Effects of Physical Properties of Fuels on Diesel Injection

1990 ◽  
Vol 112 (3) ◽  
pp. 308-316 ◽  
Author(s):  
N. A. Henein ◽  
B. Jawad ◽  
E. Gulari
Keyword(s):  
High Pressure ◽  
Physical Properties ◽  
Droplet Size ◽  
Drop Size ◽  
Droplet Size Distribution ◽  
High Pressure Chamber ◽  
Fraunhofer Diffraction ◽  
Injection Process ◽  
Pressure Line ◽  
Diesel Injection

The physical properties of the fuel, such as density, viscosity, surface tension, and bulk modulus of elasticity, affect many aspects of the diesel injection process. The effects of these fuel properties on the fuel pressure in the high-pressure line, rate of injection, leakage, spray penetration, and droplet size distribution were determined experimentally. The mechanism of spray development was investigated by injecting the fuel into a high-pressure chamber. A pulsed Malvern drop-size analyzer, based on Fraunhofer diffraction, was utilized to determine droplet size ranges for various fuels.

High Pressure Physical Properties of Fluids used in Diesel Injection Systems

2000 ◽  
Author(s):  
L. M. Rodriguez-Anton ◽  
J. Casanova-Kindelan ◽  
G. Tardajos
Keyword(s):  
High Pressure ◽  
Physical Properties ◽  
Diesel Injection

scholarly journals Numerical simulation of high-pressure gas atomization of two-phase flow: Effect of gas pressure on droplet size distribution

2019 ◽  
Vol 30 (11) ◽  
pp. 2726-2732 ◽  
Author(s):  
Kalpana Hanthanan Arachchilage ◽  
Majid Haghshenas ◽  
Sharon Park ◽  
Le Zhou ◽  
Yongho Sohn ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Size Distribution ◽  
Droplet Size ◽  
Droplet Size Distribution ◽  
Gas Pressure ◽  
Phase Flow ◽  
Gas Atomization ◽  
Two Phase ◽  
Flow Effect

The Measuring of Sodium Droplet Size Distribution and its Impact on the Consequence of Sodium Spray Fire

2017 ◽  
Author(s):  
Wang Guozhi ◽  
Du Haiou ◽  
Wang Rongdong ◽  
Shi Wentao ◽  
Piao Jun
Keyword(s):  
Size Distribution ◽  
Droplet Size ◽  
Input Data ◽  
Drop Size ◽  
Droplet Size Distribution ◽  
Drop Size Distribution ◽  
Liquid Sodium ◽  
The Real ◽  
Temperature And Pressure ◽  
The Impact

The sodium droplet size distribution has significant impact on the consequence of sodium spray fire. And it is fundamental input data for the validation and application of sodium spray fire code. The experiments were carried out in a closed vessel to measure the sodium droplet size distribution. Liquid sodium of 250 °C was sprayed downward into the vessel in the form of sodium droplets through a nozzle with a diameter of 2.4mm. The vessel was inerted by argon gas to prevent the sodium droplets from burning. A real time spray droplet sizing system based on ensemble diffraction technique was used to measure the size of the droplets. And the laser beam was passed through two glass windows on the wall of the vessel to reach the sodium droplets. The tests showed that the sizes of the sodium droplets ranged from 184μm to 1000μm at the nozzle pressure of 0.15MPa. And median diameter was 532μm. The sodium spray fire code named NACOM was used to evaluate the impact of particle size distribution on sodium fire. The measured sodium droplets size distribution and the Nukiyama-tanasama drop size distribution were divided into 11 groups to be used as input data for the NACOM code. A comparison showed that 23% of particles in Nukiyama-tanasama drop size distribution were over 1000μm, while the largest size of particles in the measured sodium droplets was 1000μm. The calculation by NACOM code showed that the trend and value of temperature and pressure in the vessel were similar, so to some extent Nukiyama-tanasama drop size distribution is a good approximation of the real sodium droplet size distribution. However, Nukiyama-tanasama drop size distribution may be unsuitable for application in sodium fire safety analysis, because the temperature and pressure calculated from which was lower than that of the real droplet size distribution.

Two-Phase Flow Simulation of High-Pressure Gas Atomization: Effect of Molten Metal and Atomizing Gas Properties on Droplet Size Distribution

2019 ◽  
Author(s):  
Kalpana Hanthanan Arachchilage ◽  
Majid Haghshenas ◽  
Ranganathan Kumar
Keyword(s):  
High Pressure ◽  
Molten Metal ◽  
Droplet Size ◽  
Low Carbon Steel ◽  
Flow Simulation ◽  
Droplet Size Distribution ◽  
Gas Atomization ◽  
Low Carbon ◽  
Interfacial Instabilities ◽  
Two Phase

Abstract Numerical simulations of high-pressure gas atomization are performed by varying the molten metal and the atomizing gas to understand the physics behind high-pressure gas atomization and the effects of the melt and the atomizing gas on droplet size distributions. The Volume of Fluid method is used in the OpenFoam platform. The three melt-gas combinations used in these simulations are aluminum-nitrogen, aluminum-argon, and low carbon steel-nitrogen. Three interfacial instabilities have been identified in the early stages of all three atomization processes. Comparison of aluminum and steel as the molten metal indicates that steel atomizes more effectively and provides a higher yield than aluminum. However, changing the atomizing gas does not result in a significant change in the atomization process.

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