
Author(s):  
Alan L. Kastengren ◽  
Christopher F. Powell ◽  
Yujie Wang ◽  
Kyoung-Su Im ◽  
Jin Wang
Keyword(s):  
Diesel Spray ◽  
X Ray ◽  
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.

J0503-2-3 Development of the Spatiotemporal Measurement Technique for the Diesel Spray Structure

2010 ◽  
Vol 2010.7 (0) ◽  
pp. 61-62
Author(s):  
Tetsuya YANO ◽  
Naohiro MARUBAYASHI ◽  
Tsukasa HORI ◽  
Jiro SENDA ◽  
Hajime FUJIMOTO
Keyword(s):  
Measurement Technique ◽  
Diesel Spray ◽  
Spray Structure

Compressible Large-Eddy Simulation of Diesel Spray Structure using OpenFOAM

2015 ◽  
Author(s):  
Tsukasa Hori ◽  
Minoru Hanasaki ◽  
Jun Komae ◽  
Eriko Matsumura ◽  
Jiro Senda
Keyword(s):  
Large Eddy Simulation ◽  
Diesel Spray ◽  
Eddy Simulation ◽  
Spray Structure ◽  
Large Eddy

scholarly journals CHARACTERIZATION OF DIESEL SPRAY IMAGES USING A SHAPE PROCESSING METHODOLOGY

2011 ◽  
Vol 24 (2) ◽  
pp. 95 ◽  
Author(s):  
Cecile Petit ◽  
Wolfgang Reckers ◽  
Jean-Marie Becker ◽  
Michel Jourlin
Keyword(s):  
Combustion Process ◽  
Diesel Spray ◽  
Spray Structure ◽  
Shape Coding ◽  
Spray Plume ◽  
Shape Processing ◽  
Air Mixing ◽  
Efficient Combustion ◽  
And Behavior

In Diesel engines, a key element in achieving a clean and efficient combustion process is a proper fuel-air mixing, which is a consequence of the fuel spray development and fuel-air interaction inside the engine combustion chamber. The spray structure and behavior are classically described by the length (penetration) and width (angle) of the spray plume but these parameters do not give any clue on the geometrical injection center and on the spray symmetry. The purpose of this paper is to find out original tools to characterize the Diesel spray: the virtual spray origin is the geometrical injection center, which may (or may not) coincide with the injector axis. Another interesting point is the description of the Diesel spray in terms of symmetry: the spray plume internal and external symmetry characterize the spray and the injector performance. Our approach is first to find out the virtual spray origin: after the image segmentation, the spray is coded with the Freeman code and with an original shape coding from which the moments are derived. The symmetry axes are then computed and the spray plumes are discarded (or not) for the virtual spray origin computation, which is derived from a Voronoi diagram. The last step is the internal and external spray plume symmetry characterization thanks to correlation and mathematical distances.

Near Nozzle Diesel Spray Modeling and X-Ray Measurements

2006 ◽  
Author(s):  
Ville Vuorinen ◽  
Martti Larmi ◽  
Eero Antila ◽  
Ossi Kaario ◽  
Essam El-Hannouny ◽  
...  
Keyword(s):  
Diesel Spray ◽  
X Ray

VAPORIZATION EFFECTS ON TRANSIENT DIESEL SPRAY STRUCTURE

2011 ◽  
Vol 21 (5) ◽  
pp. 411-426 ◽  
Author(s):  
Chetan Bajaj ◽  
John Abraham ◽  
Lyle M. Pickett
Keyword(s):  
Diesel Spray ◽  
Spray Structure

Analysis of diesel spray structure using a hybrid model

2007 ◽  
Vol 21 (12) ◽  
pp. 2205-2213
Author(s):  
Sungsik Chung ◽  
Jongsang Park ◽  
Sipom Kim ◽  
Jeongkuk Yeom
Keyword(s):  
Hybrid Model ◽  
Diesel Spray ◽  
Spray Structure

scholarly journals LES Analysis of Diesel Spray Structure

2007 ◽  
Vol 42 (1) ◽  
pp. 75-80
Author(s):  
Jiro SENDA ◽  
Tsukasa HORI
Keyword(s):  
Diesel Spray ◽  
Spray Structure
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