Diesel Spray Analysis

2005 ◽  
Author(s):  
Badih A. Jawad ◽  
Chris H. Riedel ◽  
Ahmad Bazzari
Keyword(s):  
Pattern Analysis ◽  
Single Injection ◽  
Diffraction Method ◽  
Laser Diffraction ◽  
Time Dependent ◽  
Diesel Spray ◽  
Particle Sizing ◽  
Fraunhofer Diffraction ◽  
High Quality ◽  
Spray Penetration

Light scattering based particle sizing techniques have the advantage of nonintrusively measuring sizes of emulsions and dispersions. Depending on the parameters involved, there are several techniques that can be used and a choice of the most convenient method can be made. When the particles are large, Fraunhofer Diffraction Pattern Analysis (FDPA) can be employed in measuring particle-sizing distributions. The design of a high quality diesel engine would involve an understanding of the disintegration mechanism, spray penetration, and spray motion. It is the objective of this paper to implement the FDPA laser diffraction method to determine spray penetration and droplet mean diameters, for single injection of diesel fuel with synchronized time that will allow time dependent studies.

Improved Chin-Shifrin Algorithm in the Measurement of Particle Sizing Used by Fraunhofer Diffraction Method

2016 ◽  
Vol 45 (11) ◽  
pp. 1105002
Author(s):  
陈泉 CHEN Quan ◽  
刘伟 LIU Wei ◽  
窦智 YANG Lin ◽  
杨林 WANG Ya-jing ◽  
申晋 SHEN Jin
Keyword(s):  
Diffraction Method ◽  
Particle Sizing ◽  
Fraunhofer Diffraction

Particle sizing by the Fraunhofer diffraction method based on an approximate non-negatively constrained Chin-Shifrin algorithm

2017 ◽  
Vol 317 ◽  
pp. 95-103 ◽  
Author(s):  
Quan Chen ◽  
Wei Liu ◽  
WenJing Wang ◽  
John C. Thomas ◽  
Jin Shen
Keyword(s):  
Diffraction Method ◽  
Particle Sizing ◽  
Fraunhofer Diffraction

Determination of Particle Size Distribution Using Laser Diffraction Technique

2004 ◽  
Author(s):  
Badih A. Jawad ◽  
Chris H. Riedel ◽  
Ahmad A. Bazzari
Keyword(s):  
Size Distribution ◽  
Injection Pressure ◽  
Diffraction Method ◽  
Droplet Size Distribution ◽  
Laser Diffraction ◽  
Chamber Pressure ◽  
Spray Penetration ◽  
Digital Oscilloscope ◽  
Atomization Mechanism

Understanding the disintegration mechanism, spray penetration, and spray motion is of great importance in the design of a high quality diesel engine. The atomization process that a liquid would undergo as it is injected into a high-temperature, high-pressure air, is investigated in this work. The purpose of this study is to gain further insight into the atomization mechanism, the variation over time in droplet size distribution and spray penetration. This is done based on effect of chamber pressure, injection pressure, and type of fuel. A laser diffraction method is used to determine droplet mean diameters, single injection with synchronized time mechanism allowed the time dependent studies. Obscuration signals are obtained through a digital oscilloscope from which arrival time of spray can be measured. The spray penetration correlation obtained is compared to other correlation’s obtained from different other techniques used in the literature.

Analysis of Intermittent Sprays

2002 ◽  
Author(s):  
Badih A. Jawad
Keyword(s):  
Arrival Time ◽  
Single Injection ◽  
Injection Pressure ◽  
Diffraction Method ◽  
Droplet Size Distribution ◽  
Chamber Pressure ◽  
Spray Penetration ◽  
Digital Oscilloscope ◽  
Atomization Mechanism ◽  
Insight Into

The purpose of this study is to gain further insight into the atomization mechanism, the variation over time in droplet size distribution and spray penetration. This is done based on effect of chamber pressure, injection pressure, and type of fuel. A laser diffraction method is used to determine droplet mean diameters, single injection with synchronized time mechanism allowed the time dependent studies. Obscuration signals are obtained through a digital oscilloscope from which arrival time of spray can be measured. The spray penetration correlation obtained is compared to other correlations obtained from other techniques used in the literature.

Measurement of soil dry aggregate size distribution using the laser diffraction method

2021 ◽  
Vol 211 ◽  
pp. 105023
Author(s):  
C. Polakowski ◽  
A. Sochan ◽  
M. Ryżak ◽  
M. Beczek ◽  
R. Mazur ◽  
...  
Keyword(s):  
Size Distribution ◽  
Diffraction Method ◽  
Aggregate Size ◽  
Laser Diffraction ◽  
Aggregate Size Distribution

scholarly journals Particle Size Distribution of Various Soil Materials Measured by Laser Diffraction—The Problem of Reproducibility

Minerals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 465
Author(s):  
Cezary Polakowski ◽  
Magdalena Ryżak ◽  
Agata Sochan ◽  
Michał Beczek ◽  
Rafał Mazur ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Normal Distribution ◽  
Size Distribution ◽  
Precise Measurement ◽  
Soil Analysis ◽  
Statistical Tests ◽  
Diffraction Method ◽  
Laser Diffraction ◽  
Method Analysis

Particle size distribution is an important soil parameter—therefore precise measurement of this characteristic is essential. The application of the widely used laser diffraction method for soil analysis continues to be a subject of debate. The precision of this method, proven on homogeneous samples, has been implicitly extended to soil analyses, but this has not been sufficiently well confirmed in the literature thus far. The aim of this study is to supplement the information available on the precision of the method in terms of reproducibility of soil measurement and whether the reproducibility of soil measurement is characterized by a normal distribution. To estimate the reproducibility of the laser diffraction method, thirteen various soil samples were characterized, and results were analysed statistically. The coefficient of variation acquired was lowest (3.44%) for silt and highest for sand (23.28%). Five of the thirteen tested samples were characterized by a normal distribution. The fraction content of eight samples was not characterized by normal distribution, but the extent of this phenomenon varied between soils. Although the laser diffraction method is repeatable, the measurement of soil particle size distribution can have limited reproducibility. The main cause seems to be small amounts of sand particles. The error can be amplified by the construction of the dispersion unit. Non-parametric statistical tests should be used by default for soil laser diffraction method analysis.

Validation of Laser Diffraction Method as a Substitute for Cascade Impaction in the European Project for a Nebulizer Standard

2001 ◽  
Vol 14 (1) ◽  
pp. 107-114 ◽  
Author(s):  
L. Vecellio None ◽  
D. Grimbert ◽  
M.H. Becquemin ◽  
E. Boissinot ◽  
A. Le Pape ◽  
...  
Keyword(s):  
Diffraction Method ◽  
Laser Diffraction ◽  
European Project ◽  
Cascade Impaction
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